./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:16:30,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:16:30,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:16:30,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:16:30,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:16:30,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:16:30,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:16:30,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:16:30,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:16:30,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:16:30,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:16:30,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:16:30,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:16:30,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:16:30,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:16:30,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:16:30,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:16:30,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:16:30,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:16:30,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:16:30,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:16:30,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:16:30,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:16:30,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:16:30,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:16:30,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:16:30,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:16:30,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:16:30,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:16:30,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:16:30,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:16:30,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:16:30,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:16:30,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:16:30,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:16:30,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:16:30,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:16:30,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:16:30,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:16:30,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:16:30,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:16:30,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:16:30,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:16:30,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:16:30,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:16:30,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:16:30,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:16:30,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:16:30,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:16:30,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:16:30,962 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:16:30,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:16:30,963 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:16:30,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:16:30,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:16:30,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:16:30,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:16:30,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:16:30,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:16:30,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:16:30,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:16:30,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:16:30,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:16:30,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:16:30,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:16:30,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:16:30,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:30,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:16:30,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:16:30,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:16:30,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:16:30,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:16:30,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:16:30,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:16:30,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:16:30,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:16:30,969 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_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2022-11-25 17:16:31,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:16:31,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:16:31,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:16:31,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:16:31,298 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:16:31,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2022-11-25 17:16:34,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:16:34,510 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:16:34,511 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2022-11-25 17:16:34,518 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/data/710380a5f/210154d66b8f431bac842c37d20e0ee1/FLAG8e14b0121 [2022-11-25 17:16:34,533 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/data/710380a5f/210154d66b8f431bac842c37d20e0ee1 [2022-11-25 17:16:34,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:16:34,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:16:34,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:34,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:16:34,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:16:34,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ad66ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34, skipping insertion in model container [2022-11-25 17:16:34,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:16:34,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:16:34,722 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,725 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,726 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,727 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,735 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,738 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,740 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,748 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_f5ba9631-9243-44e0-ab10-fa466e69fe0a/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2022-11-25 17:16:34,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:34,769 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:16:34,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,792 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,792 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:16:34,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:16:34,801 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_f5ba9631-9243-44e0-ab10-fa466e69fe0a/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2022-11-25 17:16:34,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:34,815 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:16:34,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34 WrapperNode [2022-11-25 17:16:34,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:34,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:34,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:16:34,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:16:34,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,857 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2022-11-25 17:16:34,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:34,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:16:34,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:16:34,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:16:34,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:16:34,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:16:34,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:16:34,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:16:34,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (1/1) ... [2022-11-25 17:16:34,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:34,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:16:34,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:16:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:16:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:16:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:16:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:16:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:16:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:16:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:16:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:16:34,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:16:34,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:16:34,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:16:34,979 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:16:35,085 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:16:35,087 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:16:35,381 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:16:35,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:16:35,509 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:16:35,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:35 BoogieIcfgContainer [2022-11-25 17:16:35,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:16:35,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:16:35,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:16:35,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:16:35,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:16:34" (1/3) ... [2022-11-25 17:16:35,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be3eb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:35, skipping insertion in model container [2022-11-25 17:16:35,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:34" (2/3) ... [2022-11-25 17:16:35,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be3eb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:35, skipping insertion in model container [2022-11-25 17:16:35,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:35" (3/3) ... [2022-11-25 17:16:35,535 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2022-11-25 17:16:35,545 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:16:35,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:16:35,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:16:35,563 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:16:35,687 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:16:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2022-11-25 17:16:35,856 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2022-11-25 17:16:35,857 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:16:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-11-25 17:16:35,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2022-11-25 17:16:35,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2022-11-25 17:16:35,879 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:16:35,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 95 transitions, 208 flow [2022-11-25 17:16:35,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 95 transitions, 208 flow [2022-11-25 17:16:35,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 208 flow [2022-11-25 17:16:35,944 INFO L130 PetriNetUnfolder]: 7/95 cut-off events. [2022-11-25 17:16:35,944 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:16:35,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 7/95 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-11-25 17:16:35,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 1250 [2022-11-25 17:16:40,316 INFO L134 LiptonReduction]: Checked pairs total: 1799 [2022-11-25 17:16:40,317 INFO L136 LiptonReduction]: Total number of compositions: 84 [2022-11-25 17:16:40,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:16:40,355 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@118f7557, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:16:40,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:16:40,381 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2022-11-25 17:16:40,383 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:16:40,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:40,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:40,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1930239031, now seen corresponding path program 1 times [2022-11-25 17:16:40,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:40,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440621980] [2022-11-25 17:16:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:40,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:41,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440621980] [2022-11-25 17:16:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440621980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:41,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:41,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628007927] [2022-11-25 17:16:41,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:16:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:16:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:16:41,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 193 [2022-11-25 17:16:41,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:41,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 193 [2022-11-25 17:16:41,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:41,664 INFO L130 PetriNetUnfolder]: 348/572 cut-off events. [2022-11-25 17:16:41,664 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-25 17:16:41,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 572 events. 348/572 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2289 event pairs, 49 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 925. Up to 297 conditions per place. [2022-11-25 17:16:41,680 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2022-11-25 17:16:41,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2022-11-25 17:16:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:16:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:16:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2022-11-25 17:16:41,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5062916358253146 [2022-11-25 17:16:41,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2022-11-25 17:16:41,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2022-11-25 17:16:41,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:41,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2022-11-25 17:16:41,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,729 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,731 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 684 transitions. [2022-11-25 17:16:41,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2022-11-25 17:16:41,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:16:41,742 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2022-11-25 17:16:41,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2022-11-25 17:16:41,748 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 17:16:41,748 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2022-11-25 17:16:41,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:41,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:41,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:16:41,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1879440243, now seen corresponding path program 2 times [2022-11-25 17:16:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077595119] [2022-11-25 17:16:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:41,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077595119] [2022-11-25 17:16:41,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077595119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:41,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529802371] [2022-11-25 17:16:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:41,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:41,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 193 [2022-11-25 17:16:41,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:41,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 193 [2022-11-25 17:16:41,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:42,121 INFO L130 PetriNetUnfolder]: 251/422 cut-off events. [2022-11-25 17:16:42,121 INFO L131 PetriNetUnfolder]: For 628/644 co-relation queries the response was YES. [2022-11-25 17:16:42,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 422 events. 