./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier-loop.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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/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 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c --- 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 15:56:01,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:56:01,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:56:01,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:56:01,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:56:01,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:56:01,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:56:01,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:56:01,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:56:01,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:56:01,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:56:01,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:56:01,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:56:01,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:56:01,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:56:01,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:56:01,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:56:01,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:56:01,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:56:01,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:56:01,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:56:01,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:56:01,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:56:01,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:56:01,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:56:01,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:56:01,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:56:01,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:56:01,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:56:01,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:56:01,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:56:01,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:56:01,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:56:01,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:56:01,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:56:01,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:56:01,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:56:01,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:56:01,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:56:01,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:56:01,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:56:01,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:56:01,821 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:56:01,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:56:01,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:56:01,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:56:01,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:56:01,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:56:01,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:56:01,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:56:01,824 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:56:01,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:56:01,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:56:01,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:56:01,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:56:01,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:56:01,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:56:01,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:56:01,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:56:01,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:56:01,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:56:01,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:56:01,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:56:01,827 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:56:01,828 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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c [2022-12-13 15:56:02,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:56:02,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:56:02,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:56:02,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:56:02,044 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:56:02,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2022-12-13 15:56:04,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:56:04,807 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:56:04,807 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2022-12-13 15:56:04,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/data/7e6542a56/33ab1ac7bd534b21aa2d26a1cceba4a7/FLAGac2be47eb [2022-12-13 15:56:04,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/data/7e6542a56/33ab1ac7bd534b21aa2d26a1cceba4a7 [2022-12-13 15:56:04,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:56:04,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:56:04,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:56:04,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:56:04,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:56:04,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:56:04" (1/1) ... [2022-12-13 15:56:04,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47165432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:04, skipping insertion in model container [2022-12-13 15:56:04,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:56:04" (1/1) ... [2022-12-13 15:56:04,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:56:04,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:56:04,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:04,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:04,993 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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2022-12-13 15:56:04,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:56:05,004 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:56:05,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,016 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,016 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,016 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,016 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:56:05,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:56:05,033 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_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2022-12-13 15:56:05,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:56:05,045 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:56:05,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05 WrapperNode [2022-12-13 15:56:05,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:56:05,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:56:05,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:56:05,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:56:05,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,075 INFO L138 Inliner]: procedures = 25, calls = 120, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 248 [2022-12-13 15:56:05,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:56:05,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:56:05,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:56:05,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:56:05,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:56:05,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:56:05,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:56:05,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:56:05,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (1/1) ... [2022-12-13 15:56:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:56:05,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:56:05,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:56:05,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ea9fe15-5a17-41ed-a1d9-1b41682e245a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:56:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:56:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:56:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 15:56:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 15:56:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-13 15:56:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-12-13 15:56:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:56:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:56:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:56:05,171 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 15:56:05,252 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:56:05,254 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:56:05,565 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:56:05,607 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:56:05,607 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:56:05,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:56:05 BoogieIcfgContainer [2022-12-13 15:56:05,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:56:05,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:56:05,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:56:05,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:56:05,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:56:04" (1/3) ... [2022-12-13 15:56:05,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6645a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:56:05, skipping insertion in model container [2022-12-13 15:56:05,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:56:05" (2/3) ... [2022-12-13 15:56:05,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6645a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:56:05, skipping insertion in model container [2022-12-13 15:56:05,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:56:05" (3/3) ... [2022-12-13 15:56:05,615 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2022-12-13 15:56:05,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:56:05,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 15:56:05,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:56:05,708 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-12-13 15:56:05,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 284 transitions, 640 flow [2022-12-13 15:56:05,800 INFO L130 PetriNetUnfolder]: 14/252 cut-off events. [2022-12-13 15:56:05,800 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:56:05,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 252 events. 14/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 491 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 208. Up to 3 conditions per place. [2022-12-13 15:56:05,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 284 transitions, 640 flow [2022-12-13 15:56:05,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 247 transitions, 542 flow [2022-12-13 15:56:05,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:56:05,821 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 247 transitions, 542 flow [2022-12-13 15:56:05,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 247 transitions, 542 flow [2022-12-13 15:56:05,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 247 transitions, 542 flow [2022-12-13 15:56:05,877 INFO L130 PetriNetUnfolder]: 14/247 cut-off events. [2022-12-13 15:56:05,878 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:56:05,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 247 events. 14/247 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 494 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 208. Up to 3 conditions per place. [2022-12-13 15:56:05,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 14400 [2022-12-13 15:56:09,029 INFO L134 LiptonReduction]: Checked pairs total: 98114 [2022-12-13 15:56:09,030 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-12-13 15:56:09,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:56:09,048 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;@787bf07a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:56:09,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-12-13 15:56:09,049 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 15:56:09,049 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:56:09,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:09,050 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 15:56:09,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:56:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1053, now seen corresponding path program 1 times [2022-12-13 15:56:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355121396] [2022-12-13 15:56:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:09,134 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 15:56:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:09,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355121396] [2022-12-13 15:56:09,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355121396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:09,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:09,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 15:56:09,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223304547] [2022-12-13 15:56:09,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:56:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:56:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:56:09,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 457 [2022-12-13 15:56:09,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 112 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:09,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:09,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 457 [2022-12-13 15:56:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:21,454 INFO L130 PetriNetUnfolder]: 130780/196337 cut-off events. [2022-12-13 15:56:21,454 INFO L131 PetriNetUnfolder]: For 12493/12493 co-relation queries the response was YES. [2022-12-13 15:56:21,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367184 conditions, 196337 events. 130780/196337 cut-off events. For 12493/12493 co-relation queries the response was YES. Maximal size of possible extension queue 8702. Compared 1706637 event pairs, 104620 based on Foata normal form. 0/127329 useless extension candidates. Maximal degree in co-relation 364676. Up to 157514 conditions per place. [2022-12-13 15:56:22,710 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 55 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2022-12-13 15:56:22,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 109 transitions, 376 flow [2022-12-13 15:56:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:56:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 15:56:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 552 transitions. [2022-12-13 15:56:22,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6039387308533917 [2022-12-13 15:56:22,724 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 552 transitions. [2022-12-13 15:56:22,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 552 transitions. [2022-12-13 15:56:22,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:22,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 552 transitions. [2022-12-13 15:56:22,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 276.0) internal successors, (552), 2 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 15:56:22,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 457.0) internal successors, (1371), 3 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:22,735 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 457.0) internal successors, (1371), 3 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:22,736 INFO L175 Difference]: Start difference. First operand has 123 places, 112 transitions, 272 flow. Second operand 2 states and 552 transitions. [2022-12-13 15:56:22,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 109 transitions, 376 flow [2022-12-13 15:56:23,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 344 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 15:56:23,216 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 234 flow [2022-12-13 15:56:23,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2022-12-13 15:56:23,220 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -14 predicate places. [2022-12-13 15:56:23,220 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 234 flow [2022-12-13 15:56:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:23,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:23,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:56:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:56:23,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:56:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 996116111, now seen corresponding path program 1 times [2022-12-13 15:56:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:23,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162477439] [2022-12-13 15:56:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:23,322 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 15:56:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162477439] [2022-12-13 15:56:23,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162477439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:23,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:23,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:56:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743694525] [2022-12-13 15:56:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:56:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:56:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:56:23,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 457 [2022-12-13 15:56:23,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:23,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:23,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 457 [2022-12-13 15:56:23,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:34,265 INFO L130 PetriNetUnfolder]: 133318/200469 cut-off events. [2022-12-13 15:56:34,266 INFO L131 PetriNetUnfolder]: For 3018/3018 co-relation queries the response was YES. [2022-12-13 15:56:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364811 conditions, 200469 events. 