251/422 cut-off events. For 628/644 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1538 event pairs, 23 based on Foata normal form. 24/432 useless extension candidates. Maximal degree in co-relation 841. Up to 244 conditions per place. [2022-11-25 17:16:42,125 INFO L137 encePairwiseOnDemand]: 189/193 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2022-11-25 17:16:42,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2022-11-25 17:16:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:16:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2022-11-25 17:16:42,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5064766839378239 [2022-11-25 17:16:42,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2022-11-25 17:16:42,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2022-11-25 17:16:42,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:42,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2022-11-25 17:16:42,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,131 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 391 transitions. [2022-11-25 17:16:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2022-11-25 17:16:42,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 17:16:42,135 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2022-11-25 17:16:42,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-11-25 17:16:42,136 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 17:16:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2022-11-25 17:16:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:42,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:42,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:16:42,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:42,138 INFO L85 PathProgramCache]: Analyzing trace with hash 741506167, now seen corresponding path program 3 times [2022-11-25 17:16:42,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:42,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396380293] [2022-11-25 17:16:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:42,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396380293] [2022-11-25 17:16:42,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396380293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:42,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:42,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:42,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862380690] [2022-11-25 17:16:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:42,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:16:42,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:16:42,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:16:42,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 193 [2022-11-25 17:16:42,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:42,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 193 [2022-11-25 17:16:42,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:42,487 INFO L130 PetriNetUnfolder]: 162/285 cut-off events. [2022-11-25 17:16:42,487 INFO L131 PetriNetUnfolder]: For 448/464 co-relation queries the response was YES. [2022-11-25 17:16:42,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 285 events. 162/285 cut-off events. For 448/464 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 966 event pairs, 17 based on Foata normal form. 52/335 useless extension candidates. Maximal degree in co-relation 870. Up to 117 conditions per place. [2022-11-25 17:16:42,490 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 33 selfloop transitions, 7 changer transitions 6/49 dead transitions. [2022-11-25 17:16:42,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 318 flow [2022-11-25 17:16:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:16:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:16:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-11-25 17:16:42,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49533678756476685 [2022-11-25 17:16:42,493 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-11-25 17:16:42,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-11-25 17:16:42,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:42,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-11-25 17:16:42,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,502 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 5 states and 478 transitions. [2022-11-25 17:16:42,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 318 flow [2022-11-25 17:16:42,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:16:42,507 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 160 flow [2022-11-25 17:16:42,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-11-25 17:16:42,508 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2022-11-25 17:16:42,509 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 160 flow [2022-11-25 17:16:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:42,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:42,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:42,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:16:42,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 248511963, now seen corresponding path program 1 times [2022-11-25 17:16:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722750181] [2022-11-25 17:16:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722750181] [2022-11-25 17:16:42,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722750181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949060647] [2022-11-25 17:16:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:42,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:42,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:16:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:16:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:43,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949060647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:43,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:43,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-25 17:16:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691067448] [2022-11-25 17:16:43,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:16:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:16:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:16:43,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 193 [2022-11-25 17:16:43,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:43,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:43,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 193 [2022-11-25 17:16:43,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:43,466 INFO L130 PetriNetUnfolder]: 203/324 cut-off events. [2022-11-25 17:16:43,467 INFO L131 PetriNetUnfolder]: For 1336/1376 co-relation queries the response was YES. [2022-11-25 17:16:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 324 events. 203/324 cut-off events. For 1336/1376 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1039 event pairs, 5 based on Foata normal form. 40/349 useless extension candidates. Maximal degree in co-relation 872. Up to 155 conditions per place. [2022-11-25 17:16:43,470 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 38 selfloop transitions, 7 changer transitions 3/52 dead transitions. [2022-11-25 17:16:43,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 396 flow [2022-11-25 17:16:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:16:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:16:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 570 transitions. [2022-11-25 17:16:43,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49222797927461137 [2022-11-25 17:16:43,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 570 transitions. [2022-11-25 17:16:43,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 570 transitions. [2022-11-25 17:16:43,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:43,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 570 transitions. [2022-11-25 17:16:43,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:43,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:43,479 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:43,479 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 160 flow. Second operand 6 states and 570 transitions. [2022-11-25 17:16:43,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 396 flow [2022-11-25 17:16:43,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 388 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:16:43,483 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 184 flow [2022-11-25 17:16:43,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2022-11-25 17:16:43,484 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2022-11-25 17:16:43,485 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 184 flow [2022-11-25 17:16:43,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:43,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:43,486 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:43,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:16:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:43,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1364090267, now seen corresponding path program 2 times [2022-11-25 17:16:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476413196] [2022-11-25 17:16:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:44,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:44,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476413196] [2022-11-25 17:16:44,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476413196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:44,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:44,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:16:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651924639] [2022-11-25 17:16:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:44,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:16:44,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:16:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:16:44,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 193 [2022-11-25 17:16:44,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:44,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 193 [2022-11-25 17:16:44,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:44,421 INFO L130 PetriNetUnfolder]: 217/407 cut-off events. [2022-11-25 17:16:44,421 INFO L131 PetriNetUnfolder]: For 1542/1570 co-relation queries the response was YES. [2022-11-25 17:16:44,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 407 events. 217/407 cut-off events. For 1542/1570 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1656 event pairs, 11 based on Foata normal form. 44/448 useless extension candidates. Maximal degree in co-relation 1478. Up to 199 conditions per place. [2022-11-25 17:16:44,426 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 36 selfloop transitions, 5 changer transitions 30/75 dead transitions. [2022-11-25 17:16:44,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 580 flow [2022-11-25 17:16:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:16:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:16:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 755 transitions. [2022-11-25 17:16:44,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4889896373056995 [2022-11-25 17:16:44,431 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 755 transitions. [2022-11-25 17:16:44,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 755 transitions. [2022-11-25 17:16:44,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:44,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 755 transitions. [2022-11-25 17:16:44,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,440 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,440 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 184 flow. Second operand 8 states and 755 transitions. [2022-11-25 17:16:44,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 580 flow [2022-11-25 17:16:44,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 552 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 17:16:44,447 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 227 flow [2022-11-25 17:16:44,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2022-11-25 17:16:44,450 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-11-25 17:16:44,450 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 227 flow [2022-11-25 17:16:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:44,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:16:44,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 364683930, now seen corresponding path program 1 times [2022-11-25 17:16:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:44,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895663449] [2022-11-25 17:16:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:44,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895663449] [2022-11-25 17:16:44,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895663449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:44,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:44,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:16:44,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608209117] [2022-11-25 17:16:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:44,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:16:44,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:16:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:16:44,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 193 [2022-11-25 17:16:44,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:44,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:44,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 193 [2022-11-25 17:16:44,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:45,086 INFO L130 PetriNetUnfolder]: 220/401 cut-off events. [2022-11-25 17:16:45,087 INFO L131 PetriNetUnfolder]: For 3217/3265 co-relation queries the response was YES. [2022-11-25 17:16:45,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 401 events. 220/401 cut-off events. For 3217/3265 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1559 event pairs, 19 based on Foata normal form. 49/442 useless extension candidates. Maximal degree in co-relation 1717. Up to 231 conditions per place. [2022-11-25 17:16:45,091 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 36 selfloop transitions, 5 changer transitions 23/68 dead transitions. [2022-11-25 17:16:45,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 652 flow [2022-11-25 17:16:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:16:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:16:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 742 transitions. [2022-11-25 17:16:45,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4805699481865285 [2022-11-25 17:16:45,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 742 transitions. [2022-11-25 17:16:45,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 742 transitions. [2022-11-25 17:16:45,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:45,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 742 transitions. [2022-11-25 17:16:45,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.75) internal successors, (742), 8 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:45,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:45,101 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:45,101 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 227 flow. Second operand 8 states and 742 transitions. [2022-11-25 17:16:45,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 652 flow [2022-11-25 17:16:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 569 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-11-25 17:16:45,111 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 255 flow [2022-11-25 17:16:45,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=255, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2022-11-25 17:16:45,114 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2022-11-25 17:16:45,114 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 255 flow [2022-11-25 17:16:45,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:45,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:45,115 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:45,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:16:45,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1646178408, now seen corresponding path program 1 times [2022-11-25 17:16:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794697479] [2022-11-25 17:16:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:45,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794697479] [2022-11-25 17:16:45,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794697479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081041531] [2022-11-25 17:16:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:45,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:45,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:45,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:16:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:16:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:45,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081041531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:46,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:46,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-25 17:16:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443516581] [2022-11-25 17:16:46,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:16:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:16:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:16:46,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:16:46,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 255 flow. Second operand has 15 states, 15 states have (on average 85.06666666666666) internal successors, (1276), 15 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:46,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:46,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:16:46,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:47,997 INFO L130 PetriNetUnfolder]: 600/1116 cut-off events. [2022-11-25 17:16:47,997 INFO L131 PetriNetUnfolder]: For 9522/9586 co-relation queries the response was YES. [2022-11-25 17:16:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 1116 events. 600/1116 cut-off events. For 9522/9586 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5905 event pairs, 10 based on Foata normal form. 122/1225 useless extension candidates. Maximal degree in co-relation 4480. Up to 445 conditions per place. [2022-11-25 17:16:48,008 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 109 selfloop transitions, 43 changer transitions 108/264 dead transitions. [2022-11-25 17:16:48,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 264 transitions, 2413 flow [2022-11-25 17:16:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:16:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 17:16:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3381 transitions. [2022-11-25 17:16:48,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4610035451322607 [2022-11-25 17:16:48,017 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3381 transitions. [2022-11-25 17:16:48,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3381 transitions. [2022-11-25 17:16:48,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:48,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3381 transitions. [2022-11-25 17:16:48,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.97368421052632) internal successors, (3381), 38 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:48,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:48,041 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:48,041 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 255 flow. Second operand 38 states and 3381 transitions. [2022-11-25 17:16:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 264 transitions, 2413 flow [2022-11-25 17:16:48,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 264 transitions, 2336 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-11-25 17:16:48,061 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 832 flow [2022-11-25 17:16:48,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=832, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2022-11-25 17:16:48,062 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2022-11-25 17:16:48,063 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 832 flow [2022-11-25 17:16:48,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.06666666666666) internal successors, (1276), 15 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:48,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:48,064 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:48,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:48,270 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 865050665, now seen corresponding path program 3 times [2022-11-25 17:16:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:48,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216009215] [2022-11-25 17:16:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216009215] [2022-11-25 17:16:48,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216009215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823965907] [2022-11-25 17:16:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:48,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:16:49,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:16:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:49,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:16:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:49,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:49,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823965907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:49,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:49,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 17:16:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380577269] [2022-11-25 17:16:49,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:16:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:16:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:16:49,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 193 [2022-11-25 17:16:49,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 832 flow. Second operand has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:49,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:49,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 193 [2022-11-25 17:16:49,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:51,567 INFO L130 PetriNetUnfolder]: 742/1342 cut-off events. [2022-11-25 17:16:51,567 INFO L131 PetriNetUnfolder]: For 19940/20035 co-relation queries the response was YES. [2022-11-25 17:16:51,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8757 conditions, 1342 events. 742/1342 cut-off events. For 19940/20035 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6853 event pairs, 0 based on Foata normal form. 92/1399 useless extension candidates. Maximal degree in co-relation 8062. Up to 569 conditions per place. [2022-11-25 17:16:51,583 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 120 selfloop transitions, 62 changer transitions 91/281 dead transitions. [2022-11-25 17:16:51,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 281 transitions, 3643 flow [2022-11-25 17:16:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:16:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 17:16:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3156 transitions. [2022-11-25 17:16:51,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4672094744633605 [2022-11-25 17:16:51,594 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3156 transitions. [2022-11-25 17:16:51,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3156 transitions. [2022-11-25 17:16:51,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:51,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3156 transitions. [2022-11-25 17:16:51,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.17142857142858) internal successors, (3156), 35 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 193.0) internal successors, (6948), 36 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,620 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 193.0) internal successors, (6948), 36 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,620 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 832 flow. Second operand 35 states and 3156 transitions. [2022-11-25 17:16:51,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 281 transitions, 3643 flow [2022-11-25 17:16:51,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 281 transitions, 2053 flow, removed 722 selfloop flow, removed 20 redundant places. [2022-11-25 17:16:51,689 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 744 flow [2022-11-25 17:16:51,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=744, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-11-25 17:16:51,692 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2022-11-25 17:16:51,692 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 744 flow [2022-11-25 17:16:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:51,693 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:51,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:16:51,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:51,899 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1495252049, now seen corresponding path program 2 times [2022-11-25 17:16:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952586848] [2022-11-25 17:16:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952586848] [2022-11-25 17:16:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952586848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582506507] [2022-11-25 17:16:52,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:52,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:52,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:52,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:52,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:16:52,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:52,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:52,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:16:52,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:52,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:53,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582506507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:53,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:53,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-25 17:16:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366258856] [2022-11-25 17:16:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:16:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:16:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:16:53,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:16:53,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 744 flow. Second operand has 19 states, 19 states have (on average 84.73684210526316) internal successors, (1610), 19 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:53,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:53,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:16:53,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:55,781 INFO L130 PetriNetUnfolder]: 1140/2092 cut-off events. [2022-11-25 17:16:55,781 INFO L131 PetriNetUnfolder]: For 13474/13545 co-relation queries the response was YES. [2022-11-25 17:16:55,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 2092 events. 