133318/200469 cut-off events. For 3018/3018 co-relation queries the response was YES. Maximal size of possible extension queue 8723. Compared 1745578 event pairs, 102147 based on Foata normal form. 0/130107 useless extension candidates. Maximal degree in co-relation 364808. Up to 154128 conditions per place. [2022-12-13 15:56:35,358 INFO L137 encePairwiseOnDemand]: 448/457 looper letters, 103 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2022-12-13 15:56:35,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 575 flow [2022-12-13 15:56:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:56:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:56:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2022-12-13 15:56:35,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5849744711889132 [2022-12-13 15:56:35,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2022-12-13 15:56:35,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2022-12-13 15:56:35,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:35,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2022-12-13 15:56:35,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:35,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:35,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:35,551 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 234 flow. Second operand 3 states and 802 transitions. [2022-12-13 15:56:35,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 575 flow [2022-12-13 15:56:35,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 575 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:56:35,553 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 290 flow [2022-12-13 15:56:35,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2022-12-13 15:56:35,554 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -10 predicate places. [2022-12-13 15:56:35,554 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 290 flow [2022-12-13 15:56:35,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:35,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:35,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:56:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:56:35,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:56:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 996116112, now seen corresponding path program 1 times [2022-12-13 15:56:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184027832] [2022-12-13 15:56:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:35,660 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 15:56:35,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184027832] [2022-12-13 15:56:35,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184027832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:35,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:35,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:56:35,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225552317] [2022-12-13 15:56:35,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:35,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:56:35,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:56:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:56:35,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 457 [2022-12-13 15:56:35,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:35,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:35,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 457 [2022-12-13 15:56:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:45,669 INFO L130 PetriNetUnfolder]: 132691/199838 cut-off events. [2022-12-13 15:56:45,670 INFO L131 PetriNetUnfolder]: For 6237/6245 co-relation queries the response was YES. [2022-12-13 15:56:46,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366229 conditions, 199838 events. 132691/199838 cut-off events. For 6237/6245 co-relation queries the response was YES. Maximal size of possible extension queue 8721. Compared 1746021 event pairs, 105797 based on Foata normal form. 241/130126 useless extension candidates. Maximal degree in co-relation 366224. Up to 160060 conditions per place. [2022-12-13 15:56:46,757 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 58 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2022-12-13 15:56:46,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 404 flow [2022-12-13 15:56:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:56:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:56:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2022-12-13 15:56:46,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5703865791393143 [2022-12-13 15:56:46,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2022-12-13 15:56:46,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2022-12-13 15:56:46,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:46,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2022-12-13 15:56:46,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:46,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:46,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:46,766 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 290 flow. Second operand 3 states and 782 transitions. [2022-12-13 15:56:46,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 404 flow [2022-12-13 15:56:46,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 113 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:56:46,776 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 274 flow [2022-12-13 15:56:46,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2022-12-13 15:56:46,777 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -12 predicate places. [2022-12-13 15:56:46,777 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 274 flow [2022-12-13 15:56:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:46,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:46,778 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:56:46,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:56:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -737416234, now seen corresponding path program 1 times [2022-12-13 15:56:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743378308] [2022-12-13 15:56:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:46,860 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 15:56:46,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:46,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743378308] [2022-12-13 15:56:46,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743378308] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:46,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:46,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:56:46,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392333135] [2022-12-13 15:56:46,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:46,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:56:46,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:56:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:56:46,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 457 [2022-12-13 15:56:46,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:46,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:46,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 457 [2022-12-13 15:56:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:54,914 INFO L130 PetriNetUnfolder]: 108919/166117 cut-off events. [2022-12-13 15:56:54,914 INFO L131 PetriNetUnfolder]: For 4546/4554 co-relation queries the response was YES. [2022-12-13 15:56:55,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303738 conditions, 166117 events. 108919/166117 cut-off events. For 4546/4554 co-relation queries the response was YES. Maximal size of possible extension queue 6872. Compared 1445035 event pairs, 83792 based on Foata normal form. 0/110465 useless extension candidates. Maximal degree in co-relation 303733. Up to 121876 conditions per place. [2022-12-13 15:56:55,833 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 101 selfloop transitions, 7 changer transitions 0/159 dead transitions. [2022-12-13 15:56:55,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 601 flow [2022-12-13 15:56:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:56:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:56:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2022-12-13 15:56:55,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5820568927789934 [2022-12-13 15:56:55,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2022-12-13 15:56:55,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2022-12-13 15:56:55,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:55,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2022-12-13 15:56:55,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:55,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:55,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:55,842 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 274 flow. Second operand 3 states and 798 transitions. [2022-12-13 15:56:55,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 601 flow [2022-12-13 15:56:55,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:56:55,859 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 331 flow [2022-12-13 15:56:55,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2022-12-13 15:56:55,860 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -9 predicate places. [2022-12-13 15:56:55,860 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 331 flow [2022-12-13 15:56:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:55,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:55,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:55,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:56:55,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:56:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -737416233, now seen corresponding path program 1 times [2022-12-13 15:56:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241918253] [2022-12-13 15:56:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:55,953 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 15:56:55,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:55,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241918253] [2022-12-13 15:56:55,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241918253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:55,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:55,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:56:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876882284] [2022-12-13 15:56:55,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:55,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:56:55,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:55,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:56:55,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:56:56,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 457 [2022-12-13 15:56:56,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:56:56,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:56,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 457 [2022-12-13 15:56:56,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:02,551 INFO L130 PetriNetUnfolder]: 80711/125003 cut-off events. [2022-12-13 15:57:02,551 INFO L131 PetriNetUnfolder]: For 13498/13498 co-relation queries the response was YES. [2022-12-13 15:57:02,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236866 conditions, 125003 events. 80711/125003 cut-off events. For 13498/13498 co-relation queries the response was YES. Maximal size of possible extension queue 5011. Compared 1072939 event pairs, 60466 based on Foata normal form. 5678/92271 useless extension candidates. Maximal degree in co-relation 236860. Up to 88996 conditions per place. [2022-12-13 15:57:03,263 INFO L137 encePairwiseOnDemand]: 448/457 looper letters, 124 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2022-12-13 15:57:03,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 183 transitions, 757 flow [2022-12-13 15:57:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:57:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:57:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1047 transitions. [2022-12-13 15:57:03,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5727571115973742 [2022-12-13 15:57:03,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1047 transitions. [2022-12-13 15:57:03,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1047 transitions. [2022-12-13 15:57:03,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:03,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1047 transitions. [2022-12-13 15:57:03,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.75) internal successors, (1047), 4 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:03,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:03,277 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 331 flow. Second operand 4 states and 1047 transitions. [2022-12-13 15:57:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 183 transitions, 757 flow [2022-12-13 15:57:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 743 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:03,340 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 331 flow [2022-12-13 15:57:03,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2022-12-13 15:57:03,341 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -10 predicate places. [2022-12-13 15:57:03,341 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 331 flow [2022-12-13 15:57:03,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:03,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:03,342 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:03,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:57:03,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash -510098935, now seen corresponding path program 1 times [2022-12-13 15:57:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:03,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968844887] [2022-12-13 15:57:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:03,381 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 15:57:03,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968844887] [2022-12-13 15:57:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968844887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:03,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:03,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:57:03,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955061177] [2022-12-13 15:57:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:03,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:03,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:03,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 457 [2022-12-13 15:57:03,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:03,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:03,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 457 [2022-12-13 15:57:03,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:11,550 INFO L130 PetriNetUnfolder]: 99717/150245 cut-off events. [2022-12-13 15:57:11,551 INFO L131 PetriNetUnfolder]: For 19179/19188 co-relation queries the response was YES. [2022-12-13 15:57:11,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290578 conditions, 150245 events. 