1140/2092 cut-off events. For 13474/13545 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11876 event pairs, 0 based on Foata normal form. 123/2197 useless extension candidates. Maximal degree in co-relation 8265. Up to 418 conditions per place. [2022-11-25 17:16:55,802 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 171 selfloop transitions, 98 changer transitions 94/371 dead transitions. [2022-11-25 17:16:55,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 371 transitions, 3539 flow [2022-11-25 17:16:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:16:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 17:16:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3392 transitions. [2022-11-25 17:16:55,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4625034087810199 [2022-11-25 17:16:55,810 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3392 transitions. [2022-11-25 17:16:55,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3392 transitions. [2022-11-25 17:16:55,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:55,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3392 transitions. [2022-11-25 17:16:55,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 89.26315789473684) internal successors, (3392), 38 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,833 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,833 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 744 flow. Second operand 38 states and 3392 transitions. [2022-11-25 17:16:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 371 transitions, 3539 flow [2022-11-25 17:16:55,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 371 transitions, 2878 flow, removed 306 selfloop flow, removed 18 redundant places. [2022-11-25 17:16:55,932 INFO L231 Difference]: Finished difference. Result has 115 places, 156 transitions, 1354 flow [2022-11-25 17:16:55,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1354, PETRI_PLACES=115, PETRI_TRANSITIONS=156} [2022-11-25 17:16:55,933 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2022-11-25 17:16:55,933 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 156 transitions, 1354 flow [2022-11-25 17:16:55,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.73684210526316) internal successors, (1610), 19 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:55,935 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:55,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:56,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:56,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:16:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1268640920, now seen corresponding path program 2 times [2022-11-25 17:16:56,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991997707] [2022-11-25 17:16:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991997707] [2022-11-25 17:16:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991997707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163583256] [2022-11-25 17:16:56,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:56,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:56,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:56,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:16:56,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:16:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:56,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:57,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163583256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:57,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:57,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 17:16:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355519796] [2022-11-25 17:16:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:16:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:16:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:16:57,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 193 [2022-11-25 17:16:57,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 156 transitions, 1354 flow. Second operand has 18 states, 18 states have (on average 84.11111111111111) internal successors, (1514), 18 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:57,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:57,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 193 [2022-11-25 17:16:57,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:00,219 INFO L130 PetriNetUnfolder]: 1773/2942 cut-off events. [2022-11-25 17:17:00,219 INFO L131 PetriNetUnfolder]: For 9449/9449 co-relation queries the response was YES. [2022-11-25 17:17:00,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12547 conditions, 2942 events. 1773/2942 cut-off events. For 9449/9449 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14953 event pairs, 37 based on Foata normal form. 138/3080 useless extension candidates. Maximal degree in co-relation 12098. Up to 838 conditions per place. [2022-11-25 17:17:00,243 INFO L137 encePairwiseOnDemand]: 183/193 looper letters, 178 selfloop transitions, 92 changer transitions 158/428 dead transitions. [2022-11-25 17:17:00,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 428 transitions, 4120 flow [2022-11-25 17:17:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:17:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-25 17:17:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4278 transitions. [2022-11-25 17:17:00,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523633287511896 [2022-11-25 17:17:00,253 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4278 transitions. [2022-11-25 17:17:00,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4278 transitions. [2022-11-25 17:17:00,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:00,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4278 transitions. [2022-11-25 17:17:00,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.3061224489796) internal successors, (4278), 49 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 193.0) internal successors, (9650), 50 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,280 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 193.0) internal successors, (9650), 50 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,280 INFO L175 Difference]: Start difference. First operand has 115 places, 156 transitions, 1354 flow. Second operand 49 states and 4278 transitions. [2022-11-25 17:17:00,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 428 transitions, 4120 flow [2022-11-25 17:17:00,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 428 transitions, 3795 flow, removed 142 selfloop flow, removed 15 redundant places. [2022-11-25 17:17:00,381 INFO L231 Difference]: Finished difference. Result has 168 places, 167 transitions, 1661 flow [2022-11-25 17:17:00,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1661, PETRI_PLACES=168, PETRI_TRANSITIONS=167} [2022-11-25 17:17:00,382 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2022-11-25 17:17:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 167 transitions, 1661 flow [2022-11-25 17:17:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 84.11111111111111) internal successors, (1514), 18 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:00,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:00,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:00,590 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:00,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1609004777, now seen corresponding path program 3 times [2022-11-25 17:17:00,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:00,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808570551] [2022-11-25 17:17:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808570551] [2022-11-25 17:17:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808570551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346553187] [2022-11-25 17:17:01,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:01,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:01,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:01,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:17:01,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:17:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:17:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:01,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:02,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346553187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:02,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:02,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-25 17:17:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082275428] [2022-11-25 17:17:02,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:02,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:17:02,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:02,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:17:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:17:02,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:17:02,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 167 transitions, 1661 flow. Second operand has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:02,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:02,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:17:02,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:06,601 INFO L130 PetriNetUnfolder]: 1535/2871 cut-off events. [2022-11-25 17:17:06,602 INFO L131 PetriNetUnfolder]: For 55466/55669 co-relation queries the response was YES. [2022-11-25 17:17:06,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17837 conditions, 2871 events. 1535/2871 cut-off events. For 55466/55669 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17910 event pairs, 2 based on Foata normal form. 187/3024 useless extension candidates. Maximal degree in co-relation 17704. Up to 734 conditions per place. [2022-11-25 17:17:06,635 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 249 selfloop transitions, 153 changer transitions 119/533 dead transitions. [2022-11-25 17:17:06,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 533 transitions, 6585 flow [2022-11-25 17:17:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 17:17:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-25 17:17:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5723 transitions. [2022-11-25 17:17:06,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45619768832204066 [2022-11-25 17:17:06,646 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5723 transitions. [2022-11-25 17:17:06,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5723 transitions. [2022-11-25 17:17:06,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:06,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5723 transitions. [2022-11-25 17:17:06,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 88.04615384615384) internal successors, (5723), 65 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:06,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 193.0) internal successors, (12738), 66 states have internal predecessors, (12738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:06,675 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 193.0) internal successors, (12738), 66 states have internal predecessors, (12738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:06,675 INFO L175 Difference]: Start difference. First operand has 168 places, 167 transitions, 1661 flow. Second operand 65 states and 5723 transitions. [2022-11-25 17:17:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 533 transitions, 6585 flow [2022-11-25 17:17:06,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 533 transitions, 5157 flow, removed 693 selfloop flow, removed 34 redundant places. [2022-11-25 17:17:06,868 INFO L231 Difference]: Finished difference. Result has 178 places, 230 transitions, 2551 flow [2022-11-25 17:17:06,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=2551, PETRI_PLACES=178, PETRI_TRANSITIONS=230} [2022-11-25 17:17:06,869 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2022-11-25 17:17:06,869 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 230 transitions, 2551 flow [2022-11-25 17:17:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:06,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:06,870 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:06,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:07,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:17:07,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1771726549, now seen corresponding path program 4 times [2022-11-25 17:17:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:07,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681085875] [2022-11-25 17:17:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:07,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681085875] [2022-11-25 17:17:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681085875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497317175] [2022-11-25 17:17:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:07,707 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:07,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:17:07,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:08,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:09,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497317175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:09,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:09,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:17:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769900025] [2022-11-25 17:17:09,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:17:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:17:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:17:10,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:17:10,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 230 transitions, 2551 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:10,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:10,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:17:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:16,646 INFO L130 PetriNetUnfolder]: 2269/4195 cut-off events. [2022-11-25 17:17:16,646 INFO L131 PetriNetUnfolder]: For 48533/48613 co-relation queries the response was YES. [2022-11-25 17:17:16,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24901 conditions, 4195 events. 2269/4195 cut-off events. For 48533/48613 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27233 event pairs, 56 based on Foata normal form. 240/4382 useless extension candidates. Maximal degree in co-relation 22926. Up to 818 conditions per place. [2022-11-25 17:17:16,693 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 257 selfloop transitions, 207 changer transitions 231/706 dead transitions. [2022-11-25 17:17:16,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 706 transitions, 8494 flow [2022-11-25 17:17:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 17:17:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-25 17:17:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6406 transitions. [2022-11-25 17:17:16,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4609959700633276 [2022-11-25 17:17:16,703 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6406 transitions. [2022-11-25 17:17:16,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6406 transitions. [2022-11-25 17:17:16,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:16,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6406 transitions. [2022-11-25 17:17:16,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 88.97222222222223) internal successors, (6406), 72 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:16,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 193.0) internal successors, (14089), 73 states have internal predecessors, (14089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:16,733 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 193.0) internal successors, (14089), 73 states have internal predecessors, (14089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:16,733 INFO L175 Difference]: Start difference. First operand has 178 places, 230 transitions, 2551 flow. Second operand 72 states and 6406 transitions. [2022-11-25 17:17:16,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 706 transitions, 8494 flow [2022-11-25 17:17:17,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 706 transitions, 6743 flow, removed 834 selfloop flow, removed 26 redundant places. [2022-11-25 17:17:17,047 INFO L231 Difference]: Finished difference. Result has 218 places, 276 transitions, 3294 flow [2022-11-25 17:17:17,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=3294, PETRI_PLACES=218, PETRI_TRANSITIONS=276} [2022-11-25 17:17:17,048 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2022-11-25 17:17:17,048 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 276 transitions, 3294 flow [2022-11-25 17:17:17,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:17,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:17,049 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:17,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:17:17,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 439234540, now seen corresponding path program 5 times [2022-11-25 17:17:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:17,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037223481] [2022-11-25 17:17:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:17,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:17,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:17,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037223481] [2022-11-25 17:17:17,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037223481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:17,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993767977] [2022-11-25 17:17:17,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:17,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:17,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:17,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:17,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:17:17,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:17:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:18,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:19,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993767977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:19,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:19,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:17:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268592368] [2022-11-25 17:17:19,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:19,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:17:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:17:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:17:19,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:17:19,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 276 transitions, 3294 flow. Second operand has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:19,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:19,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:17:19,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:24,772 INFO L130 PetriNetUnfolder]: 2790/5156 cut-off events. [2022-11-25 17:17:24,772 INFO L131 PetriNetUnfolder]: For 74158/74230 co-relation queries the response was YES. [2022-11-25 17:17:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30915 conditions, 5156 events. 2790/5156 cut-off events. For 74158/74230 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 34939 event pairs, 78 based on Foata normal form. 206/5281 useless extension candidates. Maximal degree in co-relation 30851. Up to 1031 conditions per place. [2022-11-25 17:17:24,821 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 305 selfloop transitions, 202 changer transitions 240/758 dead transitions. [2022-11-25 17:17:24,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 758 transitions, 9042 flow [2022-11-25 17:17:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-25 17:17:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-25 17:17:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5971 transitions. [2022-11-25 17:17:24,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4617585646895058 [2022-11-25 17:17:24,831 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5971 transitions. [2022-11-25 17:17:24,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5971 transitions. [2022-11-25 17:17:24,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:24,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5971 transitions. [2022-11-25 17:17:24,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 89.11940298507463) internal successors, (5971), 67 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:24,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 193.0) internal successors, (13124), 68 states have internal predecessors, (13124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:24,858 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 193.0) internal successors, (13124), 68 states have internal predecessors, (13124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:24,858 INFO L175 Difference]: Start difference. First operand has 218 places, 276 transitions, 3294 flow. Second operand 67 states and 5971 transitions. [2022-11-25 17:17:24,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 758 transitions, 9042 flow [2022-11-25 17:17:25,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 758 transitions, 8116 flow, removed 319 selfloop flow, removed 27 redundant places. [2022-11-25 17:17:25,421 INFO L231 Difference]: Finished difference. Result has 242 places, 351 transitions, 4378 flow [2022-11-25 17:17:25,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=4378, PETRI_PLACES=242, PETRI_TRANSITIONS=351} [2022-11-25 17:17:25,422 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2022-11-25 17:17:25,422 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 351 transitions, 4378 flow [2022-11-25 17:17:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:25,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:25,423 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:25,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:17:25,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:25,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash -9890982, now seen corresponding path program 6 times [2022-11-25 17:17:25,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212023894] [2022-11-25 17:17:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:26,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212023894] [2022-11-25 17:17:26,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212023894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:26,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750817926] [2022-11-25 17:17:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:17:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:26,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:26,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:17:26,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 17:17:26,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:26,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:28,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750817926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:28,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:28,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-25 17:17:28,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581907824] [2022-11-25 17:17:28,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:28,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:17:28,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:17:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:28,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:17:28,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 351 transitions, 4378 flow. Second operand has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:28,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:17:28,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:35,197 INFO L130 PetriNetUnfolder]: 2877/5373 cut-off events. [2022-11-25 17:17:35,197 INFO L131 PetriNetUnfolder]: For 95611/95849 co-relation queries the response was YES. [2022-11-25 17:17:35,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34387 conditions, 5373 events. 2877/5373 cut-off events. For 95611/95849 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 37245 event pairs, 60 based on Foata normal form. 266/5588 useless extension candidates. Maximal degree in co-relation 34320. Up to 1418 conditions per place. [2022-11-25 17:17:35,256 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 365 selfloop transitions, 195 changer transitions 164/746 dead transitions. [2022-11-25 17:17:35,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 746 transitions, 10685 flow [2022-11-25 17:17:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 17:17:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-25 17:17:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6058 transitions. [2022-11-25 17:17:35,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45490726139520915 [2022-11-25 17:17:35,269 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6058 transitions. [2022-11-25 17:17:35,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6058 transitions. [2022-11-25 17:17:35,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:35,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6058 transitions. [2022-11-25 17:17:35,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 87.79710144927536) internal successors, (6058), 69 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 193.0) internal successors, (13510), 70 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,304 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 193.0) internal successors, (13510), 70 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,304 INFO L175 Difference]: Start difference. First operand has 242 places, 351 transitions, 4378 flow. Second operand 69 states and 6058 transitions. [2022-11-25 17:17:35,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 746 transitions, 10685 flow [2022-11-25 17:17:35,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 746 transitions, 9262 flow, removed 689 selfloop flow, removed 29 redundant places. [2022-11-25 17:17:35,629 INFO L231 Difference]: Finished difference. Result has 277 places, 416 transitions, 5765 flow [2022-11-25 17:17:35,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=5765, PETRI_PLACES=277, PETRI_TRANSITIONS=416} [2022-11-25 17:17:35,631 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2022-11-25 17:17:35,631 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 416 transitions, 5765 flow [2022-11-25 17:17:35,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:35,631 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:35,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:35,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:17:35,832 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2026538733, now seen corresponding path program 7 times [2022-11-25 17:17:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652081132] [2022-11-25 17:17:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652081132] [2022-11-25 17:17:36,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652081132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458637579] [2022-11-25 17:17:36,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:17:36,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:36,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:36,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:17:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:36,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458637579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:38,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:38,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:17:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680427783] [2022-11-25 17:17:38,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:17:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:17:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:17:38,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:17:38,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 416 transitions, 5765 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:38,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:38,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:17:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:43,694 INFO L130 PetriNetUnfolder]: 3854/7042 cut-off events. [2022-11-25 17:17:43,695 INFO L131 PetriNetUnfolder]: For 110618/110734 co-relation queries the response was YES. [2022-11-25 17:17:43,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47154 conditions, 7042 events. 3854/7042 cut-off events. For 110618/110734 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 50055 event pairs, 120 based on Foata normal form. 294/7225 useless extension candidates. Maximal degree in co-relation 47064. Up to 1925 conditions per place. [2022-11-25 17:17:43,765 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 391 selfloop transitions, 238 changer transitions 247/891 dead transitions. [2022-11-25 17:17:43,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 891 transitions, 13185 flow [2022-11-25 17:17:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:17:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-25 17:17:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5440 transitions. [2022-11-25 17:17:43,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.462074237662448 [2022-11-25 17:17:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5440 transitions. [2022-11-25 17:17:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5440 transitions. [2022-11-25 17:17:43,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:43,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5440 transitions. [2022-11-25 17:17:43,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 89.18032786885246) internal successors, (5440), 61 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:43,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 193.0) internal successors, (11966), 62 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:43,797 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 193.0) internal successors, (11966), 62 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:43,797 INFO L175 Difference]: Start difference. First operand has 277 places, 416 transitions, 5765 flow. Second operand 61 states and 5440 transitions. [2022-11-25 17:17:43,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 891 transitions, 13185 flow [2022-11-25 17:17:44,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 891 transitions, 11531 flow, removed 794 selfloop flow, removed 34 redundant places. [2022-11-25 17:17:44,546 INFO L231 Difference]: Finished difference. Result has 300 places, 485 transitions, 7169 flow [2022-11-25 17:17:44,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=7169, PETRI_PLACES=300, PETRI_TRANSITIONS=485} [2022-11-25 17:17:44,547 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2022-11-25 17:17:44,547 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 485 transitions, 7169 flow [2022-11-25 17:17:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:44,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:44,548 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:44,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:44,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:44,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash 27400414, now seen corresponding path program 8 times [2022-11-25 17:17:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035314760] [2022-11-25 17:17:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035314760] [2022-11-25 17:17:45,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035314760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915271712] [2022-11-25 17:17:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:45,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:45,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:17:45,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:45,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:46,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:47,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915271712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:47,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-25 17:17:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065738148] [2022-11-25 17:17:47,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:17:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:17:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:47,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 193 [2022-11-25 17:17:47,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 485 transitions, 7169 flow. Second operand has 24 states, 24 states have (on average 81.79166666666667) internal successors, (1963), 24 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:47,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:47,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 193 [2022-11-25 17:17:47,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:56,315 INFO L130 PetriNetUnfolder]: 6087/10000 cut-off events. [2022-11-25 17:17:56,315 INFO L131 PetriNetUnfolder]: For 120015/120015 co-relation queries the response was YES. [2022-11-25 17:17:56,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60148 conditions, 10000 events. 