99717/150245 cut-off events. For 19179/19188 co-relation queries the response was YES. Maximal size of possible extension queue 5909. Compared 1265461 event pairs, 59003 based on Foata normal form. 0/104505 useless extension candidates. Maximal degree in co-relation 290572. Up to 96262 conditions per place. [2022-12-13 15:57:12,344 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 123 selfloop transitions, 6 changer transitions 0/179 dead transitions. [2022-12-13 15:57:12,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 796 flow [2022-12-13 15:57:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2022-12-13 15:57:12,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5959153902261123 [2022-12-13 15:57:12,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2022-12-13 15:57:12,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2022-12-13 15:57:12,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:12,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2022-12-13 15:57:12,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:12,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:12,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:12,351 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 331 flow. Second operand 3 states and 817 transitions. [2022-12-13 15:57:12,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 796 flow [2022-12-13 15:57:12,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 777 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:12,401 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 369 flow [2022-12-13 15:57:12,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2022-12-13 15:57:12,402 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -8 predicate places. [2022-12-13 15:57:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 369 flow [2022-12-13 15:57:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:12,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:12,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:57:12,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -510098936, now seen corresponding path program 1 times [2022-12-13 15:57:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147819720] [2022-12-13 15:57:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:12,449 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 15:57:12,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147819720] [2022-12-13 15:57:12,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147819720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:12,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701069401] [2022-12-13 15:57:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:12,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:57:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:57:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:57:12,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 457 [2022-12-13 15:57:12,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:12,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:12,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 457 [2022-12-13 15:57:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:19,705 INFO L130 PetriNetUnfolder]: 81487/128936 cut-off events. [2022-12-13 15:57:19,705 INFO L131 PetriNetUnfolder]: For 31462/31468 co-relation queries the response was YES. [2022-12-13 15:57:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258610 conditions, 128936 events. 81487/128936 cut-off events. For 31462/31468 co-relation queries the response was YES. Maximal size of possible extension queue 5036. Compared 1148481 event pairs, 57651 based on Foata normal form. 3869/100642 useless extension candidates. Maximal degree in co-relation 258603. Up to 90545 conditions per place. [2022-12-13 15:57:20,436 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 108 selfloop transitions, 13 changer transitions 0/177 dead transitions. [2022-12-13 15:57:20,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 177 transitions, 787 flow [2022-12-13 15:57:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2022-12-13 15:57:20,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5718453683442742 [2022-12-13 15:57:20,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2022-12-13 15:57:20,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2022-12-13 15:57:20,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:20,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2022-12-13 15:57:20,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:20,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:20,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:20,442 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 369 flow. Second operand 3 states and 784 transitions. [2022-12-13 15:57:20,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 177 transitions, 787 flow [2022-12-13 15:57:20,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 773 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:20,498 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 485 flow [2022-12-13 15:57:20,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2022-12-13 15:57:20,499 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-12-13 15:57:20,499 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 485 flow [2022-12-13 15:57:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:20,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:20,500 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:20,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:57:20,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1164325929, now seen corresponding path program 1 times [2022-12-13 15:57:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:20,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006788112] [2022-12-13 15:57:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:20,592 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 15:57:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006788112] [2022-12-13 15:57:20,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006788112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:20,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:20,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723986649] [2022-12-13 15:57:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:20,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:57:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:57:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:57:20,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 457 [2022-12-13 15:57:20,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 236.5) internal successors, (946), 4 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:20,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:20,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 457 [2022-12-13 15:57:20,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:26,265 INFO L130 PetriNetUnfolder]: 61299/97585 cut-off events. [2022-12-13 15:57:26,266 INFO L131 PetriNetUnfolder]: For 37745/37769 co-relation queries the response was YES. [2022-12-13 15:57:26,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200340 conditions, 97585 events. 61299/97585 cut-off events. For 37745/37769 co-relation queries the response was YES. Maximal size of possible extension queue 3801. Compared 848471 event pairs, 45967 based on Foata normal form. 4524/77091 useless extension candidates. Maximal degree in co-relation 200332. Up to 77335 conditions per place. [2022-12-13 15:57:26,749 INFO L137 encePairwiseOnDemand]: 455/457 looper letters, 79 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2022-12-13 15:57:26,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 130 transitions, 641 flow [2022-12-13 15:57:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2022-12-13 15:57:26,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5557986870897156 [2022-12-13 15:57:26,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2022-12-13 15:57:26,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2022-12-13 15:57:26,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:26,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2022-12-13 15:57:26,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:26,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:26,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:26,756 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 485 flow. Second operand 3 states and 762 transitions. [2022-12-13 15:57:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 130 transitions, 641 flow [2022-12-13 15:57:26,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 130 transitions, 615 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:26,779 INFO L231 Difference]: Finished difference. Result has 116 places, 130 transitions, 457 flow [2022-12-13 15:57:26,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=116, PETRI_TRANSITIONS=130} [2022-12-13 15:57:26,780 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-12-13 15:57:26,780 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 130 transitions, 457 flow [2022-12-13 15:57:26,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.5) internal successors, (946), 4 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:26,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:26,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:57:26,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash -748758432, now seen corresponding path program 1 times [2022-12-13 15:57:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:26,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537304317] [2022-12-13 15:57:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:26,810 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 15:57:26,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:26,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537304317] [2022-12-13 15:57:26,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537304317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:26,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:26,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855536127] [2022-12-13 15:57:26,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:26,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:26,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:26,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:26,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 457 [2022-12-13 15:57:26,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 130 transitions, 457 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:26,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:26,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 457 [2022-12-13 15:57:26,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:33,203 INFO L130 PetriNetUnfolder]: 70387/111810 cut-off events. [2022-12-13 15:57:33,204 INFO L131 PetriNetUnfolder]: For 34365/34400 co-relation queries the response was YES. [2022-12-13 15:57:33,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228268 conditions, 111810 events. 70387/111810 cut-off events. For 34365/34400 co-relation queries the response was YES. Maximal size of possible extension queue 4276. Compared 988981 event pairs, 50808 based on Foata normal form. 2/84147 useless extension candidates. Maximal degree in co-relation 228260. Up to 73160 conditions per place. [2022-12-13 15:57:33,833 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 115 selfloop transitions, 14 changer transitions 0/181 dead transitions. [2022-12-13 15:57:33,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 181 transitions, 890 flow [2022-12-13 15:57:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2022-12-13 15:57:33,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5820568927789934 [2022-12-13 15:57:33,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2022-12-13 15:57:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2022-12-13 15:57:33,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:33,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2022-12-13 15:57:33,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:33,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:33,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:33,841 INFO L175 Difference]: Start difference. First operand has 116 places, 130 transitions, 457 flow. Second operand 3 states and 798 transitions. [2022-12-13 15:57:33,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 181 transitions, 890 flow [2022-12-13 15:57:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 181 transitions, 889 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:57:33,849 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 597 flow [2022-12-13 15:57:33,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=597, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2022-12-13 15:57:33,850 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -4 predicate places. [2022-12-13 15:57:33,850 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 597 flow [2022-12-13 15:57:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:33,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:33,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:57:33,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -748758431, now seen corresponding path program 1 times [2022-12-13 15:57:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920525521] [2022-12-13 15:57:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:33,897 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 15:57:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920525521] [2022-12-13 15:57:33,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920525521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:33,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:33,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842131800] [2022-12-13 15:57:33,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:33,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:33,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:33,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 457 [2022-12-13 15:57:33,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 597 flow. Second operand has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:33,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:33,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 457 [2022-12-13 15:57:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:40,066 INFO L130 PetriNetUnfolder]: 62381/93229 cut-off events. [2022-12-13 15:57:40,066 INFO L131 PetriNetUnfolder]: For 40207/40448 co-relation queries the response was YES. [2022-12-13 15:57:40,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202684 conditions, 93229 events. 62381/93229 cut-off events. For 40207/40448 co-relation queries the response was YES. Maximal size of possible extension queue 3671. Compared 746937 event pairs, 21811 based on Foata normal form. 1680/68208 useless extension candidates. Maximal degree in co-relation 202675. Up to 69926 conditions per place. [2022-12-13 15:57:40,734 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 107 selfloop transitions, 6 changer transitions 0/169 dead transitions. [2022-12-13 15:57:40,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 954 flow [2022-12-13 15:57:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2022-12-13 15:57:40,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5900802334062728 [2022-12-13 15:57:40,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2022-12-13 15:57:40,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2022-12-13 15:57:40,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:40,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2022-12-13 15:57:40,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:40,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:40,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:40,741 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 597 flow. Second operand 3 states and 809 transitions. [2022-12-13 15:57:40,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 954 flow [2022-12-13 15:57:40,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 169 transitions, 926 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:40,755 INFO L231 Difference]: Finished difference. Result has 117 places, 137 transitions, 577 flow [2022-12-13 15:57:40,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=577, PETRI_PLACES=117, PETRI_TRANSITIONS=137} [2022-12-13 15:57:40,756 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-12-13 15:57:40,756 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 137 transitions, 577 flow [2022-12-13 15:57:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:40,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:40,757 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:40,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:57:40,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1931675664, now seen corresponding path program 1 times [2022-12-13 15:57:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:40,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733988039] [2022-12-13 15:57:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:40,795 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 15:57:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:40,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733988039] [2022-12-13 15:57:40,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733988039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:40,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:40,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70779594] [2022-12-13 15:57:40,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:40,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 457 [2022-12-13 15:57:40,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 137 transitions, 577 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:40,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:40,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 457 [2022-12-13 15:57:40,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:46,174 INFO L130 PetriNetUnfolder]: 54274/88309 cut-off events. [2022-12-13 15:57:46,174 INFO L131 PetriNetUnfolder]: For 39235/39527 co-relation queries the response was YES. [2022-12-13 15:57:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185437 conditions, 88309 events. 