6087/10000 cut-off events. For 120015/120015 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 63587 event pairs, 639 based on Foata normal form. 266/10266 useless extension candidates. Maximal degree in co-relation 60066. Up to 4846 conditions per place. [2022-11-25 17:17:56,456 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 535 selfloop transitions, 210 changer transitions 294/1039 dead transitions. [2022-11-25 17:17:56,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1039 transitions, 15293 flow [2022-11-25 17:17:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-25 17:17:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-11-25 17:17:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 8841 transitions. [2022-11-25 17:17:56,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4404643284176963 [2022-11-25 17:17:56,469 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 8841 transitions. [2022-11-25 17:17:56,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 8841 transitions. [2022-11-25 17:17:56,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:56,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 8841 transitions. [2022-11-25 17:17:56,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 85.00961538461539) internal successors, (8841), 104 states have internal predecessors, (8841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:56,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 193.0) internal successors, (20265), 105 states have internal predecessors, (20265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:56,504 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 193.0) internal successors, (20265), 105 states have internal predecessors, (20265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:56,504 INFO L175 Difference]: Start difference. First operand has 300 places, 485 transitions, 7169 flow. Second operand 104 states and 8841 transitions. [2022-11-25 17:17:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1039 transitions, 15293 flow [2022-11-25 17:17:57,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1039 transitions, 13625 flow, removed 518 selfloop flow, removed 30 redundant places. [2022-11-25 17:17:57,734 INFO L231 Difference]: Finished difference. Result has 410 places, 529 transitions, 8013 flow [2022-11-25 17:17:57,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=8013, PETRI_PLACES=410, PETRI_TRANSITIONS=529} [2022-11-25 17:17:57,735 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2022-11-25 17:17:57,735 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 529 transitions, 8013 flow [2022-11-25 17:17:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.79166666666667) internal successors, (1963), 24 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:57,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:57,736 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:57,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 17:17:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:57,936 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:17:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1314017328, now seen corresponding path program 9 times [2022-11-25 17:17:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:57,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771826267] [2022-11-25 17:17:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771826267] [2022-11-25 17:17:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771826267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537137896] [2022-11-25 17:17:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:58,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:58,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:17:58,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:17:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:17:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:58,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:00,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537137896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:00,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:00,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:18:00,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162333094] [2022-11-25 17:18:00,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:00,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:18:00,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:18:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:18:00,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 193 [2022-11-25 17:18:00,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 529 transitions, 8013 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:00,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 193 [2022-11-25 17:18:00,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:09,651 INFO L130 PetriNetUnfolder]: 6465/10660 cut-off events. [2022-11-25 17:18:09,652 INFO L131 PetriNetUnfolder]: For 612232/612232 co-relation queries the response was YES. [2022-11-25 17:18:09,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85485 conditions, 10660 events. 6465/10660 cut-off events. For 612232/612232 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68763 event pairs, 469 based on Foata normal form. 136/10796 useless extension candidates. Maximal degree in co-relation 85208. Up to 4630 conditions per place. [2022-11-25 17:18:09,784 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 579 selfloop transitions, 280 changer transitions 144/1003 dead transitions. [2022-11-25 17:18:09,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1003 transitions, 17146 flow [2022-11-25 17:18:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-25 17:18:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-25 17:18:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6443 transitions. [2022-11-25 17:18:09,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451122625215889 [2022-11-25 17:18:09,794 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6443 transitions. [2022-11-25 17:18:09,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6443 transitions. [2022-11-25 17:18:09,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:09,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6443 transitions. [2022-11-25 17:18:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 85.90666666666667) internal successors, (6443), 75 states have internal predecessors, (6443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:09,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 193.0) internal successors, (14668), 76 states have internal predecessors, (14668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:09,819 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 193.0) internal successors, (14668), 76 states have internal predecessors, (14668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:09,820 INFO L175 Difference]: Start difference. First operand has 410 places, 529 transitions, 8013 flow. Second operand 75 states and 6443 transitions. [2022-11-25 17:18:09,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1003 transitions, 17146 flow [2022-11-25 17:18:11,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1003 transitions, 13508 flow, removed 1767 selfloop flow, removed 81 redundant places. [2022-11-25 17:18:11,260 INFO L231 Difference]: Finished difference. Result has 375 places, 600 transitions, 9329 flow [2022-11-25 17:18:11,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=9329, PETRI_PLACES=375, PETRI_TRANSITIONS=600} [2022-11-25 17:18:11,260 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2022-11-25 17:18:11,261 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 600 transitions, 9329 flow [2022-11-25 17:18:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:11,261 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:11,261 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:11,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:11,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:18:11,467 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:18:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1368471400, now seen corresponding path program 10 times [2022-11-25 17:18:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:11,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881993753] [2022-11-25 17:18:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:11,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:12,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881993753] [2022-11-25 17:18:12,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881993753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:12,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911320133] [2022-11-25 17:18:12,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:18:12,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:12,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:12,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:18:12,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:18:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:18:12,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:12,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:14,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911320133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:14,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:14,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:18:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397922892] [2022-11-25 17:18:14,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:14,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:18:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:18:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:18:14,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:18:14,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 600 transitions, 9329 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:14,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:18:14,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:20,961 INFO L130 PetriNetUnfolder]: 4540/8483 cut-off events. [2022-11-25 17:18:20,961 INFO L131 PetriNetUnfolder]: For 240229/241103 co-relation queries the response was YES. [2022-11-25 17:18:21,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67124 conditions, 8483 events. 4540/8483 cut-off events. For 240229/241103 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64026 event pairs, 80 based on Foata normal form. 388/8784 useless extension candidates. Maximal degree in co-relation 66628. Up to 2604 conditions per place. [2022-11-25 17:18:21,091 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 548 selfloop transitions, 282 changer transitions 156/1019 dead transitions. [2022-11-25 17:18:21,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1019 transitions, 17664 flow [2022-11-25 17:18:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 17:18:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-25 17:18:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 6149 transitions. [2022-11-25 17:18:21,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45514433752775724 [2022-11-25 17:18:21,103 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 6149 transitions. [2022-11-25 17:18:21,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 6149 transitions. [2022-11-25 17:18:21,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:21,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 6149 transitions. [2022-11-25 17:18:21,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 87.84285714285714) internal successors, (6149), 70 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:21,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 193.0) internal successors, (13703), 71 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:21,136 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 193.0) internal successors, (13703), 71 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:21,136 INFO L175 Difference]: Start difference. First operand has 375 places, 600 transitions, 9329 flow. Second operand 70 states and 6149 transitions. [2022-11-25 17:18:21,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1019 transitions, 17664 flow [2022-11-25 17:18:21,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1019 transitions, 15305 flow, removed 1140 selfloop flow, removed 42 redundant places. [2022-11-25 17:18:21,922 INFO L231 Difference]: Finished difference. Result has 395 places, 679 transitions, 11154 flow [2022-11-25 17:18:21,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=8726, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=11154, PETRI_PLACES=395, PETRI_TRANSITIONS=679} [2022-11-25 17:18:21,923 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2022-11-25 17:18:21,923 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 679 transitions, 11154 flow [2022-11-25 17:18:21,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:21,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:21,924 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:21,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:18:22,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:18:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1482065314, now seen corresponding path program 11 times [2022-11-25 17:18:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:22,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850756127] [2022-11-25 17:18:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:22,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850756127] [2022-11-25 17:18:22,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850756127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:22,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140316013] [2022-11-25 17:18:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:18:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:22,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:22,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:18:22,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:18:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:18:22,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140316013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:24,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:24,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:18:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545811014] [2022-11-25 17:18:24,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:18:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:18:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:18:25,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:18:25,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 679 transitions, 11154 flow. Second operand has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:25,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:25,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:18:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:32,886 INFO L130 PetriNetUnfolder]: 5269/9853 cut-off events. [2022-11-25 17:18:32,886 INFO L131 PetriNetUnfolder]: For 176402/176674 co-relation queries the response was YES. [2022-11-25 17:18:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69288 conditions, 9853 events. 