54274/88309 cut-off events. For 39235/39527 co-relation queries the response was YES. Maximal size of possible extension queue 3092. Compared 782775 event pairs, 19094 based on Foata normal form. 0/67211 useless extension candidates. Maximal degree in co-relation 185428. Up to 55971 conditions per place. [2022-12-13 15:57:46,662 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 120 selfloop transitions, 15 changer transitions 0/189 dead transitions. [2022-12-13 15:57:46,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 1039 flow [2022-12-13 15:57:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 794 transitions. [2022-12-13 15:57:46,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5791393143690736 [2022-12-13 15:57:46,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 794 transitions. [2022-12-13 15:57:46,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 794 transitions. [2022-12-13 15:57:46,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:46,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 794 transitions. [2022-12-13 15:57:46,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:46,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:46,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:46,668 INFO L175 Difference]: Start difference. First operand has 117 places, 137 transitions, 577 flow. Second operand 3 states and 794 transitions. [2022-12-13 15:57:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 1039 flow [2022-12-13 15:57:46,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 1019 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:46,715 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 722 flow [2022-12-13 15:57:46,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=722, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2022-12-13 15:57:46,716 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -4 predicate places. [2022-12-13 15:57:46,716 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 722 flow [2022-12-13 15:57:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:46,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:46,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:46,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:57:46,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:46,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1931675665, now seen corresponding path program 1 times [2022-12-13 15:57:46,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:46,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376539727] [2022-12-13 15:57:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:46,778 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 15:57:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376539727] [2022-12-13 15:57:46,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376539727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:46,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:46,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:57:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725307473] [2022-12-13 15:57:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:46,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:57:46,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:57:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:57:46,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 457 [2022-12-13 15:57:46,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 722 flow. Second operand has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:46,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:46,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 457 [2022-12-13 15:57:46,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:51,392 INFO L130 PetriNetUnfolder]: 40788/68041 cut-off events. [2022-12-13 15:57:51,393 INFO L131 PetriNetUnfolder]: For 42172/42294 co-relation queries the response was YES. [2022-12-13 15:57:51,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149961 conditions, 68041 events. 40788/68041 cut-off events. For 42172/42294 co-relation queries the response was YES. Maximal size of possible extension queue 2365. Compared 602774 event pairs, 12802 based on Foata normal form. 3404/57059 useless extension candidates. Maximal degree in co-relation 149951. Up to 40739 conditions per place. [2022-12-13 15:57:51,750 INFO L137 encePairwiseOnDemand]: 448/457 looper letters, 140 selfloop transitions, 25 changer transitions 0/218 dead transitions. [2022-12-13 15:57:51,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 218 transitions, 1311 flow [2022-12-13 15:57:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:57:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:57:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1042 transitions. [2022-12-13 15:57:51,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5700218818380745 [2022-12-13 15:57:51,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1042 transitions. [2022-12-13 15:57:51,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1042 transitions. [2022-12-13 15:57:51,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:51,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1042 transitions. [2022-12-13 15:57:51,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 260.5) internal successors, (1042), 4 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:51,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:51,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:51,756 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 722 flow. Second operand 4 states and 1042 transitions. [2022-12-13 15:57:51,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 218 transitions, 1311 flow [2022-12-13 15:57:51,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 218 transitions, 1281 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:51,778 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 738 flow [2022-12-13 15:57:51,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=738, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2022-12-13 15:57:51,778 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2022-12-13 15:57:51,779 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 738 flow [2022-12-13 15:57:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:51,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:51,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:57:51,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1665424680, now seen corresponding path program 1 times [2022-12-13 15:57:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067696329] [2022-12-13 15:57:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:51,818 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 15:57:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067696329] [2022-12-13 15:57:51,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067696329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:51,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:51,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723960921] [2022-12-13 15:57:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:51,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:51,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 457 [2022-12-13 15:57:51,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 738 flow. Second operand 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 15:57:51,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:51,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 457 [2022-12-13 15:57:51,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:57:56,844 INFO L130 PetriNetUnfolder]: 49318/77677 cut-off events. [2022-12-13 15:57:56,844 INFO L131 PetriNetUnfolder]: For 56148/56557 co-relation queries the response was YES. [2022-12-13 15:57:57,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177527 conditions, 77677 events. 49318/77677 cut-off events. For 56148/56557 co-relation queries the response was YES. Maximal size of possible extension queue 2486. Compared 645389 event pairs, 16855 based on Foata normal form. 51/63010 useless extension candidates. Maximal degree in co-relation 177517. Up to 48710 conditions per place. [2022-12-13 15:57:57,248 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 128 selfloop transitions, 21 changer transitions 0/201 dead transitions. [2022-12-13 15:57:57,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 201 transitions, 1274 flow [2022-12-13 15:57:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:57:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:57:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-12-13 15:57:57,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5805981035740335 [2022-12-13 15:57:57,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-12-13 15:57:57,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-12-13 15:57:57,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:57:57,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-12-13 15:57:57,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:57,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:57,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:57,255 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 738 flow. Second operand 3 states and 796 transitions. [2022-12-13 15:57:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 201 transitions, 1274 flow [2022-12-13 15:57:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 201 transitions, 1241 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:57:57,308 INFO L231 Difference]: Finished difference. Result has 120 places, 159 transitions, 937 flow [2022-12-13 15:57:57,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=937, PETRI_PLACES=120, PETRI_TRANSITIONS=159} [2022-12-13 15:57:57,308 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2022-12-13 15:57:57,309 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 159 transitions, 937 flow [2022-12-13 15:57:57,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 15:57:57,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:57:57,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:57:57,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:57:57,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:57:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:57:57,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1665424679, now seen corresponding path program 1 times [2022-12-13 15:57:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:57:57,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187570898] [2022-12-13 15:57:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:57:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:57:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:57:57,368 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 15:57:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:57:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187570898] [2022-12-13 15:57:57,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187570898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:57:57,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:57:57,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:57:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581200612] [2022-12-13 15:57:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:57:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:57:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:57:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:57:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:57:57,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 457 [2022-12-13 15:57:57,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 159 transitions, 937 flow. Second operand has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:57:57,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:57:57,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 457 [2022-12-13 15:57:57,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:01,935 INFO L130 PetriNetUnfolder]: 43740/69823 cut-off events. [2022-12-13 15:58:01,935 INFO L131 PetriNetUnfolder]: For 63336/63751 co-relation queries the response was YES. [2022-12-13 15:58:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163740 conditions, 69823 events. 43740/69823 cut-off events. For 63336/63751 co-relation queries the response was YES. Maximal size of possible extension queue 2237. Compared 583318 event pairs, 16765 based on Foata normal form. 1783/58744 useless extension candidates. Maximal degree in co-relation 163729. Up to 52063 conditions per place. [2022-12-13 15:58:02,553 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 125 selfloop transitions, 12 changer transitions 0/193 dead transitions. [2022-12-13 15:58:02,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 193 transitions, 1397 flow [2022-12-13 15:58:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:58:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:58:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2022-12-13 15:58:02,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5893508388037928 [2022-12-13 15:58:02,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2022-12-13 15:58:02,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2022-12-13 15:58:02,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:02,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2022-12-13 15:58:02,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:02,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:02,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:02,559 INFO L175 Difference]: Start difference. First operand has 120 places, 159 transitions, 937 flow. Second operand 3 states and 808 transitions. [2022-12-13 15:58:02,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 193 transitions, 1397 flow [2022-12-13 15:58:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 1355 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:58:02,575 INFO L231 Difference]: Finished difference. Result has 118 places, 157 transitions, 915 flow [2022-12-13 15:58:02,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=915, PETRI_PLACES=118, PETRI_TRANSITIONS=157} [2022-12-13 15:58:02,576 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2022-12-13 15:58:02,576 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 157 transitions, 915 flow [2022-12-13 15:58:02,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:02,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:02,576 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, 1, 1] [2022-12-13 15:58:02,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:58:02,577 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash 697458018, now seen corresponding path program 1 times [2022-12-13 15:58:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:02,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342014719] [2022-12-13 15:58:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:58:02,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342014719] [2022-12-13 15:58:02,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342014719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:02,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:02,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:58:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729209968] [2022-12-13 15:58:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:02,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:58:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:58:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:58:02,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 457 [2022-12-13 15:58:02,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 157 transitions, 915 flow. Second operand has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:02,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:02,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 457 [2022-12-13 15:58:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:07,646 INFO L130 PetriNetUnfolder]: 43751/71205 cut-off events. [2022-12-13 15:58:07,646 INFO L131 PetriNetUnfolder]: For 62417/62825 co-relation queries the response was YES. [2022-12-13 15:58:07,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164900 conditions, 71205 events. 