5269/9853 cut-off events. For 176402/176674 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75707 event pairs, 352 based on Foata normal form. 278/9990 useless extension candidates. Maximal degree in co-relation 69180. Up to 3083 conditions per place. [2022-11-25 17:18:33,028 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 571 selfloop transitions, 351 changer transitions 167/1111 dead transitions. [2022-11-25 17:18:33,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1111 transitions, 18351 flow [2022-11-25 17:18:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:18:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-25 17:18:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5514 transitions. [2022-11-25 17:18:33,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46080561591174996 [2022-11-25 17:18:33,035 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5514 transitions. [2022-11-25 17:18:33,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5514 transitions. [2022-11-25 17:18:33,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:33,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5514 transitions. [2022-11-25 17:18:33,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 88.93548387096774) internal successors, (5514), 62 states have internal predecessors, (5514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 193.0) internal successors, (12159), 63 states have internal predecessors, (12159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,057 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 193.0) internal successors, (12159), 63 states have internal predecessors, (12159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,057 INFO L175 Difference]: Start difference. First operand has 395 places, 679 transitions, 11154 flow. Second operand 62 states and 5514 transitions. [2022-11-25 17:18:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1111 transitions, 18351 flow [2022-11-25 17:18:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1111 transitions, 16835 flow, removed 686 selfloop flow, removed 35 redundant places. [2022-11-25 17:18:34,108 INFO L231 Difference]: Finished difference. Result has 412 places, 753 transitions, 13019 flow [2022-11-25 17:18:34,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10464, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=13019, PETRI_PLACES=412, PETRI_TRANSITIONS=753} [2022-11-25 17:18:34,109 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2022-11-25 17:18:34,109 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 753 transitions, 13019 flow [2022-11-25 17:18:34,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:34,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:34,109 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:34,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 17:18:34,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:34,310 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:18:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1369331187, now seen corresponding path program 4 times [2022-11-25 17:18:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392194534] [2022-11-25 17:18:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392194534] [2022-11-25 17:18:36,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392194534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104385883] [2022-11-25 17:18:36,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:18:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:36,049 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:18:36,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:18:36,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:18:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:36,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104385883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:38,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:38,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 17:18:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014143553] [2022-11-25 17:18:38,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:18:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:18:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:18:38,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 193 [2022-11-25 17:18:38,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 753 transitions, 13019 flow. Second operand has 30 states, 30 states have (on average 86.36666666666666) internal successors, (2591), 30 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:38,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:38,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 193 [2022-11-25 17:18:38,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:46,655 INFO L130 PetriNetUnfolder]: 5682/10518 cut-off events. [2022-11-25 17:18:46,655 INFO L131 PetriNetUnfolder]: For 204970/205563 co-relation queries the response was YES. [2022-11-25 17:18:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77024 conditions, 10518 events. 5682/10518 cut-off events. For 204970/205563 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 80213 event pairs, 242 based on Foata normal form. 549/10961 useless extension candidates. Maximal degree in co-relation 76935. Up to 3957 conditions per place. [2022-11-25 17:18:46,800 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 812 selfloop transitions, 217 changer transitions 182/1250 dead transitions. [2022-11-25 17:18:46,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1250 transitions, 22648 flow [2022-11-25 17:18:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-25 17:18:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-25 17:18:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6771 transitions. [2022-11-25 17:18:46,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4677720207253886 [2022-11-25 17:18:46,810 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6771 transitions. [2022-11-25 17:18:46,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6771 transitions. [2022-11-25 17:18:46,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:46,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6771 transitions. [2022-11-25 17:18:46,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 90.28) internal successors, (6771), 75 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 193.0) internal successors, (14668), 76 states have internal predecessors, (14668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,836 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 193.0) internal successors, (14668), 76 states have internal predecessors, (14668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,836 INFO L175 Difference]: Start difference. First operand has 412 places, 753 transitions, 13019 flow. Second operand 75 states and 6771 transitions. [2022-11-25 17:18:46,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1250 transitions, 22648 flow [2022-11-25 17:18:47,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1250 transitions, 21130 flow, removed 693 selfloop flow, removed 37 redundant places. [2022-11-25 17:18:47,681 INFO L231 Difference]: Finished difference. Result has 443 places, 849 transitions, 15110 flow [2022-11-25 17:18:47,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=12355, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=15110, PETRI_PLACES=443, PETRI_TRANSITIONS=849} [2022-11-25 17:18:47,682 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2022-11-25 17:18:47,682 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 849 transitions, 15110 flow [2022-11-25 17:18:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.36666666666666) internal successors, (2591), 30 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:47,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:47,683 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:47,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:47,884 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:18:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1186391182, now seen corresponding path program 12 times [2022-11-25 17:18:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722078808] [2022-11-25 17:18:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:48,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:48,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722078808] [2022-11-25 17:18:48,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722078808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:48,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143042624] [2022-11-25 17:18:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:18:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:49,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:49,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:18:49,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-25 17:18:49,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:18:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:49,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:51,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143042624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:51,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:51,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 17:18:51,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628487342] [2022-11-25 17:18:51,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:51,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:18:51,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:18:51,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:18:52,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 193 [2022-11-25 17:18:52,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 849 transitions, 15110 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:52,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:52,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 193 [2022-11-25 17:18:52,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:10,055 INFO L130 PetriNetUnfolder]: 11747/19510 cut-off events. [2022-11-25 17:19:10,055 INFO L131 PetriNetUnfolder]: For 369411/369411 co-relation queries the response was YES. [2022-11-25 17:19:10,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134187 conditions, 19510 events. 11747/19510 cut-off events. For 369411/369411 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 139659 event pairs, 621 based on Foata normal form. 332/19842 useless extension candidates. Maximal degree in co-relation 132940. Up to 6354 conditions per place. [2022-11-25 17:19:10,325 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 1009 selfloop transitions, 524 changer transitions 360/1893 dead transitions. [2022-11-25 17:19:10,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1893 transitions, 32812 flow [2022-11-25 17:19:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-25 17:19:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2022-11-25 17:19:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 12050 transitions. [2022-11-25 17:19:10,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4428030720611472 [2022-11-25 17:19:10,338 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 12050 transitions. [2022-11-25 17:19:10,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 12050 transitions. [2022-11-25 17:19:10,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:10,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 12050 transitions. [2022-11-25 17:19:10,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 85.46099290780141) internal successors, (12050), 141 states have internal predecessors, (12050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:10,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 193.0) internal successors, (27406), 142 states have internal predecessors, (27406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:10,380 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 193.0) internal successors, (27406), 142 states have internal predecessors, (27406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:10,380 INFO L175 Difference]: Start difference. First operand has 443 places, 849 transitions, 15110 flow. Second operand 141 states and 12050 transitions. [2022-11-25 17:19:10,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1893 transitions, 32812 flow [2022-11-25 17:19:11,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1893 transitions, 31669 flow, removed 546 selfloop flow, removed 24 redundant places. [2022-11-25 17:19:11,960 INFO L231 Difference]: Finished difference. Result has 609 places, 1078 transitions, 21187 flow [2022-11-25 17:19:11,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=14353, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=21187, PETRI_PLACES=609, PETRI_TRANSITIONS=1078} [2022-11-25 17:19:11,962 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 579 predicate places. [2022-11-25 17:19:11,962 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1078 transitions, 21187 flow [2022-11-25 17:19:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:11,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:11,963 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:11,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 17:19:12,169 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:19:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1614236274, now seen corresponding path program 13 times [2022-11-25 17:19:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596268398] [2022-11-25 17:19:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596268398] [2022-11-25 17:19:13,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596268398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764800758] [2022-11-25 17:19:13,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:19:13,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:13,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:13,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:13,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:19:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:19:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:14,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:16,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764800758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:16,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:16,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-25 17:19:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766209759] [2022-11-25 17:19:16,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:19:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:19:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:19:16,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:19:17,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1078 transitions, 21187 flow. Second operand has 31 states, 31 states have (on average 83.96774193548387) internal successors, (2603), 31 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:17,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:17,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:19:17,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:32,760 INFO L130 PetriNetUnfolder]: 8771/16435 cut-off events. [2022-11-25 17:19:32,760 INFO L131 PetriNetUnfolder]: For 1410887/1412461 co-relation queries the response was YES. [2022-11-25 17:19:33,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180084 conditions, 16435 events. 