43751/71205 cut-off events. For 62417/62825 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 608299 event pairs, 26425 based on Foata normal form. 0/57697 useless extension candidates. Maximal degree in co-relation 164889. Up to 38518 conditions per place. [2022-12-13 15:58:08,074 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 149 selfloop transitions, 37 changer transitions 0/238 dead transitions. [2022-12-13 15:58:08,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 238 transitions, 1605 flow [2022-12-13 15:58:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:58:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:58:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2022-12-13 15:58:08,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5650984682713348 [2022-12-13 15:58:08,077 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2022-12-13 15:58:08,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2022-12-13 15:58:08,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:08,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2022-12-13 15:58:08,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:08,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:08,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:08,081 INFO L175 Difference]: Start difference. First operand has 118 places, 157 transitions, 915 flow. Second operand 4 states and 1033 transitions. [2022-12-13 15:58:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 238 transitions, 1605 flow [2022-12-13 15:58:08,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 238 transitions, 1581 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:58:08,117 INFO L231 Difference]: Finished difference. Result has 122 places, 170 transitions, 1189 flow [2022-12-13 15:58:08,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1189, PETRI_PLACES=122, PETRI_TRANSITIONS=170} [2022-12-13 15:58:08,117 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -1 predicate places. [2022-12-13 15:58:08,117 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 170 transitions, 1189 flow [2022-12-13 15:58:08,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:08,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:08,118 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, 1, 1, 1] [2022-12-13 15:58:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 15:58:08,118 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 434516672, now seen corresponding path program 1 times [2022-12-13 15:58:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:08,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102439023] [2022-12-13 15:58:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:08,246 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 15:58:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102439023] [2022-12-13 15:58:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102439023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:08,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:08,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:58:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501235441] [2022-12-13 15:58:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:58:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:58:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:58:08,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 457 [2022-12-13 15:58:08,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 170 transitions, 1189 flow. Second operand has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:08,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:08,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 457 [2022-12-13 15:58:08,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:13,146 INFO L130 PetriNetUnfolder]: 42689/65742 cut-off events. [2022-12-13 15:58:13,146 INFO L131 PetriNetUnfolder]: For 76661/76955 co-relation queries the response was YES. [2022-12-13 15:58:13,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160358 conditions, 65742 events. 42689/65742 cut-off events. For 76661/76955 co-relation queries the response was YES. Maximal size of possible extension queue 2161. Compared 523962 event pairs, 14489 based on Foata normal form. 591/51904 useless extension candidates. Maximal degree in co-relation 160345. Up to 38240 conditions per place. [2022-12-13 15:58:13,478 INFO L137 encePairwiseOnDemand]: 448/457 looper letters, 148 selfloop transitions, 44 changer transitions 0/240 dead transitions. [2022-12-13 15:58:13,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 1780 flow [2022-12-13 15:58:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:58:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:58:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1243 transitions. [2022-12-13 15:58:13,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5439824945295405 [2022-12-13 15:58:13,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1243 transitions. [2022-12-13 15:58:13,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1243 transitions. [2022-12-13 15:58:13,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:13,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1243 transitions. [2022-12-13 15:58:13,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:13,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:13,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:13,485 INFO L175 Difference]: Start difference. First operand has 122 places, 170 transitions, 1189 flow. Second operand 5 states and 1243 transitions. [2022-12-13 15:58:13,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 1780 flow [2022-12-13 15:58:13,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 240 transitions, 1768 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 15:58:13,528 INFO L231 Difference]: Finished difference. Result has 128 places, 172 transitions, 1350 flow [2022-12-13 15:58:13,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1350, PETRI_PLACES=128, PETRI_TRANSITIONS=172} [2022-12-13 15:58:13,528 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 5 predicate places. [2022-12-13 15:58:13,528 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 172 transitions, 1350 flow [2022-12-13 15:58:13,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:13,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:13,529 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, 1, 1, 1, 1] [2022-12-13 15:58:13,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:58:13,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 99119577, now seen corresponding path program 1 times [2022-12-13 15:58:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696004207] [2022-12-13 15:58:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:13,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:13,704 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 15:58:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696004207] [2022-12-13 15:58:13,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696004207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:13,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:13,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:58:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767418943] [2022-12-13 15:58:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:58:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:58:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:58:13,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 457 [2022-12-13 15:58:13,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 172 transitions, 1350 flow. Second operand has 8 states, 8 states have (on average 218.625) internal successors, (1749), 8 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:13,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:13,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 457 [2022-12-13 15:58:13,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:19,630 INFO L130 PetriNetUnfolder]: 46731/75192 cut-off events. [2022-12-13 15:58:19,630 INFO L131 PetriNetUnfolder]: For 99139/99253 co-relation queries the response was YES. [2022-12-13 15:58:19,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179171 conditions, 75192 events. 46731/75192 cut-off events. For 99139/99253 co-relation queries the response was YES. Maximal size of possible extension queue 2471. Compared 640625 event pairs, 27711 based on Foata normal form. 255/62738 useless extension candidates. Maximal degree in co-relation 179155. Up to 41116 conditions per place. [2022-12-13 15:58:20,042 INFO L137 encePairwiseOnDemand]: 446/457 looper letters, 238 selfloop transitions, 59 changer transitions 0/344 dead transitions. [2022-12-13 15:58:20,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 344 transitions, 2532 flow [2022-12-13 15:58:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:58:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:58:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1959 transitions. [2022-12-13 15:58:20,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5358315098468271 [2022-12-13 15:58:20,046 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1959 transitions. [2022-12-13 15:58:20,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1959 transitions. [2022-12-13 15:58:20,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:20,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1959 transitions. [2022-12-13 15:58:20,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,052 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,052 INFO L175 Difference]: Start difference. First operand has 128 places, 172 transitions, 1350 flow. Second operand 8 states and 1959 transitions. [2022-12-13 15:58:20,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 344 transitions, 2532 flow [2022-12-13 15:58:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 344 transitions, 2492 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 15:58:20,169 INFO L231 Difference]: Finished difference. Result has 138 places, 186 transitions, 1684 flow [2022-12-13 15:58:20,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1684, PETRI_PLACES=138, PETRI_TRANSITIONS=186} [2022-12-13 15:58:20,170 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-12-13 15:58:20,170 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 186 transitions, 1684 flow [2022-12-13 15:58:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.625) internal successors, (1749), 8 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:20,171 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, 1, 1, 1, 1] [2022-12-13 15:58:20,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:58:20,171 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1097760908, now seen corresponding path program 1 times [2022-12-13 15:58:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385624634] [2022-12-13 15:58:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:20,332 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 15:58:20,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385624634] [2022-12-13 15:58:20,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385624634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:20,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:20,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:58:20,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055795345] [2022-12-13 15:58:20,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:58:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:58:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:58:20,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 457 [2022-12-13 15:58:20,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 186 transitions, 1684 flow. Second operand has 7 states, 7 states have (on average 218.85714285714286) internal successors, (1532), 7 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:20,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:20,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 457 [2022-12-13 15:58:20,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:26,268 INFO L130 PetriNetUnfolder]: 43148/69368 cut-off events. [2022-12-13 15:58:26,268 INFO L131 PetriNetUnfolder]: For 118744/118934 co-relation queries the response was YES. [2022-12-13 15:58:26,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172883 conditions, 69368 events. 43148/69368 cut-off events. For 118744/118934 co-relation queries the response was YES. Maximal size of possible extension queue 2225. Compared 584338 event pairs, 11806 based on Foata normal form. 234/58005 useless extension candidates. Maximal degree in co-relation 172863. Up to 35238 conditions per place. [2022-12-13 15:58:26,793 INFO L137 encePairwiseOnDemand]: 445/457 looper letters, 262 selfloop transitions, 76 changer transitions 0/393 dead transitions. [2022-12-13 15:58:26,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 393 transitions, 3318 flow [2022-12-13 15:58:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:58:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:58:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2629 transitions. [2022-12-13 15:58:26,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5229759299781181 [2022-12-13 15:58:26,797 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2629 transitions. [2022-12-13 15:58:26,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2629 transitions. [2022-12-13 15:58:26,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:26,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2629 transitions. [2022-12-13 15:58:26,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 239.0) internal successors, (2629), 11 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:26,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:26,997 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:26,997 INFO L175 Difference]: Start difference. First operand has 138 places, 186 transitions, 1684 flow. Second operand 11 states and 2629 transitions. [2022-12-13 15:58:26,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 393 transitions, 3318 flow [2022-12-13 15:58:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 393 transitions, 3278 flow, removed 20 selfloop flow, removed 0 redundant places. [2022-12-13 15:58:27,240 INFO L231 Difference]: Finished difference. Result has 154 places, 218 transitions, 2394 flow [2022-12-13 15:58:27,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2394, PETRI_PLACES=154, PETRI_TRANSITIONS=218} [2022-12-13 15:58:27,240 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 31 predicate places. [2022-12-13 15:58:27,240 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 218 transitions, 2394 flow [2022-12-13 15:58:27,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 218.85714285714286) internal successors, (1532), 7 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:27,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:27,241 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, 1, 1, 1, 1, 1] [2022-12-13 15:58:27,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:58:27,241 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1870490247, now seen corresponding path program 1 times [2022-12-13 15:58:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327991796] [2022-12-13 15:58:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:27,373 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 15:58:27,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:27,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327991796] [2022-12-13 15:58:27,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327991796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:27,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:27,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:58:27,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602971438] [2022-12-13 15:58:27,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:27,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:58:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:58:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:58:27,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 457 [2022-12-13 15:58:27,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 218 transitions, 2394 flow. Second operand has 8 states, 8 states have (on average 220.375) internal successors, (1763), 8 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:27,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:27,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 457 [2022-12-13 15:58:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:33,634 INFO L130 PetriNetUnfolder]: 41678/66923 cut-off events. [2022-12-13 15:58:33,634 INFO L131 PetriNetUnfolder]: For 157129/157416 co-relation queries the response was YES. [2022-12-13 15:58:33,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173709 conditions, 66923 events. 41678/66923 cut-off events. For 157129/157416 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 561284 event pairs, 26863 based on Foata normal form. 259/54616 useless extension candidates. Maximal degree in co-relation 173683. Up to 37476 conditions per place. [2022-12-13 15:58:34,191 INFO L137 encePairwiseOnDemand]: 444/457 looper letters, 186 selfloop transitions, 87 changer transitions 0/331 dead transitions. [2022-12-13 15:58:34,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 331 transitions, 3395 flow [2022-12-13 15:58:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:58:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:58:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1921 transitions. [2022-12-13 15:58:34,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5254376367614879 [2022-12-13 15:58:34,195 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1921 transitions. [2022-12-13 15:58:34,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1921 transitions. [2022-12-13 15:58:34,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:34,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1921 transitions. [2022-12-13 15:58:34,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 240.125) internal successors, (1921), 8 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:34,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:34,201 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:34,201 INFO L175 Difference]: Start difference. First operand has 154 places, 218 transitions, 2394 flow. Second operand 8 states and 1921 transitions. [2022-12-13 15:58:34,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 331 transitions, 3395 flow [2022-12-13 15:58:34,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 331 transitions, 3321 flow, removed 37 selfloop flow, removed 0 redundant places. [2022-12-13 15:58:34,538 INFO L231 Difference]: Finished difference. Result has 165 places, 231 transitions, 2819 flow [2022-12-13 15:58:34,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2819, PETRI_PLACES=165, PETRI_TRANSITIONS=231} [2022-12-13 15:58:34,538 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 42 predicate places. [2022-12-13 15:58:34,538 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 231 transitions, 2819 flow [2022-12-13 15:58:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.375) internal successors, (1763), 8 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:34,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:34,539 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, 1, 1, 1, 1, 1] [2022-12-13 15:58:34,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:58:34,539 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash 329151751, now seen corresponding path program 1 times [2022-12-13 15:58:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778545621] [2022-12-13 15:58:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:34,660 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 15:58:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778545621] [2022-12-13 15:58:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778545621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:34,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:34,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:58:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229251215] [2022-12-13 15:58:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:58:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:58:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:58:34,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 457 [2022-12-13 15:58:34,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 231 transitions, 2819 flow. Second operand has 7 states, 7 states have (on average 220.71428571428572) internal successors, (1545), 7 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:34,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:34,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 457 [2022-12-13 15:58:34,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:40,941 INFO L130 PetriNetUnfolder]: 41773/67742 cut-off events. [2022-12-13 15:58:40,941 INFO L131 PetriNetUnfolder]: For 191716/191903 co-relation queries the response was YES. [2022-12-13 15:58:41,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177318 conditions, 67742 events. 41773/67742 cut-off events. For 191716/191903 co-relation queries the response was YES. Maximal size of possible extension queue 2196. Compared 574808 event pairs, 12021 based on Foata normal form. 243/56613 useless extension candidates. Maximal degree in co-relation 177288. Up to 37134 conditions per place. [2022-12-13 15:58:41,582 INFO L137 encePairwiseOnDemand]: 443/457 looper letters, 223 selfloop transitions, 96 changer transitions 0/381 dead transitions. [2022-12-13 15:58:41,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 381 transitions, 4209 flow [2022-12-13 15:58:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:58:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:58:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2171 transitions. [2022-12-13 15:58:41,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278385606613177 [2022-12-13 15:58:41,586 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2171 transitions. [2022-12-13 15:58:41,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2171 transitions. [2022-12-13 15:58:41,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:41,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2171 transitions. [2022-12-13 15:58:41,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 241.22222222222223) internal successors, (2171), 9 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,592 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:41,592 INFO L175 Difference]: Start difference. First operand has 165 places, 231 transitions, 2819 flow. Second operand 9 states and 2171 transitions. [2022-12-13 15:58:41,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 381 transitions, 4209 flow [2022-12-13 15:58:42,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 381 transitions, 4153 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 15:58:42,205 INFO L231 Difference]: Finished difference. Result has 174 places, 248 transitions, 3447 flow [2022-12-13 15:58:42,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3447, PETRI_PLACES=174, PETRI_TRANSITIONS=248} [2022-12-13 15:58:42,206 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 51 predicate places. [2022-12-13 15:58:42,206 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 248 transitions, 3447 flow [2022-12-13 15:58:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 220.71428571428572) internal successors, (1545), 7 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:42,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:42,206 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:58:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:58:42,206 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1554287003, now seen corresponding path program 1 times [2022-12-13 15:58:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993087039] [2022-12-13 15:58:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:42,290 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 15:58:42,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:42,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993087039] [2022-12-13 15:58:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993087039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:42,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:42,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:58:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125411395] [2022-12-13 15:58:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:42,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:58:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:58:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:58:42,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 457 [2022-12-13 15:58:42,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 248 transitions, 3447 flow. Second operand has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:42,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:42,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 457 [2022-12-13 15:58:42,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:58:48,777 INFO L130 PetriNetUnfolder]: 41770/68776 cut-off events. [2022-12-13 15:58:48,777 INFO L131 PetriNetUnfolder]: For 227636/227896 co-relation queries the response was YES. [2022-12-13 15:58:49,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182761 conditions, 68776 events. 41770/68776 cut-off events. For 227636/227896 co-relation queries the response was YES. Maximal size of possible extension queue 2206. Compared 594240 event pairs, 12605 based on Foata normal form. 276/57558 useless extension candidates. Maximal degree in co-relation 182728. Up to 35691 conditions per place. [2022-12-13 15:58:49,376 INFO L137 encePairwiseOnDemand]: 443/457 looper letters, 200 selfloop transitions, 97 changer transitions 0/357 dead transitions. [2022-12-13 15:58:49,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 357 transitions, 4600 flow [2022-12-13 15:58:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:58:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:58:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1519 transitions. [2022-12-13 15:58:49,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5539752005835157 [2022-12-13 15:58:49,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1519 transitions. [2022-12-13 15:58:49,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1519 transitions. [2022-12-13 15:58:49,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:58:49,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1519 transitions. [2022-12-13 15:58:49,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.16666666666666) internal successors, (1519), 6 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:49,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:49,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:49,384 INFO L175 Difference]: Start difference. First operand has 174 places, 248 transitions, 3447 flow. Second operand 6 states and 1519 transitions. [2022-12-13 15:58:49,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 357 transitions, 4600 flow [2022-12-13 15:58:50,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 357 transitions, 4530 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-13 15:58:50,230 INFO L231 Difference]: Finished difference. Result has 178 places, 260 transitions, 3981 flow [2022-12-13 15:58:50,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3981, PETRI_PLACES=178, PETRI_TRANSITIONS=260} [2022-12-13 15:58:50,231 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 55 predicate places. [2022-12-13 15:58:50,231 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 260 transitions, 3981 flow [2022-12-13 15:58:50,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:50,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:58:50,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:58:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:58:50,232 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:58:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:58:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1365997477, now seen corresponding path program 1 times [2022-12-13 15:58:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:58:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911557958] [2022-12-13 15:58:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:58:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:58:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:58:50,345 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 15:58:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:58:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911557958] [2022-12-13 15:58:50,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911557958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:58:50,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:58:50,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:58:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172781493] [2022-12-13 15:58:50,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:58:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:58:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:58:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:58:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:58:50,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 457 [2022-12-13 15:58:50,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 260 transitions, 3981 flow. Second operand has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:58:50,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:58:50,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 457 [2022-12-13 15:58:50,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:59:03,463 INFO L130 PetriNetUnfolder]: 84397/130826 cut-off events. [2022-12-13 15:59:03,463 INFO L131 PetriNetUnfolder]: For 437330/437498 co-relation queries the response was YES. [2022-12-13 15:59:04,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350182 conditions, 130826 events. 84397/130826 cut-off events. For 437330/437498 co-relation queries the response was YES. Maximal size of possible extension queue 4610. Compared 1138034 event pairs, 25826 based on Foata normal form. 398/107274 useless extension candidates. Maximal degree in co-relation 350146. Up to 40838 conditions per place. [2022-12-13 15:59:04,637 INFO L137 encePairwiseOnDemand]: 440/457 looper letters, 316 selfloop transitions, 137 changer transitions 0/499 dead transitions. [2022-12-13 15:59:04,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 499 transitions, 6827 flow [2022-12-13 15:59:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:59:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:59:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2022-12-13 15:59:04,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5429127157792366 [2022-12-13 15:59:04,641 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2022-12-13 15:59:04,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2022-12-13 15:59:04,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:59:04,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2022-12-13 15:59:04,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.11111111111111) internal successors, (2233), 9 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:04,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:04,648 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:04,649 INFO L175 Difference]: Start difference. First operand has 178 places, 260 transitions, 3981 flow. Second operand 9 states and 2233 transitions. [2022-12-13 15:59:04,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 499 transitions, 6827 flow [2022-12-13 15:59:07,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 499 transitions, 6751 flow, removed 38 selfloop flow, removed 0 redundant places. [2022-12-13 15:59:07,540 INFO L231 Difference]: Finished difference. Result has 191 places, 319 transitions, 5862 flow [2022-12-13 15:59:07,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5862, PETRI_PLACES=191, PETRI_TRANSITIONS=319} [2022-12-13 15:59:07,541 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 68 predicate places. [2022-12-13 15:59:07,541 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 319 transitions, 5862 flow [2022-12-13 15:59:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:07,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:59:07,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:59:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:59:07,541 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:59:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:59:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1357601105, now seen corresponding path program 2 times [2022-12-13 15:59:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:59:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619642971] [2022-12-13 15:59:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:59:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:59:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:59:07,657 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 15:59:07,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:59:07,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619642971] [2022-12-13 15:59:07,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619642971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:59:07,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:59:07,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:59:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332202120] [2022-12-13 15:59:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:59:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:59:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:59:07,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:59:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:59:07,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 457 [2022-12-13 15:59:07,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 319 transitions, 5862 flow. Second operand has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:07,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:59:07,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 457 [2022-12-13 15:59:07,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:59:23,008 INFO L130 PetriNetUnfolder]: 86668/135824 cut-off events. [2022-12-13 15:59:23,009 INFO L131 PetriNetUnfolder]: For 563905/563993 co-relation queries the response was YES. [2022-12-13 15:59:23,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376627 conditions, 135824 events. 86668/135824 cut-off events. For 563905/563993 co-relation queries the response was YES. Maximal size of possible extension queue 4641. Compared 1203010 event pairs, 24780 based on Foata normal form. 404/111978 useless extension candidates. Maximal degree in co-relation 376586. Up to 81439 conditions per place. [2022-12-13 15:59:24,342 INFO L137 encePairwiseOnDemand]: 438/457 looper letters, 351 selfloop transitions, 196 changer transitions 0/593 dead transitions. [2022-12-13 15:59:24,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 593 transitions, 8729 flow [2022-12-13 15:59:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:59:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:59:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2956 transitions. [2022-12-13 15:59:24,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5390226112326769 [2022-12-13 15:59:24,346 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2956 transitions. [2022-12-13 15:59:24,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2956 transitions. [2022-12-13 15:59:24,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:59:24,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2956 transitions. [2022-12-13 15:59:24,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 246.33333333333334) internal successors, (2956), 12 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:24,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:24,355 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:24,355 INFO L175 Difference]: Start difference. First operand has 191 places, 319 transitions, 5862 flow. Second operand 12 states and 2956 transitions. [2022-12-13 15:59:24,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 593 transitions, 8729 flow [2022-12-13 15:59:28,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 593 transitions, 8646 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:59:28,230 INFO L231 Difference]: Finished difference. Result has 206 places, 363 transitions, 7465 flow [2022-12-13 15:59:28,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7465, PETRI_PLACES=206, PETRI_TRANSITIONS=363} [2022-12-13 15:59:28,230 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 83 predicate places. [2022-12-13 15:59:28,230 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 363 transitions, 7465 flow [2022-12-13 15:59:28,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:28,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:59:28,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:59:28,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 15:59:28,231 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 15:59:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:59:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1097621808, now seen corresponding path program 1 times [2022-12-13 15:59:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:59:28,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26121431] [2022-12-13 15:59:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:59:28,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:59:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:59:28,339 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 15:59:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:59:28,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26121431] [2022-12-13 15:59:28,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26121431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:59:28,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:59:28,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:59:28,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664570682] [2022-12-13 15:59:28,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:59:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:59:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:59:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:59:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:59:28,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 457 [2022-12-13 15:59:28,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 363 transitions, 7465 flow. Second operand has 6 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:28,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:59:28,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 457 [2022-12-13 15:59:28,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:59:53,381 INFO L130 PetriNetUnfolder]: 137019/216589 cut-off events. [2022-12-13 15:59:53,381 INFO L131 PetriNetUnfolder]: For 845511/846051 co-relation queries the response was YES. [2022-12-13 15:59:55,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577435 conditions, 216589 events. 137019/216589 cut-off events. For 845511/846051 co-relation queries the response was YES. Maximal size of possible extension queue 8239. Compared 2052823 event pairs, 66474 based on Foata normal form. 148/176566 useless extension candidates. Maximal degree in co-relation 577388. Up to 72833 conditions per place. [2022-12-13 15:59:56,065 INFO L137 encePairwiseOnDemand]: 447/457 looper letters, 369 selfloop transitions, 108 changer transitions 0/545 dead transitions. [2022-12-13 15:59:56,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 545 transitions, 10176 flow [2022-12-13 15:59:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:59:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:59:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1540 transitions. [2022-12-13 15:59:56,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5616338439095551 [2022-12-13 15:59:56,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1540 transitions. [2022-12-13 15:59:56,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1540 transitions. [2022-12-13 15:59:56,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:59:56,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1540 transitions. [2022-12-13 15:59:56,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.6666666666667) internal successors, (1540), 6 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:56,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:56,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:59:56,077 INFO L175 Difference]: Start difference. First operand has 206 places, 363 transitions, 7465 flow. Second operand 6 states and 1540 transitions. [2022-12-13 15:59:56,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 545 transitions, 10176 flow [2022-12-13 16:00:01,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 545 transitions, 10038 flow, removed 57 selfloop flow, removed 2 redundant places. [2022-12-13 16:00:01,021 INFO L231 Difference]: Finished difference. Result has 212 places, 415 transitions, 9194 flow [2022-12-13 16:00:01,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9194, PETRI_PLACES=212, PETRI_TRANSITIONS=415} [2022-12-13 16:00:01,022 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 89 predicate places. [2022-12-13 16:00:01,022 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 415 transitions, 9194 flow [2022-12-13 16:00:01,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:01,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:00:01,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:00:01,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 16:00:01,022 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:00:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:00:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2043498811, now seen corresponding path program 3 times [2022-12-13 16:00:01,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:00:01,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332900506] [2022-12-13 16:00:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:00:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:00:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:00:01,144 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 16:00:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:00:01,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332900506] [2022-12-13 16:00:01,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332900506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:00:01,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:00:01,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:00:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42799524] [2022-12-13 16:00:01,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:00:01,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:00:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:00:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:00:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:00:01,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 457 [2022-12-13 16:00:01,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 415 transitions, 9194 flow. Second operand has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:01,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:00:01,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 457 [2022-12-13 16:00:01,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:00:27,773 INFO L130 PetriNetUnfolder]: 136931/220007 cut-off events. [2022-12-13 16:00:27,773 INFO L131 PetriNetUnfolder]: For 930257/930932 co-relation queries the response was YES. [2022-12-13 16:00:29,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586225 conditions, 220007 events. 136931/220007 cut-off events. For 930257/930932 co-relation queries the response was YES. Maximal size of possible extension queue 8358. Compared 2139375 event pairs, 67296 based on Foata normal form. 351/177424 useless extension candidates. Maximal degree in co-relation 586175. Up to 105530 conditions per place. [2022-12-13 16:00:30,420 INFO L137 encePairwiseOnDemand]: 444/457 looper letters, 300 selfloop transitions, 207 changer transitions 0/569 dead transitions. [2022-12-13 16:00:30,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 569 transitions, 10718 flow [2022-12-13 16:00:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:00:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:00:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2000 transitions. [2022-12-13 16:00:30,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5470459518599562 [2022-12-13 16:00:30,424 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2000 transitions. [2022-12-13 16:00:30,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2000 transitions. [2022-12-13 16:00:30,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:00:30,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2000 transitions. [2022-12-13 16:00:30,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:30,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:30,429 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:30,429 INFO L175 Difference]: Start difference. First operand has 212 places, 415 transitions, 9194 flow. Second operand 8 states and 2000 transitions. [2022-12-13 16:00:30,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 569 transitions, 10718 flow [2022-12-13 16:00:36,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 569 transitions, 10640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:00:36,208 INFO L231 Difference]: Finished difference. Result has 215 places, 410 transitions, 9467 flow [2022-12-13 16:00:36,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=9053, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9467, PETRI_PLACES=215, PETRI_TRANSITIONS=410} [2022-12-13 16:00:36,208 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 92 predicate places. [2022-12-13 16:00:36,208 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 410 transitions, 9467 flow [2022-12-13 16:00:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:36,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:00:36,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:00:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 16:00:36,209 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:00:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:00:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2048671270, now seen corresponding path program 2 times [2022-12-13 16:00:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:00:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92700740] [2022-12-13 16:00:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:00:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:00:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:00:36,324 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 16:00:36,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:00:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92700740] [2022-12-13 16:00:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92700740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:00:36,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:00:36,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:00:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118977253] [2022-12-13 16:00:36,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:00:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:00:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:00:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:00:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:00:36,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 457 [2022-12-13 16:00:36,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 410 transitions, 9467 flow. Second operand has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:00:36,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:00:36,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 457 [2022-12-13 16:00:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:01:13,052 INFO L130 PetriNetUnfolder]: 191256/292720 cut-off events. [2022-12-13 16:01:13,052 INFO L131 PetriNetUnfolder]: For 1260252/1260496 co-relation queries the response was YES. [2022-12-13 16:01:15,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786217 conditions, 292720 events. 191256/292720 cut-off events. For 1260252/1260496 co-relation queries the response was YES. Maximal size of possible extension queue 10611. Compared 2728581 event pairs, 55127 based on Foata normal form. 318/238462 useless extension candidates. Maximal degree in co-relation 786167. Up to 158250 conditions per place. [2022-12-13 16:01:16,551 INFO L137 encePairwiseOnDemand]: 441/457 looper letters, 365 selfloop transitions, 248 changer transitions 0/671 dead transitions. [2022-12-13 16:01:16,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 671 transitions, 13790 flow [2022-12-13 16:01:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:01:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:01:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2022-12-13 16:01:16,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5429127157792366 [2022-12-13 16:01:16,556 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2022-12-13 16:01:16,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2022-12-13 16:01:16,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:01:16,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2022-12-13 16:01:16,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.11111111111111) internal successors, (2233), 9 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:16,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:16,563 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:16,564 INFO L175 Difference]: Start difference. First operand has 215 places, 410 transitions, 9467 flow. Second operand 9 states and 2233 transitions. [2022-12-13 16:01:16,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 671 transitions, 13790 flow [2022-12-13 16:01:25,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 671 transitions, 13471 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-12-13 16:01:25,281 INFO L231 Difference]: Finished difference. Result has 222 places, 493 transitions, 12727 flow [2022-12-13 16:01:25,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=9084, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12727, PETRI_PLACES=222, PETRI_TRANSITIONS=493} [2022-12-13 16:01:25,281 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 99 predicate places. [2022-12-13 16:01:25,282 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 493 transitions, 12727 flow [2022-12-13 16:01:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:25,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:01:25,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 16:01:25,282 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:01:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1000745458, now seen corresponding path program 3 times [2022-12-13 16:01:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982467671] [2022-12-13 16:01:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:25,401 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 16:01:25,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982467671] [2022-12-13 16:01:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982467671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:01:25,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:01:25,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:01:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627942692] [2022-12-13 16:01:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:01:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:01:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:01:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:01:25,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 457 [2022-12-13 16:01:25,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 493 transitions, 12727 flow. Second operand has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:25,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:01:25,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 457 [2022-12-13 16:01:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:02:02,153 INFO L130 PetriNetUnfolder]: 171839/270512 cut-off events. [2022-12-13 16:02:02,153 INFO L131 PetriNetUnfolder]: For 1514396/1514974 co-relation queries the response was YES. [2022-12-13 16:02:04,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784338 conditions, 270512 events. 171839/270512 cut-off events. For 1514396/1514974 co-relation queries the response was YES. Maximal size of possible extension queue 10385. Compared 2616380 event pairs, 89539 based on Foata normal form. 156/217211 useless extension candidates. Maximal degree in co-relation 784284. Up to 105530 conditions per place. [2022-12-13 16:02:05,752 INFO L137 encePairwiseOnDemand]: 444/457 looper letters, 320 selfloop transitions, 312 changer transitions 0/696 dead transitions. [2022-12-13 16:02:05,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 696 transitions, 16090 flow [2022-12-13 16:02:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:02:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:02:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2000 transitions. [2022-12-13 16:02:05,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5470459518599562 [2022-12-13 16:02:05,758 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2000 transitions. [2022-12-13 16:02:05,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2000 transitions. [2022-12-13 16:02:05,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:02:05,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2000 transitions. [2022-12-13 16:02:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:05,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:05,764 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:05,764 INFO L175 Difference]: Start difference. First operand has 222 places, 493 transitions, 12727 flow. Second operand 8 states and 2000 transitions. [2022-12-13 16:02:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 696 transitions, 16090 flow [2022-12-13 16:02:15,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 696 transitions, 16060 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-12-13 16:02:15,102 INFO L231 Difference]: Finished difference. Result has 231 places, 535 transitions, 15140 flow [2022-12-13 16:02:15,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=12699, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15140, PETRI_PLACES=231, PETRI_TRANSITIONS=535} [2022-12-13 16:02:15,102 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 108 predicate places. [2022-12-13 16:02:15,102 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 535 transitions, 15140 flow [2022-12-13 16:02:15,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:15,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:02:15,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:02:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 16:02:15,103 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:02:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:02:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1864777358, now seen corresponding path program 4 times [2022-12-13 16:02:15,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:02:15,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819968846] [2022-12-13 16:02:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:02:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:02:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:02:15,212 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 16:02:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:02:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819968846] [2022-12-13 16:02:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819968846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:02:15,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:02:15,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:02:15,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588124267] [2022-12-13 16:02:15,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:02:15,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:02:15,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:02:15,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:02:15,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:02:15,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 457 [2022-12-13 16:02:15,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 535 transitions, 15140 flow. Second operand has 8 states, 8 states have (on average 221.875) internal successors, (1775), 8 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:02:15,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:02:15,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 457 [2022-12-13 16:02:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:03:00,865 INFO L130 PetriNetUnfolder]: 201965/308031 cut-off events. [2022-12-13 16:03:00,865 INFO L131 PetriNetUnfolder]: For 1909811/1910037 co-relation queries the response was YES. [2022-12-13 16:03:03,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913561 conditions, 308031 events. 201965/308031 cut-off events. For 1909811/1910037 co-relation queries the response was YES. Maximal size of possible extension queue 11123. Compared 2869951 event pairs, 90559 based on Foata normal form. 160/245961 useless extension candidates. Maximal degree in co-relation 913505. Up to 202036 conditions per place. [2022-12-13 16:03:05,164 INFO L137 encePairwiseOnDemand]: 440/457 looper letters, 445 selfloop transitions, 403 changer transitions 0/906 dead transitions. [2022-12-13 16:03:05,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 906 transitions, 20581 flow [2022-12-13 16:03:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:03:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 16:03:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3440 transitions. [2022-12-13 16:03:05,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5376680212566427 [2022-12-13 16:03:05,170 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3440 transitions. [2022-12-13 16:03:05,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3440 transitions. [2022-12-13 16:03:05,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:03:05,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3440 transitions. [2022-12-13 16:03:05,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 245.71428571428572) internal successors, (3440), 14 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:05,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:05,179 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:05,179 INFO L175 Difference]: Start difference. First operand has 231 places, 535 transitions, 15140 flow. Second operand 14 states and 3440 transitions. [2022-12-13 16:03:05,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 906 transitions, 20581 flow [2022-12-13 16:03:24,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 906 transitions, 19874 flow, removed 26 selfloop flow, removed 3 redundant places. [2022-12-13 16:03:24,057 INFO L231 Difference]: Finished difference. Result has 246 places, 613 transitions, 17994 flow [2022-12-13 16:03:24,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=14503, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17994, PETRI_PLACES=246, PETRI_TRANSITIONS=613} [2022-12-13 16:03:24,057 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 123 predicate places. [2022-12-13 16:03:24,058 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 613 transitions, 17994 flow [2022-12-13 16:03:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 221.875) internal successors, (1775), 8 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:03:24,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 16:03:24,058 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:03:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -707117102, now seen corresponding path program 5 times [2022-12-13 16:03:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:24,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690453866] [2022-12-13 16:03:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:24,194 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 16:03:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690453866] [2022-12-13 16:03:24,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690453866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:03:24,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:03:24,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:03:24,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874036245] [2022-12-13 16:03:24,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:03:24,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:03:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:03:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:03:24,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 457 [2022-12-13 16:03:24,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 613 transitions, 17994 flow. Second operand has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:24,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:03:24,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 457 [2022-12-13 16:03:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:04:12,656 INFO L130 PetriNetUnfolder]: 203857/311456 cut-off events. [2022-12-13 16:04:12,656 INFO L131 PetriNetUnfolder]: For 2205996/2206292 co-relation queries the response was YES. [2022-12-13 16:04:15,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940674 conditions, 311456 events. 203857/311456 cut-off events. For 2205996/2206292 co-relation queries the response was YES. Maximal size of possible extension queue 11113. Compared 2909372 event pairs, 104088 based on Foata normal form. 156/247872 useless extension candidates. Maximal degree in co-relation 940614. Up to 121810 conditions per place. [2022-12-13 16:04:17,036 INFO L137 encePairwiseOnDemand]: 442/457 looper letters, 421 selfloop transitions, 334 changer transitions 0/813 dead transitions. [2022-12-13 16:04:17,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 813 transitions, 20920 flow [2022-12-13 16:04:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:04:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:04:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2227 transitions. [2022-12-13 16:04:17,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5414539265742767 [2022-12-13 16:04:17,040 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2227 transitions. [2022-12-13 16:04:17,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2227 transitions. [2022-12-13 16:04:17,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:04:17,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2227 transitions. [2022-12-13 16:04:17,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.44444444444446) internal successors, (2227), 9 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:17,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:17,050 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:17,051 INFO L175 Difference]: Start difference. First operand has 246 places, 613 transitions, 17994 flow. Second operand 9 states and 2227 transitions. [2022-12-13 16:04:17,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 813 transitions, 20920 flow [2022-12-13 16:04:39,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 813 transitions, 20627 flow, removed 92 selfloop flow, removed 4 redundant places. [2022-12-13 16:04:39,878 INFO L231 Difference]: Finished difference. Result has 250 places, 633 transitions, 19607 flow [2022-12-13 16:04:39,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=17523, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19607, PETRI_PLACES=250, PETRI_TRANSITIONS=633} [2022-12-13 16:04:39,879 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 127 predicate places. [2022-12-13 16:04:39,880 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 633 transitions, 19607 flow [2022-12-13 16:04:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.28571428571428) internal successors, (1556), 7 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:39,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:04:39,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:04:39,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 16:04:39,880 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 16:04:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:04:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash -460392557, now seen corresponding path program 1 times [2022-12-13 16:04:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:04:39,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140981604] [2022-12-13 16:04:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:04:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:04:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:04:40,022 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 16:04:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:04:40,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140981604] [2022-12-13 16:04:40,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140981604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:04:40,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:04:40,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 16:04:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559676959] [2022-12-13 16:04:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:04:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:04:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:04:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:04:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:04:40,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 457 [2022-12-13 16:04:40,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 633 transitions, 19607 flow. Second operand has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:04:40,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:04:40,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 457 [2022-12-13 16:04:40,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:05:38,278 INFO L130 PetriNetUnfolder]: 231129/350106 cut-off events. [2022-12-13 16:05:38,278 INFO L131 PetriNetUnfolder]: For 2449917/2449945 co-relation queries the response was YES. [2022-12-13 16:05:41,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062536 conditions, 350106 events. 231129/350106 cut-off events. For 2449917/2449945 co-relation queries the response was YES. Maximal size of possible extension queue 12217. Compared 3271878 event pairs, 64918 based on Foata normal form. 188/286844 useless extension candidates. Maximal degree in co-relation 1062476. Up to 232348 conditions per place. [2022-12-13 16:05:43,290 INFO L137 encePairwiseOnDemand]: 440/457 looper letters, 488 selfloop transitions, 494 changer transitions 0/1014 dead transitions. [2022-12-13 16:05:43,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1014 transitions, 24195 flow [2022-12-13 16:05:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:05:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:05:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4742 transitions. [2022-12-13 16:05:43,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5188183807439825 [2022-12-13 16:05:43,296 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4742 transitions. [2022-12-13 16:05:43,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4742 transitions. [2022-12-13 16:05:43,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:05:43,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4742 transitions. [2022-12-13 16:05:43,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 237.1) internal successors, (4742), 20 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:43,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:43,307 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:05:43,308 INFO L175 Difference]: Start difference. First operand has 250 places, 633 transitions, 19607 flow. Second operand 20 states and 4742 transitions. [2022-12-13 16:05:43,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1014 transitions, 24195 flow