8771/16435 cut-off events. For 1410887/1412461 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 136672 event pairs, 450 based on Foata normal form. 600/16828 useless extension candidates. Maximal degree in co-relation 179669. Up to 4750 conditions per place. [2022-11-25 17:19:33,187 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 918 selfloop transitions, 577 changer transitions 253/1794 dead transitions. [2022-11-25 17:19:33,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1794 transitions, 37247 flow [2022-11-25 17:19:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-25 17:19:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-11-25 17:19:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 8023 transitions. [2022-11-25 17:19:33,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46188831318365 [2022-11-25 17:19:33,197 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 8023 transitions. [2022-11-25 17:19:33,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 8023 transitions. [2022-11-25 17:19:33,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:33,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 8023 transitions. [2022-11-25 17:19:33,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 89.14444444444445) internal successors, (8023), 90 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 193.0) internal successors, (17563), 91 states have internal predecessors, (17563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,224 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 193.0) internal successors, (17563), 91 states have internal predecessors, (17563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,224 INFO L175 Difference]: Start difference. First operand has 609 places, 1078 transitions, 21187 flow. Second operand 90 states and 8023 transitions. [2022-11-25 17:19:33,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1794 transitions, 37247 flow [2022-11-25 17:19:40,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1794 transitions, 31250 flow, removed 2911 selfloop flow, removed 77 redundant places. [2022-11-25 17:19:40,194 INFO L231 Difference]: Finished difference. Result has 574 places, 1226 transitions, 23718 flow [2022-11-25 17:19:40,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=18688, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=23718, PETRI_PLACES=574, PETRI_TRANSITIONS=1226} [2022-11-25 17:19:40,195 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 544 predicate places. [2022-11-25 17:19:40,195 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1226 transitions, 23718 flow [2022-11-25 17:19:40,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.96774193548387) internal successors, (2603), 31 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:40,196 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:40,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:40,397 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:19:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 397523418, now seen corresponding path program 14 times [2022-11-25 17:19:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100660270] [2022-11-25 17:19:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:41,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100660270] [2022-11-25 17:19:41,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100660270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632574604] [2022-11-25 17:19:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:41,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:41,239 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:41,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:19:41,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:41,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:41,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:19:41,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:42,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632574604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:44,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:44,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-25 17:19:44,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184280454] [2022-11-25 17:19:44,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:19:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:19:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:19:44,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:19:44,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1226 transitions, 23718 flow. Second operand has 31 states, 31 states have (on average 84.45161290322581) internal successors, (2618), 31 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:44,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:44,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:19:44,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:00,089 INFO L130 PetriNetUnfolder]: 8951/16751 cut-off events. [2022-11-25 17:20:00,089 INFO L131 PetriNetUnfolder]: For 461249/462755 co-relation queries the response was YES. [2022-11-25 17:20:00,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141416 conditions, 16751 events. 8951/16751 cut-off events. For 461249/462755 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 139955 event pairs, 340 based on Foata normal form. 818/17271 useless extension candidates. Maximal degree in co-relation 141273. Up to 4855 conditions per place. [2022-11-25 17:20:00,552 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 987 selfloop transitions, 495 changer transitions 257/1796 dead transitions. [2022-11-25 17:20:00,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1796 transitions, 36928 flow [2022-11-25 17:20:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-25 17:20:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-25 17:20:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7554 transitions. [2022-11-25 17:20:00,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4551150741053139 [2022-11-25 17:20:00,561 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7554 transitions. [2022-11-25 17:20:00,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7554 transitions. [2022-11-25 17:20:00,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:00,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7554 transitions. [2022-11-25 17:20:00,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 87.83720930232558) internal successors, (7554), 86 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 193.0) internal successors, (16791), 87 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,586 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 193.0) internal successors, (16791), 87 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,586 INFO L175 Difference]: Start difference. First operand has 574 places, 1226 transitions, 23718 flow. Second operand 86 states and 7554 transitions. [2022-11-25 17:20:00,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1796 transitions, 36928 flow [2022-11-25 17:20:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1796 transitions, 33332 flow, removed 1728 selfloop flow, removed 34 redundant places. [2022-11-25 17:20:04,079 INFO L231 Difference]: Finished difference. Result has 636 places, 1316 transitions, 25632 flow [2022-11-25 17:20:04,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=21636, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=25632, PETRI_PLACES=636, PETRI_TRANSITIONS=1316} [2022-11-25 17:20:04,081 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 606 predicate places. [2022-11-25 17:20:04,081 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 1316 transitions, 25632 flow [2022-11-25 17:20:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.45161290322581) internal successors, (2618), 31 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:04,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:04,081 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:04,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:04,282 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:20:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash -464937639, now seen corresponding path program 15 times [2022-11-25 17:20:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:04,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345031889] [2022-11-25 17:20:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345031889] [2022-11-25 17:20:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345031889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287402281] [2022-11-25 17:20:05,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:20:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:05,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:05,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:05,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:20:05,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 17:20:05,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:20:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:05,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:08,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287402281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:08,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:08,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 17:20:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39825057] [2022-11-25 17:20:08,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:20:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:20:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:20:08,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 193 [2022-11-25 17:20:08,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1316 transitions, 25632 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:08,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:08,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 193 [2022-11-25 17:20:08,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:36,262 INFO L130 PetriNetUnfolder]: 16348/27117 cut-off events. [2022-11-25 17:20:36,263 INFO L131 PetriNetUnfolder]: For 805365/805365 co-relation queries the response was YES. [2022-11-25 17:20:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208844 conditions, 27117 events. 16348/27117 cut-off events. For 805365/805365 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 203012 event pairs, 1201 based on Foata normal form. 362/27479 useless extension candidates. Maximal degree in co-relation 208620. Up to 10570 conditions per place. [2022-11-25 17:20:36,915 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 1363 selfloop transitions, 542 changer transitions 393/2298 dead transitions. [2022-11-25 17:20:36,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 2298 transitions, 47273 flow [2022-11-25 17:20:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-25 17:20:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-11-25 17:20:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 12693 transitions. [2022-11-25 17:20:36,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4413881837465661 [2022-11-25 17:20:36,927 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 12693 transitions. [2022-11-25 17:20:36,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 12693 transitions. [2022-11-25 17:20:36,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:36,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 12693 transitions. [2022-11-25 17:20:36,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 85.18791946308725) internal successors, (12693), 149 states have internal predecessors, (12693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 193.0) internal successors, (28950), 150 states have internal predecessors, (28950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,970 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 193.0) internal successors, (28950), 150 states have internal predecessors, (28950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,970 INFO L175 Difference]: Start difference. First operand has 636 places, 1316 transitions, 25632 flow. Second operand 149 states and 12693 transitions. [2022-11-25 17:20:36,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 2298 transitions, 47273 flow [2022-11-25 17:20:44,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 2298 transitions, 45802 flow, removed 636 selfloop flow, removed 50 redundant places. [2022-11-25 17:20:44,042 INFO L231 Difference]: Finished difference. Result has 780 places, 1507 transitions, 31445 flow [2022-11-25 17:20:44,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=24569, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=31445, PETRI_PLACES=780, PETRI_TRANSITIONS=1507} [2022-11-25 17:20:44,044 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 750 predicate places. [2022-11-25 17:20:44,044 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1507 transitions, 31445 flow [2022-11-25 17:20:44,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:44,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:44,045 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:44,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:44,251 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:20:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1270275302, now seen corresponding path program 16 times [2022-11-25 17:20:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596620244] [2022-11-25 17:20:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:47,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:47,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596620244] [2022-11-25 17:20:47,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596620244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:47,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082561717] [2022-11-25 17:20:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:20:47,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:47,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:47,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:47,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5ba9631-9243-44e0-ab10-fa466e69fe0a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:20:48,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:20:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:20:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:48,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082561717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:52,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:52,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-25 17:20:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809748453] [2022-11-25 17:20:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:20:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:20:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:20:52,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 17:20:52,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1507 transitions, 31445 flow. Second operand has 29 states, 29 states have (on average 84.06896551724138) internal successors, (2438), 29 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:52,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:52,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 17:20:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand