./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS --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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- 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-4e7fbc6 [2022-11-23 03:59:18,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:59:18,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:59:18,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:59:18,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:59:18,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:59:18,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:59:18,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:59:18,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:59:18,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:59:18,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:59:18,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:59:18,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:59:18,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:59:18,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:59:18,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:59:18,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:59:18,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:59:18,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:59:18,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:59:18,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:59:18,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:59:18,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:59:18,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:59:18,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:59:18,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:59:18,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:59:18,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:59:18,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:59:18,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:59:18,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:59:18,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:59:18,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:59:18,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:59:18,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:59:18,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:59:18,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:59:18,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:59:18,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:59:18,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:59:18,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:59:18,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:59:18,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:59:18,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:59:18,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:59:18,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:59:18,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:59:18,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:59:18,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:59:18,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:59:18,845 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:59:18,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:59:18,845 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:59:18,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:59:18,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:59:18,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:59:18,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:59:18,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:59:18,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:59:18,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:59:18,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:59:18,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:59:18,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:59:18,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:59:18,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:59:18,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:59:18,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:59:18,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:59:18,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:59:18,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:59:18,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:59:18,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:59:18,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:59:18,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:59:18,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:59:18,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:59:18,850 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_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-11-23 03:59:19,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:59:19,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:59:19,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:59:19,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:59:19,133 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:59:19,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-23 03:59:22,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:59:22,370 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:59:22,370 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-23 03:59:22,377 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/data/a6a7e248c/ac01b5d887074044b443585add9876e1/FLAGdcfb4aaff [2022-11-23 03:59:22,393 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/data/a6a7e248c/ac01b5d887074044b443585add9876e1 [2022-11-23 03:59:22,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:59:22,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:59:22,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:59:22,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:59:22,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:59:22,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a18994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22, skipping insertion in model container [2022-11-23 03:59:22,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:59:22,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:59:22,647 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_a71dc438-c878-48ef-8c64-ba5c8566b6d9/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-23 03:59:22,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:59:22,666 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:59:22,695 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_a71dc438-c878-48ef-8c64-ba5c8566b6d9/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-23 03:59:22,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:59:22,718 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:59:22,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22 WrapperNode [2022-11-23 03:59:22,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:59:22,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:59:22,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:59:22,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:59:22,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,788 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-11-23 03:59:22,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:59:22,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:59:22,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:59:22,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:59:22,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:59:22,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:59:22,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:59:22,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:59:22,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (1/1) ... [2022-11-23 03:59:22,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:59:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:22,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:59:22,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:59:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:59:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:59:22,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:59:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:59:22,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:59:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:59:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:59:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:59:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:59:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:59:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:59:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:59:22,966 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:59:23,110 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:59:23,112 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:59:23,510 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:59:23,520 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:59:23,521 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:59:23,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:23 BoogieIcfgContainer [2022-11-23 03:59:23,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:59:23,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:59:23,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:59:23,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:59:23,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:59:22" (1/3) ... [2022-11-23 03:59:23,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1046bea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:23, skipping insertion in model container [2022-11-23 03:59:23,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:22" (2/3) ... [2022-11-23 03:59:23,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1046bea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:23, skipping insertion in model container [2022-11-23 03:59:23,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:23" (3/3) ... [2022-11-23 03:59:23,533 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-11-23 03:59:23,543 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:59:23,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:59:23,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:59:23,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:59:23,667 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:59:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 220 transitions, 456 flow [2022-11-23 03:59:23,857 INFO L130 PetriNetUnfolder]: 14/218 cut-off events. [2022-11-23 03:59:23,857 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:59:23,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 14/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 315 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-11-23 03:59:23,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 220 transitions, 456 flow [2022-11-23 03:59:23,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 209 transitions, 430 flow [2022-11-23 03:59:23,888 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:59:23,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 209 transitions, 430 flow [2022-11-23 03:59:23,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 209 transitions, 430 flow [2022-11-23 03:59:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 209 transitions, 430 flow [2022-11-23 03:59:23,998 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2022-11-23 03:59:23,998 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:59:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 14/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-11-23 03:59:24,009 INFO L119 LiptonReduction]: Number of co-enabled transitions 10692 [2022-11-23 03:59:31,931 INFO L134 LiptonReduction]: Checked pairs total: 8964 [2022-11-23 03:59:31,932 INFO L136 LiptonReduction]: Total number of compositions: 238 [2022-11-23 03:59:31,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:59:31,958 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;@498b0e6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:59:31,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:59:31,964 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-23 03:59:31,964 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:59:31,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:31,965 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:31,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1708791531, now seen corresponding path program 1 times [2022-11-23 03:59:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:31,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431159352] [2022-11-23 03:59:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:32,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431159352] [2022-11-23 03:59:32,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431159352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:59:32,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:59:32,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:59:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686770991] [2022-11-23 03:59:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:59:32,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:59:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:59:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:59:32,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 458 [2022-11-23 03:59:32,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:32,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:32,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 458 [2022-11-23 03:59:32,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:33,123 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2022-11-23 03:59:33,124 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-23 03:59:33,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2022-11-23 03:59:33,126 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2022-11-23 03:59:33,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2022-11-23 03:59:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 989 transitions. [2022-11-23 03:59:33,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4318777292576419 [2022-11-23 03:59:33,149 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 989 transitions. [2022-11-23 03:59:33,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 989 transitions. [2022-11-23 03:59:33,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:33,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 989 transitions. [2022-11-23 03:59:33,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,178 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 989 transitions. [2022-11-23 03:59:33,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2022-11-23 03:59:33,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:59:33,185 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2022-11-23 03:59:33,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-23 03:59:33,190 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-11-23 03:59:33,191 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2022-11-23 03:59:33,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:33,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:59:33,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -50305389, now seen corresponding path program 2 times [2022-11-23 03:59:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535020333] [2022-11-23 03:59:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:33,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:33,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:33,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535020333] [2022-11-23 03:59:33,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535020333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:59:33,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:59:33,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:59:33,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945321700] [2022-11-23 03:59:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:59:33,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:59:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:59:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:59:33,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 458 [2022-11-23 03:59:33,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:33,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 458 [2022-11-23 03:59:33,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:33,767 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2022-11-23 03:59:33,767 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-23 03:59:33,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 277 event pairs, 5 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2022-11-23 03:59:33,768 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2022-11-23 03:59:33,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2022-11-23 03:59:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 987 transitions. [2022-11-23 03:59:33,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4310043668122271 [2022-11-23 03:59:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 987 transitions. [2022-11-23 03:59:33,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 987 transitions. [2022-11-23 03:59:33,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:33,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 987 transitions. [2022-11-23 03:59:33,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.4) internal successors, (987), 5 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,782 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 987 transitions. [2022-11-23 03:59:33,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2022-11-23 03:59:33,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 03:59:33,784 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2022-11-23 03:59:33,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-11-23 03:59:33,785 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-11-23 03:59:33,786 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2022-11-23 03:59:33,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:33,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:33,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:33,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:59:33,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash 302069959, now seen corresponding path program 1 times [2022-11-23 03:59:33,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:33,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764784249] [2022-11-23 03:59:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:33,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764784249] [2022-11-23 03:59:33,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764784249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537092222] [2022-11-23 03:59:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:33,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:33,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:59:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:34,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:34,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537092222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:34,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:34,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-23 03:59:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001138360] [2022-11-23 03:59:34,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:59:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:59:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:59:34,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:34,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 195.5) internal successors, (1564), 8 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:34,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:34,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:34,348 INFO L130 PetriNetUnfolder]: 93/168 cut-off events. [2022-11-23 03:59:34,348 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-11-23 03:59:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 168 events. 93/168 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 504 event pairs, 12 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 510. Up to 71 conditions per place. [2022-11-23 03:59:34,352 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2022-11-23 03:59:34,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 287 flow [2022-11-23 03:59:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2022-11-23 03:59:34,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4388646288209607 [2022-11-23 03:59:34,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2022-11-23 03:59:34,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2022-11-23 03:59:34,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:34,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2022-11-23 03:59:34,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,365 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,366 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 1005 transitions. [2022-11-23 03:59:34,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 287 flow [2022-11-23 03:59:34,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 271 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-23 03:59:34,372 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 132 flow [2022-11-23 03:59:34,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2022-11-23 03:59:34,374 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-11-23 03:59:34,374 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 132 flow [2022-11-23 03:59:34,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 195.5) internal successors, (1564), 8 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:34,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:34,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:34,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -337708700, now seen corresponding path program 1 times [2022-11-23 03:59:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:34,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603314732] [2022-11-23 03:59:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:34,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:34,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603314732] [2022-11-23 03:59:34,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603314732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:59:34,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:59:34,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:59:34,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806991457] [2022-11-23 03:59:34,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:59:34,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:59:34,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:59:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:59:34,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 458 [2022-11-23 03:59:34,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:34,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 458 [2022-11-23 03:59:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:34,862 INFO L130 PetriNetUnfolder]: 114/211 cut-off events. [2022-11-23 03:59:34,862 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2022-11-23 03:59:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 211 events. 114/211 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 663 event pairs, 38 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 515. Up to 134 conditions per place. [2022-11-23 03:59:34,865 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 33 selfloop transitions, 11 changer transitions 6/50 dead transitions. [2022-11-23 03:59:34,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 355 flow [2022-11-23 03:59:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:59:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:59:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1205 transitions. [2022-11-23 03:59:34,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43850072780203786 [2022-11-23 03:59:34,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1205 transitions. [2022-11-23 03:59:34,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1205 transitions. [2022-11-23 03:59:34,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:34,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1205 transitions. [2022-11-23 03:59:34,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.83333333333334) internal successors, (1205), 6 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,880 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,880 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 132 flow. Second operand 6 states and 1205 transitions. [2022-11-23 03:59:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 355 flow [2022-11-23 03:59:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 348 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 03:59:34,884 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 212 flow [2022-11-23 03:59:34,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-11-23 03:59:34,885 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2022-11-23 03:59:34,885 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 212 flow [2022-11-23 03:59:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:34,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:34,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:59:34,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1609890364, now seen corresponding path program 2 times [2022-11-23 03:59:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552554537] [2022-11-23 03:59:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552554537] [2022-11-23 03:59:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552554537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:59:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:59:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:59:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688889523] [2022-11-23 03:59:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:59:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:59:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:59:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:59:35,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 458 [2022-11-23 03:59:35,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:35,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 458 [2022-11-23 03:59:35,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:35,116 INFO L130 PetriNetUnfolder]: 109/204 cut-off events. [2022-11-23 03:59:35,116 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2022-11-23 03:59:35,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 204 events. 109/204 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 40 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 828. Up to 130 conditions per place. [2022-11-23 03:59:35,118 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 36 selfloop transitions, 8 changer transitions 7/51 dead transitions. [2022-11-23 03:59:35,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 417 flow [2022-11-23 03:59:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1012 transitions. [2022-11-23 03:59:35,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44192139737991265 [2022-11-23 03:59:35,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1012 transitions. [2022-11-23 03:59:35,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1012 transitions. [2022-11-23 03:59:35,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:35,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1012 transitions. [2022-11-23 03:59:35,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,131 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 212 flow. Second operand 5 states and 1012 transitions. [2022-11-23 03:59:35,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 417 flow [2022-11-23 03:59:35,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 381 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-11-23 03:59:35,135 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 225 flow [2022-11-23 03:59:35,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2022-11-23 03:59:35,136 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2022-11-23 03:59:35,136 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 225 flow [2022-11-23 03:59:35,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:35,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:59:35,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1824592368, now seen corresponding path program 3 times [2022-11-23 03:59:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509072082] [2022-11-23 03:59:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:35,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509072082] [2022-11-23 03:59:35,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509072082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:59:35,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:59:35,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:59:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018592178] [2022-11-23 03:59:35,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:59:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:59:35,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:59:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:59:35,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 458 [2022-11-23 03:59:35,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:35,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 458 [2022-11-23 03:59:35,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:35,366 INFO L130 PetriNetUnfolder]: 100/191 cut-off events. [2022-11-23 03:59:35,366 INFO L131 PetriNetUnfolder]: For 541/541 co-relation queries the response was YES. [2022-11-23 03:59:35,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 191 events. 100/191 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 602 event pairs, 36 based on Foata normal form. 6/183 useless extension candidates. Maximal degree in co-relation 790. Up to 128 conditions per place. [2022-11-23 03:59:35,368 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 31 selfloop transitions, 8 changer transitions 7/46 dead transitions. [2022-11-23 03:59:35,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 389 flow [2022-11-23 03:59:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1007 transitions. [2022-11-23 03:59:35,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4397379912663755 [2022-11-23 03:59:35,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1007 transitions. [2022-11-23 03:59:35,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1007 transitions. [2022-11-23 03:59:35,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:35,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1007 transitions. [2022-11-23 03:59:35,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,380 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 225 flow. Second operand 5 states and 1007 transitions. [2022-11-23 03:59:35,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 389 flow [2022-11-23 03:59:35,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 371 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 03:59:35,384 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 219 flow [2022-11-23 03:59:35,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2022-11-23 03:59:35,385 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2022-11-23 03:59:35,385 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 219 flow [2022-11-23 03:59:35,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:35,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:35,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:59:35,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 235865898, now seen corresponding path program 4 times [2022-11-23 03:59:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:35,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108793114] [2022-11-23 03:59:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:35,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:35,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108793114] [2022-11-23 03:59:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108793114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:35,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749014602] [2022-11-23 03:59:35,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:59:35,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:35,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:35,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:59:35,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:59:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:35,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749014602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:35,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:35,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-23 03:59:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779539714] [2022-11-23 03:59:35,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:59:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:59:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:59:35,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:35,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 29 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 195.5) internal successors, (1564), 8 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:35,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:35,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:35,825 INFO L130 PetriNetUnfolder]: 100/181 cut-off events. [2022-11-23 03:59:35,825 INFO L131 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2022-11-23 03:59:35,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 181 events. 100/181 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 506 event pairs, 17 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 755. Up to 88 conditions per place. [2022-11-23 03:59:35,827 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 36 selfloop transitions, 10 changer transitions 0/46 dead transitions. [2022-11-23 03:59:35,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 390 flow [2022-11-23 03:59:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2022-11-23 03:59:35,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.437117903930131 [2022-11-23 03:59:35,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2022-11-23 03:59:35,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2022-11-23 03:59:35,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:35,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2022-11-23 03:59:35,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,839 INFO L175 Difference]: Start difference. First operand has 47 places, 29 transitions, 219 flow. Second operand 5 states and 1001 transitions. [2022-11-23 03:59:35,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 390 flow [2022-11-23 03:59:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 362 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-23 03:59:35,843 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 248 flow [2022-11-23 03:59:35,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2022-11-23 03:59:35,844 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2022-11-23 03:59:35,844 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 248 flow [2022-11-23 03:59:35,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 195.5) internal successors, (1564), 8 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:35,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:35,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:35,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:36,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:36,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -639663372, now seen corresponding path program 5 times [2022-11-23 03:59:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:36,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178515222] [2022-11-23 03:59:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:36,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178515222] [2022-11-23 03:59:36,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178515222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:36,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893790457] [2022-11-23 03:59:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:59:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:36,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:36,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:59:36,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:36,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:36,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:36,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893790457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:36,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:36,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:59:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218078850] [2022-11-23 03:59:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:59:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:59:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:59:36,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:36,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 248 flow. Second operand has 10 states, 10 states have (on average 195.5) internal successors, (1955), 10 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:36,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:36,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:36,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:36,545 INFO L130 PetriNetUnfolder]: 106/191 cut-off events. [2022-11-23 03:59:36,545 INFO L131 PetriNetUnfolder]: For 576/576 co-relation queries the response was YES. [2022-11-23 03:59:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 191 events. 106/191 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 547 event pairs, 39 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 826. Up to 133 conditions per place. [2022-11-23 03:59:36,547 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 34 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2022-11-23 03:59:36,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 394 flow [2022-11-23 03:59:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2022-11-23 03:59:36,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4366812227074236 [2022-11-23 03:59:36,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2022-11-23 03:59:36,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2022-11-23 03:59:36,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:36,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2022-11-23 03:59:36,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:36,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:36,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:36,560 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 248 flow. Second operand 5 states and 1000 transitions. [2022-11-23 03:59:36,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 394 flow [2022-11-23 03:59:36,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 380 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-23 03:59:36,564 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 271 flow [2022-11-23 03:59:36,564 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2022-11-23 03:59:36,565 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2022-11-23 03:59:36,565 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 271 flow [2022-11-23 03:59:36,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.5) internal successors, (1955), 10 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:36,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:36,567 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:36,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:36,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:36,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:36,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1943003881, now seen corresponding path program 2 times [2022-11-23 03:59:36,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:36,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031713217] [2022-11-23 03:59:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:36,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:36,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031713217] [2022-11-23 03:59:36,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031713217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908057363] [2022-11-23 03:59:36,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:59:36,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:36,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:36,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:59:36,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:36,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:36,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:37,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908057363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:37,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:59:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513113793] [2022-11-23 03:59:37,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:37,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:59:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:59:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:59:37,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:37,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 195.5) internal successors, (1955), 10 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:37,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:37,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:37,313 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2022-11-23 03:59:37,313 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2022-11-23 03:59:37,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 219 events. 122/219 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 662 event pairs, 19 based on Foata normal form. 6/207 useless extension candidates. Maximal degree in co-relation 962. Up to 112 conditions per place. [2022-11-23 03:59:37,315 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 48 selfloop transitions, 16 changer transitions 0/64 dead transitions. [2022-11-23 03:59:37,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 522 flow [2022-11-23 03:59:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:59:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:59:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1599 transitions. [2022-11-23 03:59:37,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43640829694323147 [2022-11-23 03:59:37,321 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1599 transitions. [2022-11-23 03:59:37,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1599 transitions. [2022-11-23 03:59:37,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:37,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1599 transitions. [2022-11-23 03:59:37,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,333 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,333 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 271 flow. Second operand 8 states and 1599 transitions. [2022-11-23 03:59:37,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 522 flow [2022-11-23 03:59:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 496 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-23 03:59:37,339 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 310 flow [2022-11-23 03:59:37,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=310, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2022-11-23 03:59:37,341 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2022-11-23 03:59:37,341 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 310 flow [2022-11-23 03:59:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.5) internal successors, (1955), 10 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:37,358 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:37,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 03:59:37,564 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 793109265, now seen corresponding path program 3 times [2022-11-23 03:59:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:37,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93815526] [2022-11-23 03:59:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:37,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:37,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93815526] [2022-11-23 03:59:37,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93815526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:37,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515251611] [2022-11-23 03:59:37,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:59:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:37,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:37,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:59:37,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:59:37,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:37,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:37,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515251611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:37,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:37,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:59:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751467469] [2022-11-23 03:59:37,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:59:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:59:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:59:37,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:37,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 310 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:37,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:37,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:37,993 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2022-11-23 03:59:37,993 INFO L131 PetriNetUnfolder]: For 745/745 co-relation queries the response was YES. [2022-11-23 03:59:37,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 203 events. 114/203 cut-off events. For 745/745 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 591 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 950. Up to 153 conditions per place. [2022-11-23 03:59:37,995 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2022-11-23 03:59:37,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 433 flow [2022-11-23 03:59:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:59:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:59:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 997 transitions. [2022-11-23 03:59:37,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43537117903930134 [2022-11-23 03:59:37,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 997 transitions. [2022-11-23 03:59:37,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 997 transitions. [2022-11-23 03:59:37,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:37,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 997 transitions. [2022-11-23 03:59:38,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.4) internal successors, (997), 5 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 458.0) internal successors, (2748), 6 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,006 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 310 flow. Second operand 5 states and 997 transitions. [2022-11-23 03:59:38,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 433 flow [2022-11-23 03:59:38,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 397 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-23 03:59:38,010 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 287 flow [2022-11-23 03:59:38,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2022-11-23 03:59:38,011 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2022-11-23 03:59:38,011 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 287 flow [2022-11-23 03:59:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:38,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:38,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:38,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1652907316, now seen corresponding path program 6 times [2022-11-23 03:59:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58572487] [2022-11-23 03:59:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58572487] [2022-11-23 03:59:38,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58572487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574179124] [2022-11-23 03:59:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:59:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:38,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:38,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:59:38,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 03:59:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:59:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:38,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:38,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574179124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:38,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:38,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:59:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327108730] [2022-11-23 03:59:38,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:59:38,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:59:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:59:38,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:38,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 287 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:38,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:38,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:38,726 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2022-11-23 03:59:38,726 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2022-11-23 03:59:38,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 193 events. 110/193 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 565 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 898. Up to 86 conditions per place. [2022-11-23 03:59:38,729 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2022-11-23 03:59:38,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 481 flow [2022-11-23 03:59:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:59:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:59:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1588 transitions. [2022-11-23 03:59:38,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334061135371179 [2022-11-23 03:59:38,735 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1588 transitions. [2022-11-23 03:59:38,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1588 transitions. [2022-11-23 03:59:38,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:38,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1588 transitions. [2022-11-23 03:59:38,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.5) internal successors, (1588), 8 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,748 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,748 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 287 flow. Second operand 8 states and 1588 transitions. [2022-11-23 03:59:38,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 481 flow [2022-11-23 03:59:38,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 434 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-23 03:59:38,752 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 285 flow [2022-11-23 03:59:38,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2022-11-23 03:59:38,753 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2022-11-23 03:59:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 285 flow [2022-11-23 03:59:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:38,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:38,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:38,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 03:59:38,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1018751834, now seen corresponding path program 1 times [2022-11-23 03:59:38,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:38,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844488410] [2022-11-23 03:59:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844488410] [2022-11-23 03:59:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844488410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019096828] [2022-11-23 03:59:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:39,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:39,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:59:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:40,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019096828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:40,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:40,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 03:59:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67790896] [2022-11-23 03:59:40,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:59:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:59:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:59:40,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:40,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 285 flow. Second operand has 11 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:40,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:40,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:40,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:40,525 INFO L130 PetriNetUnfolder]: 133/239 cut-off events. [2022-11-23 03:59:40,526 INFO L131 PetriNetUnfolder]: For 627/641 co-relation queries the response was YES. [2022-11-23 03:59:40,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 239 events. 133/239 cut-off events. For 627/641 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 809 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1052. Up to 168 conditions per place. [2022-11-23 03:59:40,528 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2022-11-23 03:59:40,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 525 flow [2022-11-23 03:59:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1335 transitions. [2022-11-23 03:59:40,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41640673736743605 [2022-11-23 03:59:40,532 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1335 transitions. [2022-11-23 03:59:40,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1335 transitions. [2022-11-23 03:59:40,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:40,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1335 transitions. [2022-11-23 03:59:40,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.71428571428572) internal successors, (1335), 7 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:40,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:40,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:40,541 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 285 flow. Second operand 7 states and 1335 transitions. [2022-11-23 03:59:40,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 525 flow [2022-11-23 03:59:40,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 476 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-23 03:59:40,545 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 376 flow [2022-11-23 03:59:40,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-11-23 03:59:40,548 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2022-11-23 03:59:40,548 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 376 flow [2022-11-23 03:59:40,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:40,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:40,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:40,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:40,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:59:40,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash -984779966, now seen corresponding path program 2 times [2022-11-23 03:59:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842113710] [2022-11-23 03:59:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:40,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842113710] [2022-11-23 03:59:41,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842113710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127800058] [2022-11-23 03:59:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:59:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:41,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:41,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:59:41,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:41,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:41,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:41,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127800058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:41,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:59:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188759426] [2022-11-23 03:59:41,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:41,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:41,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:41,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:41,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:41,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:42,189 INFO L130 PetriNetUnfolder]: 145/265 cut-off events. [2022-11-23 03:59:42,189 INFO L131 PetriNetUnfolder]: For 846/870 co-relation queries the response was YES. [2022-11-23 03:59:42,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 265 events. 145/265 cut-off events. For 846/870 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 947 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1244. Up to 172 conditions per place. [2022-11-23 03:59:42,192 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2022-11-23 03:59:42,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 610 flow [2022-11-23 03:59:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1340 transitions. [2022-11-23 03:59:42,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41796631316281974 [2022-11-23 03:59:42,197 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1340 transitions. [2022-11-23 03:59:42,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1340 transitions. [2022-11-23 03:59:42,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:42,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1340 transitions. [2022-11-23 03:59:42,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.42857142857142) internal successors, (1340), 7 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:42,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:42,206 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:42,206 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 376 flow. Second operand 7 states and 1340 transitions. [2022-11-23 03:59:42,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 610 flow [2022-11-23 03:59:42,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 579 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-23 03:59:42,212 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 447 flow [2022-11-23 03:59:42,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2022-11-23 03:59:42,213 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2022-11-23 03:59:42,213 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 447 flow [2022-11-23 03:59:42,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:42,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:42,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:42,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:42,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:59:42,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash -673390312, now seen corresponding path program 3 times [2022-11-23 03:59:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:42,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545017922] [2022-11-23 03:59:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:42,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545017922] [2022-11-23 03:59:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545017922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:42,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113086053] [2022-11-23 03:59:42,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:59:42,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:42,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:42,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:59:43,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:59:43,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113086053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:43,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:43,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:59:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481942446] [2022-11-23 03:59:43,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:43,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:43,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 447 flow. Second operand has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:43,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:43,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:43,810 INFO L130 PetriNetUnfolder]: 142/256 cut-off events. [2022-11-23 03:59:43,810 INFO L131 PetriNetUnfolder]: For 1215/1237 co-relation queries the response was YES. [2022-11-23 03:59:43,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 256 events. 142/256 cut-off events. For 1215/1237 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 908 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1293. Up to 172 conditions per place. [2022-11-23 03:59:43,813 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2022-11-23 03:59:43,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 644 flow [2022-11-23 03:59:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1336 transitions. [2022-11-23 03:59:43,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167186525265128 [2022-11-23 03:59:43,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1336 transitions. [2022-11-23 03:59:43,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1336 transitions. [2022-11-23 03:59:43,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:43,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1336 transitions. [2022-11-23 03:59:43,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:43,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:43,827 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:43,827 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 447 flow. Second operand 7 states and 1336 transitions. [2022-11-23 03:59:43,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 644 flow [2022-11-23 03:59:43,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 586 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-23 03:59:43,834 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 479 flow [2022-11-23 03:59:43,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2022-11-23 03:59:43,836 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2022-11-23 03:59:43,836 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 479 flow [2022-11-23 03:59:43,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:43,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:43,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:43,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:59:44,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 861093716, now seen corresponding path program 4 times [2022-11-23 03:59:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872537339] [2022-11-23 03:59:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:44,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872537339] [2022-11-23 03:59:44,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872537339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:44,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425471760] [2022-11-23 03:59:44,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:59:44,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:44,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:44,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:59:44,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:59:44,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:44,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425471760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:44,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:44,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 03:59:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043007270] [2022-11-23 03:59:44,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:59:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:59:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:59:45,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:45,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 479 flow. Second operand has 11 states, 11 states have (on average 187.45454545454547) internal successors, (2062), 11 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:45,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:45,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:45,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:45,383 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2022-11-23 03:59:45,383 INFO L131 PetriNetUnfolder]: For 1454/1476 co-relation queries the response was YES. [2022-11-23 03:59:45,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 298 events. 166/298 cut-off events. For 1454/1476 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1119 event pairs, 10 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 1567. Up to 244 conditions per place. [2022-11-23 03:59:45,386 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2022-11-23 03:59:45,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 737 flow [2022-11-23 03:59:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1327 transitions. [2022-11-23 03:59:45,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4139114160948222 [2022-11-23 03:59:45,391 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1327 transitions. [2022-11-23 03:59:45,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1327 transitions. [2022-11-23 03:59:45,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:45,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1327 transitions. [2022-11-23 03:59:45,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.57142857142858) internal successors, (1327), 7 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:45,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:45,401 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:45,401 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 479 flow. Second operand 7 states and 1327 transitions. [2022-11-23 03:59:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 737 flow [2022-11-23 03:59:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 688 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-23 03:59:45,411 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 588 flow [2022-11-23 03:59:45,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2022-11-23 03:59:45,413 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2022-11-23 03:59:45,413 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 588 flow [2022-11-23 03:59:45,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 187.45454545454547) internal successors, (2062), 11 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:45,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:45,415 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:45,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:45,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:59:45,621 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash 19815834, now seen corresponding path program 5 times [2022-11-23 03:59:45,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549015572] [2022-11-23 03:59:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:45,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549015572] [2022-11-23 03:59:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549015572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007315451] [2022-11-23 03:59:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:59:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:46,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:46,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:59:46,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:59:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:46,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007315451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:46,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:46,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:59:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157784932] [2022-11-23 03:59:46,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:46,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:46,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:46,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 588 flow. Second operand has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:46,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:46,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:47,040 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2022-11-23 03:59:47,040 INFO L131 PetriNetUnfolder]: For 1756/1778 co-relation queries the response was YES. [2022-11-23 03:59:47,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 326 events. 180/326 cut-off events. For 1756/1778 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1260 event pairs, 10 based on Foata normal form. 9/327 useless extension candidates. Maximal degree in co-relation 1788. Up to 248 conditions per place. [2022-11-23 03:59:47,044 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2022-11-23 03:59:47,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 851 flow [2022-11-23 03:59:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1334 transitions. [2022-11-23 03:59:47,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4160948222083593 [2022-11-23 03:59:47,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1334 transitions. [2022-11-23 03:59:47,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1334 transitions. [2022-11-23 03:59:47,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:47,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1334 transitions. [2022-11-23 03:59:47,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:47,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:47,059 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:47,059 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 588 flow. Second operand 7 states and 1334 transitions. [2022-11-23 03:59:47,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 851 flow [2022-11-23 03:59:47,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 810 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-11-23 03:59:47,068 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 665 flow [2022-11-23 03:59:47,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2022-11-23 03:59:47,069 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2022-11-23 03:59:47,069 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 665 flow [2022-11-23 03:59:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:47,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:47,071 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:47,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 03:59:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:47,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -7889796, now seen corresponding path program 6 times [2022-11-23 03:59:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:47,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125120834] [2022-11-23 03:59:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125120834] [2022-11-23 03:59:47,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125120834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:47,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961289987] [2022-11-23 03:59:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:59:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:47,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:47,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:59:47,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 03:59:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 03:59:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961289987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:48,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:59:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254025168] [2022-11-23 03:59:48,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:48,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 03:59:48,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 665 flow. Second operand has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:48,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:48,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 03:59:48,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:48,684 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2022-11-23 03:59:48,684 INFO L131 PetriNetUnfolder]: For 2087/2109 co-relation queries the response was YES. [2022-11-23 03:59:48,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1844 conditions, 317 events. 177/317 cut-off events. For 2087/2109 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1211 event pairs, 10 based on Foata normal form. 9/318 useless extension candidates. Maximal degree in co-relation 1811. Up to 248 conditions per place. [2022-11-23 03:59:48,688 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2022-11-23 03:59:48,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 888 flow [2022-11-23 03:59:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1332 transitions. [2022-11-23 03:59:48,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41547099189020587 [2022-11-23 03:59:48,694 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1332 transitions. [2022-11-23 03:59:48,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1332 transitions. [2022-11-23 03:59:48,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:48,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1332 transitions. [2022-11-23 03:59:48,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:48,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:48,705 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:48,705 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 665 flow. Second operand 7 states and 1332 transitions. [2022-11-23 03:59:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 888 flow [2022-11-23 03:59:48,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 808 flow, removed 31 selfloop flow, removed 3 redundant places. [2022-11-23 03:59:48,714 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 685 flow [2022-11-23 03:59:48,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2022-11-23 03:59:48,715 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2022-11-23 03:59:48,715 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 685 flow [2022-11-23 03:59:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.23076923076923) internal successors, (2434), 13 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:48,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:48,717 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:48,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 03:59:48,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 607554373, now seen corresponding path program 7 times [2022-11-23 03:59:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:48,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900698696] [2022-11-23 03:59:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:49,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900698696] [2022-11-23 03:59:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900698696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203953568] [2022-11-23 03:59:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:59:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:49,011 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:49,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:59:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:49,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:49,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203953568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:49,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:49,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 03:59:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193936380] [2022-11-23 03:59:49,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:49,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:49,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:49,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 685 flow. Second operand has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:49,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:49,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:49,760 INFO L130 PetriNetUnfolder]: 265/498 cut-off events. [2022-11-23 03:59:49,760 INFO L131 PetriNetUnfolder]: For 3243/3243 co-relation queries the response was YES. [2022-11-23 03:59:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2771 conditions, 498 events. 265/498 cut-off events. For 3243/3243 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2175 event pairs, 33 based on Foata normal form. 8/506 useless extension candidates. Maximal degree in co-relation 2735. Up to 157 conditions per place. [2022-11-23 03:59:49,766 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 98 selfloop transitions, 64 changer transitions 6/168 dead transitions. [2022-11-23 03:59:49,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 168 transitions, 1722 flow [2022-11-23 03:59:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:59:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:59:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3578 transitions. [2022-11-23 03:59:49,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43401261523532264 [2022-11-23 03:59:49,775 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3578 transitions. [2022-11-23 03:59:49,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3578 transitions. [2022-11-23 03:59:49,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:49,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3578 transitions. [2022-11-23 03:59:49,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.77777777777777) internal successors, (3578), 18 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:49,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:49,849 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:49,850 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 685 flow. Second operand 18 states and 3578 transitions. [2022-11-23 03:59:49,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 168 transitions, 1722 flow [2022-11-23 03:59:49,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 168 transitions, 1615 flow, removed 35 selfloop flow, removed 4 redundant places. [2022-11-23 03:59:49,870 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 1191 flow [2022-11-23 03:59:49,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1191, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2022-11-23 03:59:49,871 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-11-23 03:59:49,871 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 1191 flow [2022-11-23 03:59:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:49,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:49,872 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:49,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:59:50,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash -767903257, now seen corresponding path program 8 times [2022-11-23 03:59:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:50,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196691789] [2022-11-23 03:59:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:50,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196691789] [2022-11-23 03:59:50,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196691789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555985317] [2022-11-23 03:59:50,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:59:50,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:50,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:50,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:59:50,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:50,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:50,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555985317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:50,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:50,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-23 03:59:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875663042] [2022-11-23 03:59:50,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:59:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:59:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:59:50,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:50,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 1191 flow. Second operand has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:50,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:50,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:50,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:50,774 INFO L130 PetriNetUnfolder]: 246/457 cut-off events. [2022-11-23 03:59:50,774 INFO L131 PetriNetUnfolder]: For 3587/3587 co-relation queries the response was YES. [2022-11-23 03:59:50,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 457 events. 246/457 cut-off events. For 3587/3587 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1924 event pairs, 33 based on Foata normal form. 4/461 useless extension candidates. Maximal degree in co-relation 2786. Up to 133 conditions per place. [2022-11-23 03:59:50,780 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 65 selfloop transitions, 61 changer transitions 10/136 dead transitions. [2022-11-23 03:59:50,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 136 transitions, 1671 flow [2022-11-23 03:59:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:59:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:59:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2185 transitions. [2022-11-23 03:59:50,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4337038507344184 [2022-11-23 03:59:50,785 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2185 transitions. [2022-11-23 03:59:50,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2185 transitions. [2022-11-23 03:59:50,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:50,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2185 transitions. [2022-11-23 03:59:50,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 198.63636363636363) internal successors, (2185), 11 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:50,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:50,797 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:50,797 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 1191 flow. Second operand 11 states and 2185 transitions. [2022-11-23 03:59:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 136 transitions, 1671 flow [2022-11-23 03:59:50,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 136 transitions, 1507 flow, removed 59 selfloop flow, removed 4 redundant places. [2022-11-23 03:59:50,817 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 1251 flow [2022-11-23 03:59:50,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1251, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2022-11-23 03:59:50,818 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2022-11-23 03:59:50,818 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 1251 flow [2022-11-23 03:59:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:50,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:50,820 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:50,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:51,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:51,025 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash 394005876, now seen corresponding path program 9 times [2022-11-23 03:59:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:51,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465777353] [2022-11-23 03:59:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465777353] [2022-11-23 03:59:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465777353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845634672] [2022-11-23 03:59:51,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:59:51,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:51,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:51,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:59:51,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:59:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:51,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:51,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845634672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:51,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:51,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-23 03:59:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380148249] [2022-11-23 03:59:51,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:59:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:59:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:59:51,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:51,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 1251 flow. Second operand has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:51,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:51,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:51,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:51,654 INFO L130 PetriNetUnfolder]: 256/471 cut-off events. [2022-11-23 03:59:51,654 INFO L131 PetriNetUnfolder]: For 3733/3733 co-relation queries the response was YES. [2022-11-23 03:59:51,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 471 events. 256/471 cut-off events. For 3733/3733 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1968 event pairs, 19 based on Foata normal form. 6/477 useless extension candidates. Maximal degree in co-relation 2926. Up to 200 conditions per place. [2022-11-23 03:59:51,659 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 91 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2022-11-23 03:59:51,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 132 transitions, 1737 flow [2022-11-23 03:59:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:59:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:59:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1404 transitions. [2022-11-23 03:59:51,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4379288833437305 [2022-11-23 03:59:51,663 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1404 transitions. [2022-11-23 03:59:51,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1404 transitions. [2022-11-23 03:59:51,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:51,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1404 transitions. [2022-11-23 03:59:51,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.57142857142858) internal successors, (1404), 7 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:51,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:51,670 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:51,670 INFO L175 Difference]: Start difference. First operand has 109 places, 102 transitions, 1251 flow. Second operand 7 states and 1404 transitions. [2022-11-23 03:59:51,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 132 transitions, 1737 flow [2022-11-23 03:59:51,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1622 flow, removed 20 selfloop flow, removed 10 redundant places. [2022-11-23 03:59:51,692 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 1259 flow [2022-11-23 03:59:51,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1259, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2022-11-23 03:59:51,693 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2022-11-23 03:59:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 1259 flow [2022-11-23 03:59:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:51,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:51,694 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:51,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:51,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 217876048, now seen corresponding path program 10 times [2022-11-23 03:59:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836559019] [2022-11-23 03:59:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:51,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836559019] [2022-11-23 03:59:51,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836559019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915636852] [2022-11-23 03:59:51,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:59:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:52,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:52,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:59:52,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:59:52,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:52,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:52,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915636852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:52,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:52,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:59:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135314434] [2022-11-23 03:59:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:59:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:59:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:59:52,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:52,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 1259 flow. Second operand has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:52,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:52,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:52,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:52,733 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2022-11-23 03:59:52,733 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-11-23 03:59:52,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3895 conditions, 591 events. 316/591 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2638 event pairs, 17 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3854. Up to 303 conditions per place. [2022-11-23 03:59:52,740 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 122 selfloop transitions, 50 changer transitions 0/172 dead transitions. [2022-11-23 03:59:52,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 2201 flow [2022-11-23 03:59:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:59:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:59:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2795 transitions. [2022-11-23 03:59:52,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43590143480973176 [2022-11-23 03:59:52,746 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2795 transitions. [2022-11-23 03:59:52,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2795 transitions. [2022-11-23 03:59:52,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:52,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2795 transitions. [2022-11-23 03:59:52,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.64285714285714) internal successors, (2795), 14 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:52,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:52,764 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:52,764 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 1259 flow. Second operand 14 states and 2795 transitions. [2022-11-23 03:59:52,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 2201 flow [2022-11-23 03:59:52,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 2027 flow, removed 50 selfloop flow, removed 4 redundant places. [2022-11-23 03:59:52,795 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 1526 flow [2022-11-23 03:59:52,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1526, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2022-11-23 03:59:52,795 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 99 predicate places. [2022-11-23 03:59:52,796 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 1526 flow [2022-11-23 03:59:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:52,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:52,797 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:52,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:53,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 03:59:53,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1970211721, now seen corresponding path program 11 times [2022-11-23 03:59:53,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:53,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785375730] [2022-11-23 03:59:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:53,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785375730] [2022-11-23 03:59:53,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785375730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294483300] [2022-11-23 03:59:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:59:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:53,097 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:53,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 03:59:53,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:53,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:53,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294483300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:53,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:53,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:59:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103334896] [2022-11-23 03:59:53,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:59:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:59:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:59:53,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:53,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 1526 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:53,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:53,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:53,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:53,879 INFO L130 PetriNetUnfolder]: 372/699 cut-off events. [2022-11-23 03:59:53,879 INFO L131 PetriNetUnfolder]: For 9329/9329 co-relation queries the response was YES. [2022-11-23 03:59:53,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4935 conditions, 699 events. 372/699 cut-off events. For 9329/9329 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3312 event pairs, 57 based on Foata normal form. 20/719 useless extension candidates. Maximal degree in co-relation 4890. Up to 243 conditions per place. [2022-11-23 03:59:53,888 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 112 selfloop transitions, 69 changer transitions 2/183 dead transitions. [2022-11-23 03:59:53,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 183 transitions, 2426 flow [2022-11-23 03:59:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:59:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:59:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3578 transitions. [2022-11-23 03:59:53,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43401261523532264 [2022-11-23 03:59:53,895 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3578 transitions. [2022-11-23 03:59:53,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3578 transitions. [2022-11-23 03:59:53,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:53,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3578 transitions. [2022-11-23 03:59:53,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.77777777777777) internal successors, (3578), 18 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:53,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:53,914 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:53,914 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 1526 flow. Second operand 18 states and 3578 transitions. [2022-11-23 03:59:53,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 183 transitions, 2426 flow [2022-11-23 03:59:53,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 183 transitions, 2192 flow, removed 97 selfloop flow, removed 6 redundant places. [2022-11-23 03:59:53,959 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 1704 flow [2022-11-23 03:59:53,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1704, PETRI_PLACES=133, PETRI_TRANSITIONS=125} [2022-11-23 03:59:53,960 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2022-11-23 03:59:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 1704 flow [2022-11-23 03:59:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:53,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:53,961 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:53,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:54,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:54,167 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1215308519, now seen corresponding path program 12 times [2022-11-23 03:59:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413115077] [2022-11-23 03:59:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:54,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:54,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413115077] [2022-11-23 03:59:54,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413115077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:54,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820566943] [2022-11-23 03:59:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:59:54,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:54,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:54,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 03:59:54,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:59:54,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:54,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:54,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:54,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820566943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:54,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:54,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:59:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456771468] [2022-11-23 03:59:54,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:59:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:59:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:59:54,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:54,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 1704 flow. Second operand has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:54,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:54,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:54,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:54,992 INFO L130 PetriNetUnfolder]: 385/742 cut-off events. [2022-11-23 03:59:54,993 INFO L131 PetriNetUnfolder]: For 8227/8227 co-relation queries the response was YES. [2022-11-23 03:59:54,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5069 conditions, 742 events. 385/742 cut-off events. For 8227/8227 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3633 event pairs, 81 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 5020. Up to 329 conditions per place. [2022-11-23 03:59:55,002 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 110 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2022-11-23 03:59:55,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 171 transitions, 2385 flow [2022-11-23 03:59:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:59:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:59:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2593 transitions. [2022-11-23 03:59:55,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43550554249244205 [2022-11-23 03:59:55,008 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2593 transitions. [2022-11-23 03:59:55,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2593 transitions. [2022-11-23 03:59:55,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:55,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2593 transitions. [2022-11-23 03:59:55,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 199.46153846153845) internal successors, (2593), 13 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:55,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:55,020 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:55,020 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 1704 flow. Second operand 13 states and 2593 transitions. [2022-11-23 03:59:55,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 171 transitions, 2385 flow [2022-11-23 03:59:55,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 171 transitions, 2168 flow, removed 64 selfloop flow, removed 10 redundant places. [2022-11-23 03:59:55,064 INFO L231 Difference]: Finished difference. Result has 140 places, 132 transitions, 1789 flow [2022-11-23 03:59:55,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1789, PETRI_PLACES=140, PETRI_TRANSITIONS=132} [2022-11-23 03:59:55,065 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2022-11-23 03:59:55,065 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 132 transitions, 1789 flow [2022-11-23 03:59:55,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:55,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:55,066 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:55,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 03:59:55,277 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1196788350, now seen corresponding path program 13 times [2022-11-23 03:59:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:55,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194136510] [2022-11-23 03:59:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:55,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194136510] [2022-11-23 03:59:55,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194136510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885369607] [2022-11-23 03:59:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:59:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:55,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:55,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 03:59:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:55,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:55,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885369607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:55,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:55,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:59:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225334825] [2022-11-23 03:59:55,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:59:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:59:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:59:55,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:55,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 132 transitions, 1789 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:55,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:55,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:56,205 INFO L130 PetriNetUnfolder]: 388/747 cut-off events. [2022-11-23 03:59:56,206 INFO L131 PetriNetUnfolder]: For 9089/9089 co-relation queries the response was YES. [2022-11-23 03:59:56,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5050 conditions, 747 events. 388/747 cut-off events. For 9089/9089 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3674 event pairs, 13 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 4994. Up to 192 conditions per place. [2022-11-23 03:59:56,219 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 124 selfloop transitions, 86 changer transitions 2/212 dead transitions. [2022-11-23 03:59:56,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 212 transitions, 2975 flow [2022-11-23 03:59:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 03:59:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 03:59:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3761 transitions. [2022-11-23 03:59:56,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43219949436911054 [2022-11-23 03:59:56,227 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3761 transitions. [2022-11-23 03:59:56,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3761 transitions. [2022-11-23 03:59:56,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:56,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3761 transitions. [2022-11-23 03:59:56,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 197.94736842105263) internal successors, (3761), 19 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:56,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 458.0) internal successors, (9160), 20 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:56,245 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 458.0) internal successors, (9160), 20 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:56,245 INFO L175 Difference]: Start difference. First operand has 140 places, 132 transitions, 1789 flow. Second operand 19 states and 3761 transitions. [2022-11-23 03:59:56,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 212 transitions, 2975 flow [2022-11-23 03:59:56,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 212 transitions, 2857 flow, removed 32 selfloop flow, removed 6 redundant places. [2022-11-23 03:59:56,288 INFO L231 Difference]: Finished difference. Result has 154 places, 158 transitions, 2254 flow [2022-11-23 03:59:56,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2254, PETRI_PLACES=154, PETRI_TRANSITIONS=158} [2022-11-23 03:59:56,289 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 134 predicate places. [2022-11-23 03:59:56,289 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 158 transitions, 2254 flow [2022-11-23 03:59:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:56,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:56,290 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:56,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:56,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 03:59:56,501 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash 861599920, now seen corresponding path program 14 times [2022-11-23 03:59:56,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:56,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945699595] [2022-11-23 03:59:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:56,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945699595] [2022-11-23 03:59:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945699595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133883118] [2022-11-23 03:59:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:59:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:56,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:56,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 03:59:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:59:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:56,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:56,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133883118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:56,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:56,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 03:59:56,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294954117] [2022-11-23 03:59:56,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:59:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:56,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:59:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:59:56,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:56,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 158 transitions, 2254 flow. Second operand has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:56,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:56,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:56,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:57,530 INFO L130 PetriNetUnfolder]: 481/962 cut-off events. [2022-11-23 03:59:57,530 INFO L131 PetriNetUnfolder]: For 14421/14421 co-relation queries the response was YES. [2022-11-23 03:59:57,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 962 events. 481/962 cut-off events. For 14421/14421 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5201 event pairs, 25 based on Foata normal form. 16/974 useless extension candidates. Maximal degree in co-relation 6784. Up to 269 conditions per place. [2022-11-23 03:59:57,552 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 129 selfloop transitions, 117 changer transitions 5/251 dead transitions. [2022-11-23 03:59:57,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 251 transitions, 3827 flow [2022-11-23 03:59:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:59:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:59:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4160 transitions. [2022-11-23 03:59:57,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4325223539197338 [2022-11-23 03:59:57,560 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4160 transitions. [2022-11-23 03:59:57,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4160 transitions. [2022-11-23 03:59:57,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:57,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4160 transitions. [2022-11-23 03:59:57,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.0952380952381) internal successors, (4160), 21 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:57,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:57,577 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:57,578 INFO L175 Difference]: Start difference. First operand has 154 places, 158 transitions, 2254 flow. Second operand 21 states and 4160 transitions. [2022-11-23 03:59:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 251 transitions, 3827 flow [2022-11-23 03:59:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 3534 flow, removed 109 selfloop flow, removed 8 redundant places. [2022-11-23 03:59:57,642 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 3011 flow [2022-11-23 03:59:57,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3011, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2022-11-23 03:59:57,643 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2022-11-23 03:59:57,643 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 3011 flow [2022-11-23 03:59:57,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:57,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:57,644 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:57,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:57,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:57,855 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1290148998, now seen corresponding path program 15 times [2022-11-23 03:59:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:57,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4256962] [2022-11-23 03:59:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:57,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:57,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4256962] [2022-11-23 03:59:57,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4256962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:57,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596037146] [2022-11-23 03:59:57,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:59:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:57,946 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:57,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 03:59:58,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:59:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:58,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:58,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596037146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:58,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:58,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 03:59:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979021587] [2022-11-23 03:59:58,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:59:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:59:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:59:58,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:58,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 3011 flow. Second operand has 13 states, 13 states have (on average 195.15384615384616) internal successors, (2537), 13 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:58,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:58,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:59:58,933 INFO L130 PetriNetUnfolder]: 631/1258 cut-off events. [2022-11-23 03:59:58,933 INFO L131 PetriNetUnfolder]: For 23878/23878 co-relation queries the response was YES. [2022-11-23 03:59:58,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9404 conditions, 1258 events. 631/1258 cut-off events. For 23878/23878 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7320 event pairs, 51 based on Foata normal form. 24/1282 useless extension candidates. Maximal degree in co-relation 9344. Up to 424 conditions per place. [2022-11-23 03:59:58,946 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 161 selfloop transitions, 133 changer transitions 0/294 dead transitions. [2022-11-23 03:59:58,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 294 transitions, 4884 flow [2022-11-23 03:59:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:59:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 03:59:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2993 transitions. [2022-11-23 03:59:58,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4356622998544396 [2022-11-23 03:59:58,955 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2993 transitions. [2022-11-23 03:59:58,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2993 transitions. [2022-11-23 03:59:58,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:59:58,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2993 transitions. [2022-11-23 03:59:58,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.53333333333333) internal successors, (2993), 15 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:58,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:58,968 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:58,968 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 3011 flow. Second operand 15 states and 2993 transitions. [2022-11-23 03:59:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 294 transitions, 4884 flow [2022-11-23 03:59:59,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 294 transitions, 4503 flow, removed 151 selfloop flow, removed 8 redundant places. [2022-11-23 03:59:59,100 INFO L231 Difference]: Finished difference. Result has 181 places, 230 transitions, 3834 flow [2022-11-23 03:59:59,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3834, PETRI_PLACES=181, PETRI_TRANSITIONS=230} [2022-11-23 03:59:59,101 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 161 predicate places. [2022-11-23 03:59:59,101 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 230 transitions, 3834 flow [2022-11-23 03:59:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.15384615384616) internal successors, (2537), 13 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:59,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:59:59,102 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:59:59,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:59:59,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 03:59:59,308 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:59:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:59:59,308 INFO L85 PathProgramCache]: Analyzing trace with hash 991679923, now seen corresponding path program 16 times [2022-11-23 03:59:59,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:59:59,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487892335] [2022-11-23 03:59:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:59:59,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:59:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:59:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:59,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:59:59,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487892335] [2022-11-23 03:59:59,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487892335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:59:59,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470141357] [2022-11-23 03:59:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:59:59,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:59:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:59:59,399 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:59:59,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 03:59:59,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:59:59,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:59:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:59:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:59:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:59,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:59:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:59:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470141357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:59:59,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:59:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 03:59:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993451396] [2022-11-23 03:59:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:59:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:59:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:59:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:59:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:59:59,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 03:59:59,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 230 transitions, 3834 flow. Second operand has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:59:59,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:59:59,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 03:59:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:00,500 INFO L130 PetriNetUnfolder]: 662/1343 cut-off events. [2022-11-23 04:00:00,501 INFO L131 PetriNetUnfolder]: For 28047/28047 co-relation queries the response was YES. [2022-11-23 04:00:00,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10512 conditions, 1343 events. 662/1343 cut-off events. For 28047/28047 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8189 event pairs, 27 based on Foata normal form. 24/1367 useless extension candidates. Maximal degree in co-relation 10448. Up to 595 conditions per place. [2022-11-23 04:00:00,518 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 205 selfloop transitions, 105 changer transitions 7/317 dead transitions. [2022-11-23 04:00:00,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 317 transitions, 5417 flow [2022-11-23 04:00:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 04:00:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-23 04:00:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4561 transitions. [2022-11-23 04:00:00,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43297892538446936 [2022-11-23 04:00:00,527 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4561 transitions. [2022-11-23 04:00:00,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4561 transitions. [2022-11-23 04:00:00,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:00,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4561 transitions. [2022-11-23 04:00:00,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 198.30434782608697) internal successors, (4561), 23 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:00,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 458.0) internal successors, (10992), 24 states have internal predecessors, (10992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:00,546 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 458.0) internal successors, (10992), 24 states have internal predecessors, (10992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:00,546 INFO L175 Difference]: Start difference. First operand has 181 places, 230 transitions, 3834 flow. Second operand 23 states and 4561 transitions. [2022-11-23 04:00:00,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 317 transitions, 5417 flow [2022-11-23 04:00:00,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 317 transitions, 5259 flow, removed 64 selfloop flow, removed 4 redundant places. [2022-11-23 04:00:00,696 INFO L231 Difference]: Finished difference. Result has 207 places, 247 transitions, 4470 flow [2022-11-23 04:00:00,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4470, PETRI_PLACES=207, PETRI_TRANSITIONS=247} [2022-11-23 04:00:00,697 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2022-11-23 04:00:00,698 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 247 transitions, 4470 flow [2022-11-23 04:00:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:00,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:00,698 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:00,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:00,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 04:00:00,905 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 693496362, now seen corresponding path program 17 times [2022-11-23 04:00:00,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821807174] [2022-11-23 04:00:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:00,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821807174] [2022-11-23 04:00:00,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821807174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327748408] [2022-11-23 04:00:00,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:00:00,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:00,996 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 04:00:01,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:00:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:01,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327748408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:01,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:01,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 04:00:01,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961461262] [2022-11-23 04:00:01,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:01,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:01,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 247 transitions, 4470 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:01,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:01,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:01,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:02,028 INFO L130 PetriNetUnfolder]: 752/1523 cut-off events. [2022-11-23 04:00:02,028 INFO L131 PetriNetUnfolder]: For 43133/43133 co-relation queries the response was YES. [2022-11-23 04:00:02,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 1523 events. 752/1523 cut-off events. For 43133/43133 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9510 event pairs, 118 based on Foata normal form. 16/1539 useless extension candidates. Maximal degree in co-relation 13111. Up to 484 conditions per place. [2022-11-23 04:00:02,045 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 220 selfloop transitions, 121 changer transitions 1/342 dead transitions. [2022-11-23 04:00:02,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 342 transitions, 6979 flow [2022-11-23 04:00:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 04:00:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 04:00:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3577 transitions. [2022-11-23 04:00:02,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338913148956817 [2022-11-23 04:00:02,052 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3577 transitions. [2022-11-23 04:00:02,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3577 transitions. [2022-11-23 04:00:02,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:02,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3577 transitions. [2022-11-23 04:00:02,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.72222222222223) internal successors, (3577), 18 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:02,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:02,067 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:02,068 INFO L175 Difference]: Start difference. First operand has 207 places, 247 transitions, 4470 flow. Second operand 18 states and 3577 transitions. [2022-11-23 04:00:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 342 transitions, 6979 flow [2022-11-23 04:00:02,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 342 transitions, 6013 flow, removed 398 selfloop flow, removed 11 redundant places. [2022-11-23 04:00:02,297 INFO L231 Difference]: Finished difference. Result has 217 places, 286 transitions, 5326 flow [2022-11-23 04:00:02,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5326, PETRI_PLACES=217, PETRI_TRANSITIONS=286} [2022-11-23 04:00:02,298 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2022-11-23 04:00:02,298 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 286 transitions, 5326 flow [2022-11-23 04:00:02,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:02,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:02,299 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:02,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 04:00:02,505 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1351517108, now seen corresponding path program 18 times [2022-11-23 04:00:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:02,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588708309] [2022-11-23 04:00:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:02,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588708309] [2022-11-23 04:00:02,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588708309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:02,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098193221] [2022-11-23 04:00:02,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:00:02,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:02,583 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:02,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 04:00:02,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 04:00:02,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:02,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098193221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:02,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:02,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-23 04:00:02,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404000944] [2022-11-23 04:00:02,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 04:00:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 04:00:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-23 04:00:02,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:02,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 286 transitions, 5326 flow. Second operand has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:02,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:02,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:02,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:03,539 INFO L130 PetriNetUnfolder]: 769/1564 cut-off events. [2022-11-23 04:00:03,539 INFO L131 PetriNetUnfolder]: For 44070/44070 co-relation queries the response was YES. [2022-11-23 04:00:03,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13022 conditions, 1564 events. 769/1564 cut-off events. For 44070/44070 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9881 event pairs, 125 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 12945. Up to 730 conditions per place. [2022-11-23 04:00:03,562 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 198 selfloop transitions, 121 changer transitions 5/324 dead transitions. [2022-11-23 04:00:03,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 324 transitions, 6518 flow [2022-11-23 04:00:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:00:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:00:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2177 transitions. [2022-11-23 04:00:03,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43211591901548235 [2022-11-23 04:00:03,567 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2177 transitions. [2022-11-23 04:00:03,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2177 transitions. [2022-11-23 04:00:03,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:03,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2177 transitions. [2022-11-23 04:00:03,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.9090909090909) internal successors, (2177), 11 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:03,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:03,577 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:03,577 INFO L175 Difference]: Start difference. First operand has 217 places, 286 transitions, 5326 flow. Second operand 11 states and 2177 transitions. [2022-11-23 04:00:03,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 324 transitions, 6518 flow [2022-11-23 04:00:03,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 324 transitions, 5774 flow, removed 353 selfloop flow, removed 5 redundant places. [2022-11-23 04:00:03,816 INFO L231 Difference]: Finished difference. Result has 226 places, 291 transitions, 5139 flow [2022-11-23 04:00:03,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5139, PETRI_PLACES=226, PETRI_TRANSITIONS=291} [2022-11-23 04:00:03,818 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2022-11-23 04:00:03,818 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 291 transitions, 5139 flow [2022-11-23 04:00:03,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:03,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:03,819 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:03,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 04:00:04,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 841517973, now seen corresponding path program 19 times [2022-11-23 04:00:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:04,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225407987] [2022-11-23 04:00:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225407987] [2022-11-23 04:00:04,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225407987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507708437] [2022-11-23 04:00:04,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:00:04,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:04,115 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:04,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 04:00:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:04,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:04,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507708437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:04,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:04,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-23 04:00:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044626657] [2022-11-23 04:00:04,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 04:00:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 04:00:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 04:00:04,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:04,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 291 transitions, 5139 flow. Second operand has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:04,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:04,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:04,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:04,985 INFO L130 PetriNetUnfolder]: 785/1588 cut-off events. [2022-11-23 04:00:04,985 INFO L131 PetriNetUnfolder]: For 34820/34820 co-relation queries the response was YES. [2022-11-23 04:00:04,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12589 conditions, 1588 events. 785/1588 cut-off events. For 34820/34820 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9975 event pairs, 42 based on Foata normal form. 10/1598 useless extension candidates. Maximal degree in co-relation 12507. Up to 1099 conditions per place. [2022-11-23 04:00:05,005 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 243 selfloop transitions, 83 changer transitions 0/326 dead transitions. [2022-11-23 04:00:05,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 326 transitions, 6236 flow [2022-11-23 04:00:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 04:00:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 04:00:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1398 transitions. [2022-11-23 04:00:05,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4360573923892701 [2022-11-23 04:00:05,009 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1398 transitions. [2022-11-23 04:00:05,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1398 transitions. [2022-11-23 04:00:05,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:05,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1398 transitions. [2022-11-23 04:00:05,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.71428571428572) internal successors, (1398), 7 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:05,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:05,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:05,016 INFO L175 Difference]: Start difference. First operand has 226 places, 291 transitions, 5139 flow. Second operand 7 states and 1398 transitions. [2022-11-23 04:00:05,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 326 transitions, 6236 flow [2022-11-23 04:00:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 326 transitions, 6068 flow, removed 64 selfloop flow, removed 5 redundant places. [2022-11-23 04:00:05,321 INFO L231 Difference]: Finished difference. Result has 228 places, 299 transitions, 5332 flow [2022-11-23 04:00:05,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5332, PETRI_PLACES=228, PETRI_TRANSITIONS=299} [2022-11-23 04:00:05,322 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2022-11-23 04:00:05,323 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 299 transitions, 5332 flow [2022-11-23 04:00:05,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:05,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:05,323 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:05,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:05,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:05,529 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 824496197, now seen corresponding path program 20 times [2022-11-23 04:00:05,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151461576] [2022-11-23 04:00:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:05,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:05,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151461576] [2022-11-23 04:00:05,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151461576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:05,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537548464] [2022-11-23 04:00:05,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:00:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:05,619 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 04:00:05,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:00:05,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:05,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:05,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:05,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537548464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:05,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:05,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 04:00:05,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896963592] [2022-11-23 04:00:05,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:05,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:05,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:05,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:05,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 299 transitions, 5332 flow. Second operand has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:05,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:05,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:05,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:06,654 INFO L130 PetriNetUnfolder]: 836/1677 cut-off events. [2022-11-23 04:00:06,654 INFO L131 PetriNetUnfolder]: For 36238/36238 co-relation queries the response was YES. [2022-11-23 04:00:06,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13254 conditions, 1677 events. 836/1677 cut-off events. For 36238/36238 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10608 event pairs, 68 based on Foata normal form. 24/1701 useless extension candidates. Maximal degree in co-relation 13171. Up to 1455 conditions per place. [2022-11-23 04:00:06,676 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 286 selfloop transitions, 62 changer transitions 0/348 dead transitions. [2022-11-23 04:00:06,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 348 transitions, 6665 flow [2022-11-23 04:00:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:00:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:00:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2182 transitions. [2022-11-23 04:00:06,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331083763398174 [2022-11-23 04:00:06,681 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2182 transitions. [2022-11-23 04:00:06,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2182 transitions. [2022-11-23 04:00:06,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:06,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2182 transitions. [2022-11-23 04:00:06,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 198.36363636363637) internal successors, (2182), 11 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:06,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:06,690 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:06,690 INFO L175 Difference]: Start difference. First operand has 228 places, 299 transitions, 5332 flow. Second operand 11 states and 2182 transitions. [2022-11-23 04:00:06,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 348 transitions, 6665 flow [2022-11-23 04:00:07,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 348 transitions, 6540 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-23 04:00:07,016 INFO L231 Difference]: Finished difference. Result has 240 places, 323 transitions, 5771 flow [2022-11-23 04:00:07,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5771, PETRI_PLACES=240, PETRI_TRANSITIONS=323} [2022-11-23 04:00:07,017 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2022-11-23 04:00:07,017 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 323 transitions, 5771 flow [2022-11-23 04:00:07,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:07,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:07,018 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:07,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-23 04:00:07,223 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1982941613, now seen corresponding path program 21 times [2022-11-23 04:00:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:07,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261225526] [2022-11-23 04:00:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:07,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261225526] [2022-11-23 04:00:07,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261225526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595498470] [2022-11-23 04:00:07,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:00:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:07,327 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:07,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 04:00:07,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:00:07,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:07,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595498470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:07,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:07,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 04:00:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215613407] [2022-11-23 04:00:07,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:00:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:00:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:00:07,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:07,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 323 transitions, 5771 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:07,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:07,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:07,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:08,527 INFO L130 PetriNetUnfolder]: 958/1905 cut-off events. [2022-11-23 04:00:08,527 INFO L131 PetriNetUnfolder]: For 41461/41461 co-relation queries the response was YES. [2022-11-23 04:00:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15415 conditions, 1905 events. 958/1905 cut-off events. For 41461/41461 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12351 event pairs, 70 based on Foata normal form. 36/1941 useless extension candidates. Maximal degree in co-relation 15327. Up to 1407 conditions per place. [2022-11-23 04:00:08,548 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 302 selfloop transitions, 125 changer transitions 0/427 dead transitions. [2022-11-23 04:00:08,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 427 transitions, 8033 flow [2022-11-23 04:00:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 04:00:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 04:00:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3375 transitions. [2022-11-23 04:00:08,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43347033136398666 [2022-11-23 04:00:08,553 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3375 transitions. [2022-11-23 04:00:08,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3375 transitions. [2022-11-23 04:00:08,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:08,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3375 transitions. [2022-11-23 04:00:08,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 198.52941176470588) internal successors, (3375), 17 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:08,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 458.0) internal successors, (8244), 18 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:08,567 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 458.0) internal successors, (8244), 18 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:08,567 INFO L175 Difference]: Start difference. First operand has 240 places, 323 transitions, 5771 flow. Second operand 17 states and 3375 transitions. [2022-11-23 04:00:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 427 transitions, 8033 flow [2022-11-23 04:00:08,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 427 transitions, 7818 flow, removed 79 selfloop flow, removed 6 redundant places. [2022-11-23 04:00:08,852 INFO L231 Difference]: Finished difference. Result has 256 places, 374 transitions, 6853 flow [2022-11-23 04:00:08,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6853, PETRI_PLACES=256, PETRI_TRANSITIONS=374} [2022-11-23 04:00:08,853 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 236 predicate places. [2022-11-23 04:00:08,853 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 374 transitions, 6853 flow [2022-11-23 04:00:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:08,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:08,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:08,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:09,054 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash 602087741, now seen corresponding path program 22 times [2022-11-23 04:00:09,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:09,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902322036] [2022-11-23 04:00:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:09,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:09,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902322036] [2022-11-23 04:00:09,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902322036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370721780] [2022-11-23 04:00:09,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:00:09,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:09,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:09,139 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:09,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 04:00:09,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:00:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:09,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:09,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370721780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:09,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:09,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 04:00:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367724887] [2022-11-23 04:00:09,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:09,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:09,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 374 transitions, 6853 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:09,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:09,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:09,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:10,469 INFO L130 PetriNetUnfolder]: 1048/2097 cut-off events. [2022-11-23 04:00:10,469 INFO L131 PetriNetUnfolder]: For 53472/53472 co-relation queries the response was YES. [2022-11-23 04:00:10,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17943 conditions, 2097 events. 1048/2097 cut-off events. For 53472/53472 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14006 event pairs, 62 based on Foata normal form. 12/2109 useless extension candidates. Maximal degree in co-relation 17847. Up to 1177 conditions per place. [2022-11-23 04:00:10,489 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 304 selfloop transitions, 165 changer transitions 0/469 dead transitions. [2022-11-23 04:00:10,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 469 transitions, 9374 flow [2022-11-23 04:00:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 04:00:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 04:00:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2993 transitions. [2022-11-23 04:00:10,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4356622998544396 [2022-11-23 04:00:10,493 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2993 transitions. [2022-11-23 04:00:10,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2993 transitions. [2022-11-23 04:00:10,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:10,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2993 transitions. [2022-11-23 04:00:10,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.53333333333333) internal successors, (2993), 15 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:10,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:10,506 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 458.0) internal successors, (7328), 16 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:10,506 INFO L175 Difference]: Start difference. First operand has 256 places, 374 transitions, 6853 flow. Second operand 15 states and 2993 transitions. [2022-11-23 04:00:10,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 469 transitions, 9374 flow [2022-11-23 04:00:10,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 469 transitions, 9125 flow, removed 89 selfloop flow, removed 7 redundant places. [2022-11-23 04:00:10,916 INFO L231 Difference]: Finished difference. Result has 268 places, 398 transitions, 7843 flow [2022-11-23 04:00:10,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7843, PETRI_PLACES=268, PETRI_TRANSITIONS=398} [2022-11-23 04:00:10,917 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2022-11-23 04:00:10,917 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 398 transitions, 7843 flow [2022-11-23 04:00:10,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:10,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:10,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:10,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-23 04:00:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-23 04:00:11,118 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1119354470, now seen corresponding path program 23 times [2022-11-23 04:00:11,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:11,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716303706] [2022-11-23 04:00:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:11,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716303706] [2022-11-23 04:00:11,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716303706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:11,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341659451] [2022-11-23 04:00:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:00:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:11,201 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:11,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 04:00:11,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:00:11,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:11,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:11,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:11,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341659451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:11,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:11,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 04:00:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186843458] [2022-11-23 04:00:11,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:11,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:11,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 398 transitions, 7843 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:11,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:11,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:12,480 INFO L130 PetriNetUnfolder]: 1040/2089 cut-off events. [2022-11-23 04:00:12,480 INFO L131 PetriNetUnfolder]: For 58507/58507 co-relation queries the response was YES. [2022-11-23 04:00:12,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18509 conditions, 2089 events. 1040/2089 cut-off events. For 58507/58507 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14114 event pairs, 175 based on Foata normal form. 8/2097 useless extension candidates. Maximal degree in co-relation 18409. Up to 787 conditions per place. [2022-11-23 04:00:12,500 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 295 selfloop transitions, 152 changer transitions 4/451 dead transitions. [2022-11-23 04:00:12,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 451 transitions, 9272 flow [2022-11-23 04:00:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 04:00:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 04:00:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3562 transitions. [2022-11-23 04:00:12,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43207180980106746 [2022-11-23 04:00:12,505 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3562 transitions. [2022-11-23 04:00:12,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3562 transitions. [2022-11-23 04:00:12,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:12,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3562 transitions. [2022-11-23 04:00:12,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 197.88888888888889) internal successors, (3562), 18 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:12,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:12,519 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:12,519 INFO L175 Difference]: Start difference. First operand has 268 places, 398 transitions, 7843 flow. Second operand 18 states and 3562 transitions. [2022-11-23 04:00:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 451 transitions, 9272 flow [2022-11-23 04:00:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 451 transitions, 8914 flow, removed 138 selfloop flow, removed 9 redundant places. [2022-11-23 04:00:12,986 INFO L231 Difference]: Finished difference. Result has 278 places, 396 transitions, 7821 flow [2022-11-23 04:00:12,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7474, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7821, PETRI_PLACES=278, PETRI_TRANSITIONS=396} [2022-11-23 04:00:12,987 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 258 predicate places. [2022-11-23 04:00:12,987 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 396 transitions, 7821 flow [2022-11-23 04:00:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:12,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:12,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:12,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 04:00:13,193 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 631933067, now seen corresponding path program 24 times [2022-11-23 04:00:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:13,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705527889] [2022-11-23 04:00:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:13,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:13,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705527889] [2022-11-23 04:00:13,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705527889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:13,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532184549] [2022-11-23 04:00:13,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:00:13,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:13,307 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:13,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 04:00:13,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:00:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:13,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532184549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:13,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 04:00:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040114980] [2022-11-23 04:00:13,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:13,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:00:13,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:00:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:00:13,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:13,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 396 transitions, 7821 flow. Second operand has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:13,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:13,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:13,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:14,552 INFO L130 PetriNetUnfolder]: 1068/2143 cut-off events. [2022-11-23 04:00:14,552 INFO L131 PetriNetUnfolder]: For 59484/59484 co-relation queries the response was YES. [2022-11-23 04:00:14,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 2143 events. 1068/2143 cut-off events. For 59484/59484 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 14454 event pairs, 80 based on Foata normal form. 8/2151 useless extension candidates. Maximal degree in co-relation 19047. Up to 1508 conditions per place. [2022-11-23 04:00:14,573 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 311 selfloop transitions, 141 changer transitions 0/452 dead transitions. [2022-11-23 04:00:14,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 452 transitions, 9384 flow [2022-11-23 04:00:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 04:00:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 04:00:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2786 transitions. [2022-11-23 04:00:14,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4344978165938865 [2022-11-23 04:00:14,577 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2786 transitions. [2022-11-23 04:00:14,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2786 transitions. [2022-11-23 04:00:14,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:14,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2786 transitions. [2022-11-23 04:00:14,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.0) internal successors, (2786), 14 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:14,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:14,587 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:14,587 INFO L175 Difference]: Start difference. First operand has 278 places, 396 transitions, 7821 flow. Second operand 14 states and 2786 transitions. [2022-11-23 04:00:14,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 452 transitions, 9384 flow [2022-11-23 04:00:15,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 452 transitions, 8965 flow, removed 45 selfloop flow, removed 12 redundant places. [2022-11-23 04:00:15,109 INFO L231 Difference]: Finished difference. Result has 278 places, 405 transitions, 7983 flow [2022-11-23 04:00:15,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7983, PETRI_PLACES=278, PETRI_TRANSITIONS=405} [2022-11-23 04:00:15,110 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 258 predicate places. [2022-11-23 04:00:15,110 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 405 transitions, 7983 flow [2022-11-23 04:00:15,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:15,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:15,110 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:15,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-23 04:00:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 04:00:15,311 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 596920978, now seen corresponding path program 25 times [2022-11-23 04:00:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362243755] [2022-11-23 04:00:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:15,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:15,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362243755] [2022-11-23 04:00:15,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362243755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:15,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077146201] [2022-11-23 04:00:15,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:00:15,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:15,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:15,397 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:15,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 04:00:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077146201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:15,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 04:00:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139905422] [2022-11-23 04:00:15,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:15,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:15,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 405 transitions, 7983 flow. Second operand has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:15,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:15,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:17,027 INFO L130 PetriNetUnfolder]: 1207/2440 cut-off events. [2022-11-23 04:00:17,027 INFO L131 PetriNetUnfolder]: For 78842/78842 co-relation queries the response was YES. [2022-11-23 04:00:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22241 conditions, 2440 events. 1207/2440 cut-off events. For 78842/78842 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17039 event pairs, 377 based on Foata normal form. 46/2486 useless extension candidates. Maximal degree in co-relation 22141. Up to 1789 conditions per place. [2022-11-23 04:00:17,050 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 399 selfloop transitions, 99 changer transitions 0/498 dead transitions. [2022-11-23 04:00:17,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 498 transitions, 10759 flow [2022-11-23 04:00:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 04:00:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 04:00:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2396 transitions. [2022-11-23 04:00:17,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4359534206695779 [2022-11-23 04:00:17,055 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2396 transitions. [2022-11-23 04:00:17,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2396 transitions. [2022-11-23 04:00:17,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:17,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2396 transitions. [2022-11-23 04:00:17,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.66666666666666) internal successors, (2396), 12 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:17,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:17,065 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:17,065 INFO L175 Difference]: Start difference. First operand has 278 places, 405 transitions, 7983 flow. Second operand 12 states and 2396 transitions. [2022-11-23 04:00:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 498 transitions, 10759 flow [2022-11-23 04:00:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 498 transitions, 10576 flow, removed 24 selfloop flow, removed 10 redundant places. [2022-11-23 04:00:17,581 INFO L231 Difference]: Finished difference. Result has 281 places, 438 transitions, 9130 flow [2022-11-23 04:00:17,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9130, PETRI_PLACES=281, PETRI_TRANSITIONS=438} [2022-11-23 04:00:17,582 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 261 predicate places. [2022-11-23 04:00:17,582 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 438 transitions, 9130 flow [2022-11-23 04:00:17,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:17,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:17,583 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:17,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:17,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-23 04:00:17,789 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1032527608, now seen corresponding path program 26 times [2022-11-23 04:00:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60178882] [2022-11-23 04:00:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:17,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60178882] [2022-11-23 04:00:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60178882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321038746] [2022-11-23 04:00:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:00:17,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:17,871 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:17,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 04:00:17,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:00:17,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:18,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321038746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:18,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 04:00:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680201202] [2022-11-23 04:00:18,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:18,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:00:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:00:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:00:18,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:18,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 438 transitions, 9130 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:18,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:18,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:19,354 INFO L130 PetriNetUnfolder]: 1247/2526 cut-off events. [2022-11-23 04:00:19,354 INFO L131 PetriNetUnfolder]: For 88452/88452 co-relation queries the response was YES. [2022-11-23 04:00:19,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23775 conditions, 2526 events. 1247/2526 cut-off events. For 88452/88452 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17889 event pairs, 190 based on Foata normal form. 18/2544 useless extension candidates. Maximal degree in co-relation 23673. Up to 784 conditions per place. [2022-11-23 04:00:19,378 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 324 selfloop transitions, 186 changer transitions 1/511 dead transitions. [2022-11-23 04:00:19,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 511 transitions, 11304 flow [2022-11-23 04:00:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 04:00:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 04:00:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3570 transitions. [2022-11-23 04:00:19,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433042212518195 [2022-11-23 04:00:19,383 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3570 transitions. [2022-11-23 04:00:19,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3570 transitions. [2022-11-23 04:00:19,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:19,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3570 transitions. [2022-11-23 04:00:19,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.33333333333334) internal successors, (3570), 18 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:19,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:19,392 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 458.0) internal successors, (8702), 19 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:19,392 INFO L175 Difference]: Start difference. First operand has 281 places, 438 transitions, 9130 flow. Second operand 18 states and 3570 transitions. [2022-11-23 04:00:19,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 511 transitions, 11304 flow [2022-11-23 04:00:20,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 511 transitions, 10995 flow, removed 118 selfloop flow, removed 9 redundant places. [2022-11-23 04:00:20,089 INFO L231 Difference]: Finished difference. Result has 292 places, 448 transitions, 9798 flow [2022-11-23 04:00:20,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9798, PETRI_PLACES=292, PETRI_TRANSITIONS=448} [2022-11-23 04:00:20,090 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 272 predicate places. [2022-11-23 04:00:20,090 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 448 transitions, 9798 flow [2022-11-23 04:00:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:20,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:20,091 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:20,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:20,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 04:00:20,296 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash -319720213, now seen corresponding path program 27 times [2022-11-23 04:00:20,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:20,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408117354] [2022-11-23 04:00:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:20,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:20,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408117354] [2022-11-23 04:00:20,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408117354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012648015] [2022-11-23 04:00:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:00:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:20,378 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 04:00:20,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:00:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:20,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:20,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:20,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:20,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012648015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:20,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:20,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 04:00:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202025508] [2022-11-23 04:00:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:00:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:00:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:00:20,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:20,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 448 transitions, 9798 flow. Second operand has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:20,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:20,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:20,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:21,882 INFO L130 PetriNetUnfolder]: 1227/2472 cut-off events. [2022-11-23 04:00:21,882 INFO L131 PetriNetUnfolder]: For 93769/93769 co-relation queries the response was YES. [2022-11-23 04:00:21,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 2472 events. 1227/2472 cut-off events. For 93769/93769 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17238 event pairs, 38 based on Foata normal form. 12/2484 useless extension candidates. Maximal degree in co-relation 23925. Up to 1093 conditions per place. [2022-11-23 04:00:21,904 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 307 selfloop transitions, 188 changer transitions 4/499 dead transitions. [2022-11-23 04:00:21,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 499 transitions, 11495 flow [2022-11-23 04:00:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 04:00:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 04:00:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4145 transitions. [2022-11-23 04:00:21,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4309627781243502 [2022-11-23 04:00:21,909 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4145 transitions. [2022-11-23 04:00:21,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4145 transitions. [2022-11-23 04:00:21,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:21,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4145 transitions. [2022-11-23 04:00:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 197.38095238095238) internal successors, (4145), 21 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:21,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:21,922 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:21,923 INFO L175 Difference]: Start difference. First operand has 292 places, 448 transitions, 9798 flow. Second operand 21 states and 4145 transitions. [2022-11-23 04:00:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 499 transitions, 11495 flow [2022-11-23 04:00:22,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 499 transitions, 10952 flow, removed 225 selfloop flow, removed 8 redundant places. [2022-11-23 04:00:22,590 INFO L231 Difference]: Finished difference. Result has 306 places, 454 transitions, 9868 flow [2022-11-23 04:00:22,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9868, PETRI_PLACES=306, PETRI_TRANSITIONS=454} [2022-11-23 04:00:22,592 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2022-11-23 04:00:22,592 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 454 transitions, 9868 flow [2022-11-23 04:00:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:22,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:22,593 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:22,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:22,798 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1032394448, now seen corresponding path program 28 times [2022-11-23 04:00:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918062700] [2022-11-23 04:00:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:22,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918062700] [2022-11-23 04:00:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918062700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316682691] [2022-11-23 04:00:22,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:00:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:22,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 04:00:23,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:00:23,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:23,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:23,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:23,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316682691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:23,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:23,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 04:00:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865631683] [2022-11-23 04:00:23,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:00:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:00:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:00:23,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:23,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 454 transitions, 9868 flow. Second operand has 12 states, 12 states have (on average 195.25) internal successors, (2343), 12 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:23,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:23,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:24,267 INFO L130 PetriNetUnfolder]: 1238/2505 cut-off events. [2022-11-23 04:00:24,267 INFO L131 PetriNetUnfolder]: For 90870/90870 co-relation queries the response was YES. [2022-11-23 04:00:24,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24416 conditions, 2505 events. 1238/2505 cut-off events. For 90870/90870 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 17621 event pairs, 311 based on Foata normal form. 12/2517 useless extension candidates. Maximal degree in co-relation 24307. Up to 1535 conditions per place. [2022-11-23 04:00:24,291 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 358 selfloop transitions, 155 changer transitions 0/513 dead transitions. [2022-11-23 04:00:24,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 513 transitions, 11769 flow [2022-11-23 04:00:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 04:00:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 04:00:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2593 transitions. [2022-11-23 04:00:24,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43550554249244205 [2022-11-23 04:00:24,295 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2593 transitions. [2022-11-23 04:00:24,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2593 transitions. [2022-11-23 04:00:24,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:24,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2593 transitions. [2022-11-23 04:00:24,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 199.46153846153845) internal successors, (2593), 13 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:24,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:24,303 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 458.0) internal successors, (6412), 14 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:24,303 INFO L175 Difference]: Start difference. First operand has 306 places, 454 transitions, 9868 flow. Second operand 13 states and 2593 transitions. [2022-11-23 04:00:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 513 transitions, 11769 flow [2022-11-23 04:00:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 513 transitions, 11596 flow, removed 41 selfloop flow, removed 8 redundant places. [2022-11-23 04:00:24,943 INFO L231 Difference]: Finished difference. Result has 308 places, 458 transitions, 10287 flow [2022-11-23 04:00:24,943 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10287, PETRI_PLACES=308, PETRI_TRANSITIONS=458} [2022-11-23 04:00:24,944 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 288 predicate places. [2022-11-23 04:00:24,944 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 458 transitions, 10287 flow [2022-11-23 04:00:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.25) internal successors, (2343), 12 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:24,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:24,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:24,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:25,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 04:00:25,150 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1807249699, now seen corresponding path program 29 times [2022-11-23 04:00:25,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:25,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613252281] [2022-11-23 04:00:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:25,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613252281] [2022-11-23 04:00:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613252281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055606950] [2022-11-23 04:00:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:00:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:25,231 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:25,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 04:00:25,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:00:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:00:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:25,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:25,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055606950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:25,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:25,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 04:00:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531969705] [2022-11-23 04:00:25,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:25,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:00:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:00:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:00:25,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:00:25,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 458 transitions, 10287 flow. Second operand has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:25,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:25,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:00:25,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:26,707 INFO L130 PetriNetUnfolder]: 1220/2457 cut-off events. [2022-11-23 04:00:26,707 INFO L131 PetriNetUnfolder]: For 91880/91880 co-relation queries the response was YES. [2022-11-23 04:00:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24622 conditions, 2457 events. 1220/2457 cut-off events. For 91880/91880 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17106 event pairs, 38 based on Foata normal form. 12/2469 useless extension candidates. Maximal degree in co-relation 24511. Up to 1030 conditions per place. [2022-11-23 04:00:26,734 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 296 selfloop transitions, 204 changer transitions 4/504 dead transitions. [2022-11-23 04:00:26,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 504 transitions, 11930 flow [2022-11-23 04:00:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 04:00:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 04:00:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3753 transitions. [2022-11-23 04:00:26,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4312801654792002 [2022-11-23 04:00:26,739 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3753 transitions. [2022-11-23 04:00:26,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3753 transitions. [2022-11-23 04:00:26,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:26,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3753 transitions. [2022-11-23 04:00:26,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 197.52631578947367) internal successors, (3753), 19 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:26,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 458.0) internal successors, (9160), 20 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:26,747 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 458.0) internal successors, (9160), 20 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:26,747 INFO L175 Difference]: Start difference. First operand has 308 places, 458 transitions, 10287 flow. Second operand 19 states and 3753 transitions. [2022-11-23 04:00:26,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 504 transitions, 11930 flow [2022-11-23 04:00:27,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 504 transitions, 11648 flow, removed 50 selfloop flow, removed 9 redundant places. [2022-11-23 04:00:27,408 INFO L231 Difference]: Finished difference. Result has 317 places, 460 transitions, 10555 flow [2022-11-23 04:00:27,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=9914, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10555, PETRI_PLACES=317, PETRI_TRANSITIONS=460} [2022-11-23 04:00:27,409 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 297 predicate places. [2022-11-23 04:00:27,409 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 460 transitions, 10555 flow [2022-11-23 04:00:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:27,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:27,410 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:27,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:27,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 04:00:27,615 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1980390109, now seen corresponding path program 30 times [2022-11-23 04:00:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518257735] [2022-11-23 04:00:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:28,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518257735] [2022-11-23 04:00:28,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518257735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893594487] [2022-11-23 04:00:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:00:28,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:28,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:28,371 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:28,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 04:00:28,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 04:00:28,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:28,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:28,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893594487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:28,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:28,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 04:00:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86627977] [2022-11-23 04:00:28,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:28,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:00:28,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:00:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:00:29,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:29,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 460 transitions, 10555 flow. Second operand has 15 states, 15 states have (on average 187.0) internal successors, (2805), 15 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:29,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:29,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:29,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:30,841 INFO L130 PetriNetUnfolder]: 1308/2660 cut-off events. [2022-11-23 04:00:30,841 INFO L131 PetriNetUnfolder]: For 98342/98344 co-relation queries the response was YES. [2022-11-23 04:00:30,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27372 conditions, 2660 events. 1308/2660 cut-off events. For 98342/98344 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19073 event pairs, 97 based on Foata normal form. 7/2661 useless extension candidates. Maximal degree in co-relation 27261. Up to 2259 conditions per place. [2022-11-23 04:00:30,875 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 441 selfloop transitions, 80 changer transitions 17/548 dead transitions. [2022-11-23 04:00:30,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 548 transitions, 12835 flow [2022-11-23 04:00:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 04:00:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 04:00:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2295 transitions. [2022-11-23 04:00:30,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175764192139738 [2022-11-23 04:00:30,879 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2295 transitions. [2022-11-23 04:00:30,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2295 transitions. [2022-11-23 04:00:30,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:30,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2295 transitions. [2022-11-23 04:00:30,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.25) internal successors, (2295), 12 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:30,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:30,888 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:30,888 INFO L175 Difference]: Start difference. First operand has 317 places, 460 transitions, 10555 flow. Second operand 12 states and 2295 transitions. [2022-11-23 04:00:30,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 548 transitions, 12835 flow [2022-11-23 04:00:31,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 548 transitions, 12619 flow, removed 20 selfloop flow, removed 11 redundant places. [2022-11-23 04:00:31,642 INFO L231 Difference]: Finished difference. Result has 323 places, 497 transitions, 11564 flow [2022-11-23 04:00:31,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=10345, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11564, PETRI_PLACES=323, PETRI_TRANSITIONS=497} [2022-11-23 04:00:31,643 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 303 predicate places. [2022-11-23 04:00:31,643 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 497 transitions, 11564 flow [2022-11-23 04:00:31,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 187.0) internal successors, (2805), 15 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:31,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:31,644 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:31,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-23 04:00:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-23 04:00:31,844 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 771565967, now seen corresponding path program 31 times [2022-11-23 04:00:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403093032] [2022-11-23 04:00:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:32,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403093032] [2022-11-23 04:00:32,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403093032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17064471] [2022-11-23 04:00:32,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:00:32,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:32,439 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:32,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 04:00:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:32,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:32,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17064471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:32,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:32,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-23 04:00:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026351849] [2022-11-23 04:00:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:32,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 04:00:32,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 04:00:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-23 04:00:33,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:33,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 497 transitions, 11564 flow. Second operand has 16 states, 16 states have (on average 187.0625) internal successors, (2993), 16 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:33,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:33,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:34,920 INFO L130 PetriNetUnfolder]: 1392/2824 cut-off events. [2022-11-23 04:00:34,920 INFO L131 PetriNetUnfolder]: For 111441/111445 co-relation queries the response was YES. [2022-11-23 04:00:34,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30012 conditions, 2824 events. 1392/2824 cut-off events. For 111441/111445 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 20447 event pairs, 96 based on Foata normal form. 5/2824 useless extension candidates. Maximal degree in co-relation 29893. Up to 2283 conditions per place. [2022-11-23 04:00:34,956 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 459 selfloop transitions, 102 changer transitions 15/586 dead transitions. [2022-11-23 04:00:34,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 586 transitions, 14115 flow [2022-11-23 04:00:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:00:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:00:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2110 transitions. [2022-11-23 04:00:34,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188169908693926 [2022-11-23 04:00:34,960 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2110 transitions. [2022-11-23 04:00:34,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2110 transitions. [2022-11-23 04:00:34,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:34,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2110 transitions. [2022-11-23 04:00:34,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.8181818181818) internal successors, (2110), 11 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:34,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:34,968 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:34,969 INFO L175 Difference]: Start difference. First operand has 323 places, 497 transitions, 11564 flow. Second operand 11 states and 2110 transitions. [2022-11-23 04:00:34,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 586 transitions, 14115 flow [2022-11-23 04:00:35,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 586 transitions, 13755 flow, removed 178 selfloop flow, removed 3 redundant places. [2022-11-23 04:00:36,006 INFO L231 Difference]: Finished difference. Result has 333 places, 527 transitions, 12377 flow [2022-11-23 04:00:36,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=11218, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12377, PETRI_PLACES=333, PETRI_TRANSITIONS=527} [2022-11-23 04:00:36,007 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 313 predicate places. [2022-11-23 04:00:36,007 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 527 transitions, 12377 flow [2022-11-23 04:00:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 187.0625) internal successors, (2993), 16 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:36,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:36,008 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:36,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-23 04:00:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:36,208 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1204432229, now seen corresponding path program 32 times [2022-11-23 04:00:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094613173] [2022-11-23 04:00:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094613173] [2022-11-23 04:00:36,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094613173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827497866] [2022-11-23 04:00:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:00:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:36,791 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:36,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 04:00:36,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:00:36,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:37,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:37,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827497866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:37,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:37,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 04:00:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117291819] [2022-11-23 04:00:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 04:00:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 04:00:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-23 04:00:37,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:37,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 527 transitions, 12377 flow. Second operand has 19 states, 19 states have (on average 186.73684210526315) internal successors, (3548), 19 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:37,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:37,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:37,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:39,255 INFO L130 PetriNetUnfolder]: 1385/2785 cut-off events. [2022-11-23 04:00:39,255 INFO L131 PetriNetUnfolder]: For 117685/117689 co-relation queries the response was YES. [2022-11-23 04:00:39,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29708 conditions, 2785 events. 1385/2785 cut-off events. For 117685/117689 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 19943 event pairs, 96 based on Foata normal form. 3/2783 useless extension candidates. Maximal degree in co-relation 29586. Up to 2283 conditions per place. [2022-11-23 04:00:39,293 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 459 selfloop transitions, 101 changer transitions 5/575 dead transitions. [2022-11-23 04:00:39,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 575 transitions, 13942 flow [2022-11-23 04:00:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:00:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:00:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1732 transitions. [2022-11-23 04:00:39,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42018437651625423 [2022-11-23 04:00:39,298 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1732 transitions. [2022-11-23 04:00:39,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1732 transitions. [2022-11-23 04:00:39,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:39,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1732 transitions. [2022-11-23 04:00:39,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.44444444444446) internal successors, (1732), 9 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:39,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:39,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:39,305 INFO L175 Difference]: Start difference. First operand has 333 places, 527 transitions, 12377 flow. Second operand 9 states and 1732 transitions. [2022-11-23 04:00:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 575 transitions, 13942 flow [2022-11-23 04:00:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 575 transitions, 13463 flow, removed 166 selfloop flow, removed 7 redundant places. [2022-11-23 04:00:40,622 INFO L231 Difference]: Finished difference. Result has 333 places, 528 transitions, 12217 flow [2022-11-23 04:00:40,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=11914, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12217, PETRI_PLACES=333, PETRI_TRANSITIONS=528} [2022-11-23 04:00:40,623 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 313 predicate places. [2022-11-23 04:00:40,623 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 528 transitions, 12217 flow [2022-11-23 04:00:40,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 186.73684210526315) internal successors, (3548), 19 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:40,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:40,624 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:40,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-23 04:00:40,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-23 04:00:40,824 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1004873275, now seen corresponding path program 33 times [2022-11-23 04:00:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649551338] [2022-11-23 04:00:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:41,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649551338] [2022-11-23 04:00:41,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649551338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:41,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775579691] [2022-11-23 04:00:41,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:00:41,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:41,389 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:41,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 04:00:41,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:00:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:41,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775579691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:41,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:41,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 04:00:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740873182] [2022-11-23 04:00:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:41,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:00:41,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:00:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:00:42,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:42,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 528 transitions, 12217 flow. Second operand has 17 states, 17 states have (on average 186.8235294117647) internal successors, (3176), 17 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:42,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:42,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:43,839 INFO L130 PetriNetUnfolder]: 1376/2758 cut-off events. [2022-11-23 04:00:43,839 INFO L131 PetriNetUnfolder]: For 113290/113294 co-relation queries the response was YES. [2022-11-23 04:00:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28997 conditions, 2758 events. 1376/2758 cut-off events. For 113290/113294 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 19645 event pairs, 95 based on Foata normal form. 3/2756 useless extension candidates. Maximal degree in co-relation 28876. Up to 2355 conditions per place. [2022-11-23 04:00:43,873 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 467 selfloop transitions, 95 changer transitions 5/577 dead transitions. [2022-11-23 04:00:43,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 577 transitions, 13734 flow [2022-11-23 04:00:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:00:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:00:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2105 transitions. [2022-11-23 04:00:43,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41782453354505755 [2022-11-23 04:00:43,878 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2105 transitions. [2022-11-23 04:00:43,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2105 transitions. [2022-11-23 04:00:43,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:43,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2105 transitions. [2022-11-23 04:00:43,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.36363636363637) internal successors, (2105), 11 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) [2022-11-23 04:00:43,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:43,886 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:43,886 INFO L175 Difference]: Start difference. First operand has 333 places, 528 transitions, 12217 flow. Second operand 11 states and 2105 transitions. [2022-11-23 04:00:43,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 577 transitions, 13734 flow [2022-11-23 04:00:45,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 577 transitions, 13486 flow, removed 43 selfloop flow, removed 6 redundant places. [2022-11-23 04:00:45,099 INFO L231 Difference]: Finished difference. Result has 338 places, 534 transitions, 12318 flow [2022-11-23 04:00:45,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=11975, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12318, PETRI_PLACES=338, PETRI_TRANSITIONS=534} [2022-11-23 04:00:45,100 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2022-11-23 04:00:45,100 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 534 transitions, 12318 flow [2022-11-23 04:00:45,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 186.8235294117647) internal successors, (3176), 17 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:45,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:45,101 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:45,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-23 04:00:45,301 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2049268405, now seen corresponding path program 34 times [2022-11-23 04:00:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:45,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363078123] [2022-11-23 04:00:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363078123] [2022-11-23 04:00:45,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363078123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132747972] [2022-11-23 04:00:45,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:00:45,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:45,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:45,839 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:45,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 04:00:45,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:00:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:45,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:46,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:46,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132747972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:46,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:46,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2022-11-23 04:00:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826487955] [2022-11-23 04:00:46,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:46,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 04:00:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 04:00:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-23 04:00:46,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:46,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 534 transitions, 12318 flow. Second operand has 16 states, 16 states have (on average 187.125) internal successors, (2994), 16 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:46,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:46,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:48,120 INFO L130 PetriNetUnfolder]: 1399/2816 cut-off events. [2022-11-23 04:00:48,120 INFO L131 PetriNetUnfolder]: For 116475/116479 co-relation queries the response was YES. [2022-11-23 04:00:48,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29695 conditions, 2816 events. 1399/2816 cut-off events. For 116475/116479 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 20258 event pairs, 118 based on Foata normal form. 4/2815 useless extension candidates. Maximal degree in co-relation 29573. Up to 2601 conditions per place. [2022-11-23 04:00:48,152 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 497 selfloop transitions, 67 changer transitions 6/580 dead transitions. [2022-11-23 04:00:48,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 580 transitions, 14058 flow [2022-11-23 04:00:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:00:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:00:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1531 transitions. [2022-11-23 04:00:48,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41784934497816595 [2022-11-23 04:00:48,156 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1531 transitions. [2022-11-23 04:00:48,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1531 transitions. [2022-11-23 04:00:48,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:48,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1531 transitions. [2022-11-23 04:00:48,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:48,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:48,161 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:48,162 INFO L175 Difference]: Start difference. First operand has 338 places, 534 transitions, 12318 flow. Second operand 8 states and 1531 transitions. [2022-11-23 04:00:48,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 580 transitions, 14058 flow [2022-11-23 04:00:49,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 580 transitions, 13864 flow, removed 26 selfloop flow, removed 7 redundant places. [2022-11-23 04:00:49,317 INFO L231 Difference]: Finished difference. Result has 341 places, 552 transitions, 12787 flow [2022-11-23 04:00:49,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=12128, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12787, PETRI_PLACES=341, PETRI_TRANSITIONS=552} [2022-11-23 04:00:49,318 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 321 predicate places. [2022-11-23 04:00:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 552 transitions, 12787 flow [2022-11-23 04:00:49,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 187.125) internal successors, (2994), 16 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:49,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:49,319 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:49,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 04:00:49,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:49,519 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1262635069, now seen corresponding path program 35 times [2022-11-23 04:00:49,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:49,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546682288] [2022-11-23 04:00:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546682288] [2022-11-23 04:00:49,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546682288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107474086] [2022-11-23 04:00:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:00:49,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:49,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:50,003 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:50,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 04:00:50,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:00:50,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:50,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:50,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:50,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107474086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:50,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:50,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-11-23 04:00:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163483980] [2022-11-23 04:00:50,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:00:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:00:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:00:51,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:51,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 552 transitions, 12787 flow. Second operand has 18 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:51,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:51,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:51,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:52,673 INFO L130 PetriNetUnfolder]: 1453/2926 cut-off events. [2022-11-23 04:00:52,673 INFO L131 PetriNetUnfolder]: For 123558/123562 co-relation queries the response was YES. [2022-11-23 04:00:52,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30879 conditions, 2926 events. 1453/2926 cut-off events. For 123558/123562 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 21155 event pairs, 124 based on Foata normal form. 4/2925 useless extension candidates. Maximal degree in co-relation 30754. Up to 2620 conditions per place. [2022-11-23 04:00:52,704 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 500 selfloop transitions, 88 changer transitions 6/604 dead transitions. [2022-11-23 04:00:52,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 604 transitions, 14642 flow [2022-11-23 04:00:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:00:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:00:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1536 transitions. [2022-11-23 04:00:52,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4192139737991266 [2022-11-23 04:00:52,707 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1536 transitions. [2022-11-23 04:00:52,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1536 transitions. [2022-11-23 04:00:52,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:52,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1536 transitions. [2022-11-23 04:00:52,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:52,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:52,713 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:52,713 INFO L175 Difference]: Start difference. First operand has 341 places, 552 transitions, 12787 flow. Second operand 8 states and 1536 transitions. [2022-11-23 04:00:52,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 604 transitions, 14642 flow [2022-11-23 04:00:53,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 604 transitions, 14345 flow, removed 105 selfloop flow, removed 4 redundant places. [2022-11-23 04:00:53,859 INFO L231 Difference]: Finished difference. Result has 346 places, 571 transitions, 13228 flow [2022-11-23 04:00:53,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=12496, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13228, PETRI_PLACES=346, PETRI_TRANSITIONS=571} [2022-11-23 04:00:53,860 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2022-11-23 04:00:53,860 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 571 transitions, 13228 flow [2022-11-23 04:00:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:53,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:53,860 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:53,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-23 04:00:54,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-23 04:00:54,061 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1376715379, now seen corresponding path program 36 times [2022-11-23 04:00:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386296154] [2022-11-23 04:00:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:54,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:54,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386296154] [2022-11-23 04:00:54,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386296154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:54,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565269257] [2022-11-23 04:00:54,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:00:54,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:54,565 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:54,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 04:00:54,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:00:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:00:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:54,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:55,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565269257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:55,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-11-23 04:00:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505690233] [2022-11-23 04:00:55,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:55,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:00:55,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:00:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:00:55,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:55,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 571 transitions, 13228 flow. Second operand has 18 states, 18 states have (on average 187.0) internal successors, (3366), 18 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:55,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:55,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:55,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:00:56,966 INFO L130 PetriNetUnfolder]: 1441/2890 cut-off events. [2022-11-23 04:00:56,966 INFO L131 PetriNetUnfolder]: For 124315/124319 co-relation queries the response was YES. [2022-11-23 04:00:56,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30631 conditions, 2890 events. 1441/2890 cut-off events. For 124315/124319 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 20768 event pairs, 124 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 30504. Up to 2620 conditions per place. [2022-11-23 04:00:57,000 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 498 selfloop transitions, 86 changer transitions 7/601 dead transitions. [2022-11-23 04:00:57,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 601 transitions, 14626 flow [2022-11-23 04:00:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:00:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:00:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1534 transitions. [2022-11-23 04:00:57,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41866812227074235 [2022-11-23 04:00:57,002 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1534 transitions. [2022-11-23 04:00:57,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1534 transitions. [2022-11-23 04:00:57,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:00:57,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1534 transitions. [2022-11-23 04:00:57,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.75) internal successors, (1534), 8 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:57,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:57,005 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:57,005 INFO L175 Difference]: Start difference. First operand has 346 places, 571 transitions, 13228 flow. Second operand 8 states and 1534 transitions. [2022-11-23 04:00:57,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 601 transitions, 14626 flow [2022-11-23 04:00:58,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 601 transitions, 14358 flow, removed 69 selfloop flow, removed 5 redundant places. [2022-11-23 04:00:58,309 INFO L231 Difference]: Finished difference. Result has 350 places, 572 transitions, 13249 flow [2022-11-23 04:00:58,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=12992, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13249, PETRI_PLACES=350, PETRI_TRANSITIONS=572} [2022-11-23 04:00:58,310 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 330 predicate places. [2022-11-23 04:00:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 572 transitions, 13249 flow [2022-11-23 04:00:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.0) internal successors, (3366), 18 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:58,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:00:58,311 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:00:58,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-23 04:00:58,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:58,511 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:00:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:00:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1386774669, now seen corresponding path program 37 times [2022-11-23 04:00:58,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:00:58,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78832460] [2022-11-23 04:00:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:00:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:00:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:59,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:00:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78832460] [2022-11-23 04:00:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78832460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:00:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243023022] [2022-11-23 04:00:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:00:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:00:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:00:59,036 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:00:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-23 04:00:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:00:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:00:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:00:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:00:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:00:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243023022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:00:59,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:00:59,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 04:00:59,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686347847] [2022-11-23 04:00:59,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:00:59,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:00:59,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:00:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:00:59,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:00:59,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:00:59,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 572 transitions, 13249 flow. Second operand has 17 states, 17 states have (on average 186.94117647058823) internal successors, (3178), 17 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:00:59,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:00:59,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:00:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:01,656 INFO L130 PetriNetUnfolder]: 1600/3238 cut-off events. [2022-11-23 04:01:01,656 INFO L131 PetriNetUnfolder]: For 137424/137428 co-relation queries the response was YES. [2022-11-23 04:01:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34089 conditions, 3238 events. 1600/3238 cut-off events. For 137424/137428 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 24080 event pairs, 133 based on Foata normal form. 11/3244 useless extension candidates. Maximal degree in co-relation 33960. Up to 2759 conditions per place. [2022-11-23 04:01:01,698 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 565 selfloop transitions, 124 changer transitions 18/717 dead transitions. [2022-11-23 04:01:01,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 717 transitions, 17089 flow [2022-11-23 04:01:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 04:01:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 04:01:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2300 transitions. [2022-11-23 04:01:01,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41848617176128095 [2022-11-23 04:01:01,701 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2300 transitions. [2022-11-23 04:01:01,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2300 transitions. [2022-11-23 04:01:01,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:01,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2300 transitions. [2022-11-23 04:01:01,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:01,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:01,707 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 458.0) internal successors, (5954), 13 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:01,707 INFO L175 Difference]: Start difference. First operand has 350 places, 572 transitions, 13249 flow. Second operand 12 states and 2300 transitions. [2022-11-23 04:01:01,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 717 transitions, 17089 flow [2022-11-23 04:01:03,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 717 transitions, 16927 flow, removed 16 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:03,405 INFO L231 Difference]: Finished difference. Result has 365 places, 648 transitions, 15306 flow [2022-11-23 04:01:03,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=13099, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15306, PETRI_PLACES=365, PETRI_TRANSITIONS=648} [2022-11-23 04:01:03,406 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2022-11-23 04:01:03,406 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 648 transitions, 15306 flow [2022-11-23 04:01:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 186.94117647058823) internal successors, (3178), 17 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:03,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:03,407 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:03,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-23 04:01:03,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-23 04:01:03,610 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1925128805, now seen corresponding path program 38 times [2022-11-23 04:01:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:03,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144714145] [2022-11-23 04:01:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144714145] [2022-11-23 04:01:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144714145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410192128] [2022-11-23 04:01:04,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:01:04,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:04,107 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:04,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 04:01:04,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:01:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:04,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:04,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410192128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:04,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:04,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-23 04:01:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435718876] [2022-11-23 04:01:04,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:04,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:01:04,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:01:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:01:05,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:05,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 648 transitions, 15306 flow. Second operand has 18 states, 18 states have (on average 186.77777777777777) internal successors, (3362), 18 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:05,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:05,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:06,945 INFO L130 PetriNetUnfolder]: 1633/3284 cut-off events. [2022-11-23 04:01:06,945 INFO L131 PetriNetUnfolder]: For 151405/151409 co-relation queries the response was YES. [2022-11-23 04:01:06,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35903 conditions, 3284 events. 1633/3284 cut-off events. For 151405/151409 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 24292 event pairs, 134 based on Foata normal form. 6/3285 useless extension candidates. Maximal degree in co-relation 35765. Up to 2767 conditions per place. [2022-11-23 04:01:06,988 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 571 selfloop transitions, 123 changer transitions 15/719 dead transitions. [2022-11-23 04:01:06,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 719 transitions, 17924 flow [2022-11-23 04:01:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:01:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:01:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2107 transitions. [2022-11-23 04:01:06,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182215164747916 [2022-11-23 04:01:06,994 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2107 transitions. [2022-11-23 04:01:06,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2107 transitions. [2022-11-23 04:01:06,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:06,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2107 transitions. [2022-11-23 04:01:06,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.54545454545453) internal successors, (2107), 11 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:07,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:07,001 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:07,001 INFO L175 Difference]: Start difference. First operand has 365 places, 648 transitions, 15306 flow. Second operand 11 states and 2107 transitions. [2022-11-23 04:01:07,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 719 transitions, 17924 flow [2022-11-23 04:01:08,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 719 transitions, 17526 flow, removed 199 selfloop flow, removed 2 redundant places. [2022-11-23 04:01:08,916 INFO L231 Difference]: Finished difference. Result has 376 places, 660 transitions, 15737 flow [2022-11-23 04:01:08,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=14926, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15737, PETRI_PLACES=376, PETRI_TRANSITIONS=660} [2022-11-23 04:01:08,917 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 356 predicate places. [2022-11-23 04:01:08,917 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 660 transitions, 15737 flow [2022-11-23 04:01:08,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 186.77777777777777) internal successors, (3362), 18 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:08,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:08,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:08,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-23 04:01:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-23 04:01:09,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash 926489749, now seen corresponding path program 39 times [2022-11-23 04:01:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:09,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046618862] [2022-11-23 04:01:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046618862] [2022-11-23 04:01:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046618862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933811466] [2022-11-23 04:01:09,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:01:09,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:09,607 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:09,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-23 04:01:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:01:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:09,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933811466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:10,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-11-23 04:01:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138601157] [2022-11-23 04:01:10,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:10,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:01:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:01:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:01:10,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:10,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 660 transitions, 15737 flow. Second operand has 15 states, 15 states have (on average 187.06666666666666) internal successors, (2806), 15 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:10,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:10,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:12,328 INFO L130 PetriNetUnfolder]: 1678/3376 cut-off events. [2022-11-23 04:01:12,328 INFO L131 PetriNetUnfolder]: For 159115/159119 co-relation queries the response was YES. [2022-11-23 04:01:12,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37062 conditions, 3376 events. 1678/3376 cut-off events. For 159115/159119 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25097 event pairs, 136 based on Foata normal form. 5/3376 useless extension candidates. Maximal degree in co-relation 36920. Up to 3075 conditions per place. [2022-11-23 04:01:12,373 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 616 selfloop transitions, 79 changer transitions 6/711 dead transitions. [2022-11-23 04:01:12,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 711 transitions, 17868 flow [2022-11-23 04:01:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:01:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:01:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1719 transitions. [2022-11-23 04:01:12,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4170305676855895 [2022-11-23 04:01:12,376 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1719 transitions. [2022-11-23 04:01:12,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1719 transitions. [2022-11-23 04:01:12,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:12,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1719 transitions. [2022-11-23 04:01:12,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.0) internal successors, (1719), 9 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:12,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:12,383 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:12,383 INFO L175 Difference]: Start difference. First operand has 376 places, 660 transitions, 15737 flow. Second operand 9 states and 1719 transitions. [2022-11-23 04:01:12,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 711 transitions, 17868 flow [2022-11-23 04:01:14,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 711 transitions, 17403 flow, removed 168 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:14,300 INFO L231 Difference]: Finished difference. Result has 381 places, 681 transitions, 16090 flow [2022-11-23 04:01:14,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=15280, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16090, PETRI_PLACES=381, PETRI_TRANSITIONS=681} [2022-11-23 04:01:14,302 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 361 predicate places. [2022-11-23 04:01:14,302 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 681 transitions, 16090 flow [2022-11-23 04:01:14,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 187.06666666666666) internal successors, (2806), 15 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:14,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:14,303 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:14,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:14,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-23 04:01:14,508 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash -869604349, now seen corresponding path program 40 times [2022-11-23 04:01:14,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238716121] [2022-11-23 04:01:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:14,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238716121] [2022-11-23 04:01:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238716121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824098061] [2022-11-23 04:01:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:01:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:14,999 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-23 04:01:15,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:01:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:15,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824098061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:15,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:15,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-11-23 04:01:15,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12317374] [2022-11-23 04:01:15,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:15,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:01:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:01:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:01:16,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:16,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 681 transitions, 16090 flow. Second operand has 18 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:16,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:16,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:16,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:17,823 INFO L130 PetriNetUnfolder]: 1734/3502 cut-off events. [2022-11-23 04:01:17,823 INFO L131 PetriNetUnfolder]: For 159804/159808 co-relation queries the response was YES. [2022-11-23 04:01:17,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37876 conditions, 3502 events. 1734/3502 cut-off events. For 159804/159808 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 26276 event pairs, 128 based on Foata normal form. 5/3502 useless extension candidates. Maximal degree in co-relation 37732. Up to 3100 conditions per place. [2022-11-23 04:01:17,870 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 621 selfloop transitions, 103 changer transitions 7/741 dead transitions. [2022-11-23 04:01:17,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 741 transitions, 18393 flow [2022-11-23 04:01:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:01:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:01:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1726 transitions. [2022-11-23 04:01:17,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41872877244056284 [2022-11-23 04:01:17,872 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1726 transitions. [2022-11-23 04:01:17,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1726 transitions. [2022-11-23 04:01:17,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:17,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1726 transitions. [2022-11-23 04:01:17,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.77777777777777) internal successors, (1726), 9 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:17,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:17,877 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:17,878 INFO L175 Difference]: Start difference. First operand has 381 places, 681 transitions, 16090 flow. Second operand 9 states and 1726 transitions. [2022-11-23 04:01:17,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 741 transitions, 18393 flow [2022-11-23 04:01:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 741 transitions, 18032 flow, removed 128 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:19,635 INFO L231 Difference]: Finished difference. Result has 386 places, 703 transitions, 16592 flow [2022-11-23 04:01:19,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=15735, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16592, PETRI_PLACES=386, PETRI_TRANSITIONS=703} [2022-11-23 04:01:19,635 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 366 predicate places. [2022-11-23 04:01:19,636 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 703 transitions, 16592 flow [2022-11-23 04:01:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:19,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:19,636 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:19,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-23 04:01:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:19,837 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1793728323, now seen corresponding path program 41 times [2022-11-23 04:01:19,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448085188] [2022-11-23 04:01:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:20,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:20,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448085188] [2022-11-23 04:01:20,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448085188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:20,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376652317] [2022-11-23 04:01:20,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:01:20,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:20,359 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:20,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 04:01:20,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:01:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:20,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376652317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:20,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 04:01:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746358047] [2022-11-23 04:01:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:01:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:01:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:01:21,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:21,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 703 transitions, 16592 flow. Second operand has 15 states, 15 states have (on average 187.06666666666666) internal successors, (2806), 15 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:21,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:21,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:21,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:23,144 INFO L130 PetriNetUnfolder]: 1719/3455 cut-off events. [2022-11-23 04:01:23,144 INFO L131 PetriNetUnfolder]: For 157686/157690 co-relation queries the response was YES. [2022-11-23 04:01:23,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37193 conditions, 3455 events. 1719/3455 cut-off events. For 157686/157690 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 25761 event pairs, 135 based on Foata normal form. 3/3453 useless extension candidates. Maximal degree in co-relation 37047. Up to 3160 conditions per place. [2022-11-23 04:01:23,187 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 635 selfloop transitions, 100 changer transitions 5/750 dead transitions. [2022-11-23 04:01:23,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 750 transitions, 18539 flow [2022-11-23 04:01:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:01:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:01:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2099 transitions. [2022-11-23 04:01:23,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4166335847558555 [2022-11-23 04:01:23,190 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2099 transitions. [2022-11-23 04:01:23,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2099 transitions. [2022-11-23 04:01:23,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:23,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2099 transitions. [2022-11-23 04:01:23,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.8181818181818) internal successors, (2099), 11 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:23,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:23,196 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 458.0) internal successors, (5496), 12 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:23,196 INFO L175 Difference]: Start difference. First operand has 386 places, 703 transitions, 16592 flow. Second operand 11 states and 2099 transitions. [2022-11-23 04:01:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 750 transitions, 18539 flow [2022-11-23 04:01:24,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 750 transitions, 18351 flow, removed 34 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:24,943 INFO L231 Difference]: Finished difference. Result has 393 places, 714 transitions, 16945 flow [2022-11-23 04:01:24,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16410, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16945, PETRI_PLACES=393, PETRI_TRANSITIONS=714} [2022-11-23 04:01:24,944 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2022-11-23 04:01:24,944 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 714 transitions, 16945 flow [2022-11-23 04:01:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 187.06666666666666) internal successors, (2806), 15 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:24,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:24,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:24,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:25,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:25,150 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 463570365, now seen corresponding path program 42 times [2022-11-23 04:01:25,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64736195] [2022-11-23 04:01:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:25,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64736195] [2022-11-23 04:01:25,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64736195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764969691] [2022-11-23 04:01:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:01:25,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:25,607 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:25,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-23 04:01:25,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:01:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764969691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:26,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:26,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 04:01:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932986748] [2022-11-23 04:01:26,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 04:01:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 04:01:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-23 04:01:26,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:26,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 714 transitions, 16945 flow. Second operand has 19 states, 19 states have (on average 186.8421052631579) internal successors, (3550), 19 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:26,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:26,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:26,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:28,294 INFO L130 PetriNetUnfolder]: 1716/3434 cut-off events. [2022-11-23 04:01:28,295 INFO L131 PetriNetUnfolder]: For 157094/157098 co-relation queries the response was YES. [2022-11-23 04:01:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37189 conditions, 3434 events. 1716/3434 cut-off events. For 157094/157098 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25417 event pairs, 137 based on Foata normal form. 3/3432 useless extension candidates. Maximal degree in co-relation 37041. Up to 2999 conditions per place. [2022-11-23 04:01:28,340 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 611 selfloop transitions, 123 changer transitions 5/749 dead transitions. [2022-11-23 04:01:28,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 749 transitions, 18737 flow [2022-11-23 04:01:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:01:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:01:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1727 transitions. [2022-11-23 04:01:28,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4189713731198447 [2022-11-23 04:01:28,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1727 transitions. [2022-11-23 04:01:28,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1727 transitions. [2022-11-23 04:01:28,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:28,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1727 transitions. [2022-11-23 04:01:28,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.88888888888889) internal successors, (1727), 9 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:28,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:28,346 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:28,346 INFO L175 Difference]: Start difference. First operand has 393 places, 714 transitions, 16945 flow. Second operand 9 states and 1727 transitions. [2022-11-23 04:01:28,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 749 transitions, 18737 flow [2022-11-23 04:01:30,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 749 transitions, 18347 flow, removed 101 selfloop flow, removed 8 redundant places. [2022-11-23 04:01:30,395 INFO L231 Difference]: Finished difference. Result has 395 places, 716 transitions, 16949 flow [2022-11-23 04:01:30,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16561, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16949, PETRI_PLACES=395, PETRI_TRANSITIONS=716} [2022-11-23 04:01:30,395 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2022-11-23 04:01:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 716 transitions, 16949 flow [2022-11-23 04:01:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 186.8421052631579) internal successors, (3550), 19 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:30,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:30,396 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:30,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-23 04:01:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-23 04:01:30,597 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1592038305, now seen corresponding path program 43 times [2022-11-23 04:01:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:30,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644341457] [2022-11-23 04:01:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:31,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644341457] [2022-11-23 04:01:31,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644341457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51605911] [2022-11-23 04:01:31,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:01:31,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:31,171 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:31,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-23 04:01:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 04:01:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:31,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:31,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51605911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:31,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:31,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-11-23 04:01:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862245576] [2022-11-23 04:01:31,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:31,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:01:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:31,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:01:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:01:32,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 458 [2022-11-23 04:01:32,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 716 transitions, 16949 flow. Second operand has 17 states, 17 states have (on average 187.05882352941177) internal successors, (3180), 17 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:32,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:32,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 458 [2022-11-23 04:01:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:33,760 INFO L130 PetriNetUnfolder]: 1713/3411 cut-off events. [2022-11-23 04:01:33,760 INFO L131 PetriNetUnfolder]: For 157632/157636 co-relation queries the response was YES. [2022-11-23 04:01:33,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36928 conditions, 3411 events. 1713/3411 cut-off events. For 157632/157636 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 25087 event pairs, 129 based on Foata normal form. 5/3411 useless extension candidates. Maximal degree in co-relation 36778. Up to 3059 conditions per place. [2022-11-23 04:01:33,813 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 629 selfloop transitions, 102 changer transitions 6/747 dead transitions. [2022-11-23 04:01:33,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 747 transitions, 18651 flow [2022-11-23 04:01:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:01:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:01:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1535 transitions. [2022-11-23 04:01:33,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4189410480349345 [2022-11-23 04:01:33,816 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1535 transitions. [2022-11-23 04:01:33,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1535 transitions. [2022-11-23 04:01:33,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:33,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1535 transitions. [2022-11-23 04:01:33,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.875) internal successors, (1535), 8 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:33,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:33,821 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 458.0) internal successors, (4122), 9 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:33,822 INFO L175 Difference]: Start difference. First operand has 395 places, 716 transitions, 16949 flow. Second operand 8 states and 1535 transitions. [2022-11-23 04:01:33,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 747 transitions, 18651 flow [2022-11-23 04:01:35,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 747 transitions, 18360 flow, removed 45 selfloop flow, removed 6 redundant places. [2022-11-23 04:01:35,709 INFO L231 Difference]: Finished difference. Result has 398 places, 718 transitions, 17008 flow [2022-11-23 04:01:35,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16662, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17008, PETRI_PLACES=398, PETRI_TRANSITIONS=718} [2022-11-23 04:01:35,709 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 378 predicate places. [2022-11-23 04:01:35,709 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 718 transitions, 17008 flow [2022-11-23 04:01:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.05882352941177) internal successors, (3180), 17 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:35,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:35,710 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:35,911 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 447395315, now seen corresponding path program 44 times [2022-11-23 04:01:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:35,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382473033] [2022-11-23 04:01:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:36,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382473033] [2022-11-23 04:01:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382473033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935175071] [2022-11-23 04:01:36,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:01:36,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:36,013 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:36,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-23 04:01:36,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:01:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:01:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:36,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935175071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:36,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:36,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-23 04:01:36,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683176902] [2022-11-23 04:01:36,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:36,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 04:01:36,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 04:01:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-23 04:01:36,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:01:36,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 718 transitions, 17008 flow. Second operand has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:36,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:36,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:01:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:38,911 INFO L130 PetriNetUnfolder]: 2287/4570 cut-off events. [2022-11-23 04:01:38,911 INFO L131 PetriNetUnfolder]: For 221429/221429 co-relation queries the response was YES. [2022-11-23 04:01:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49581 conditions, 4570 events. 2287/4570 cut-off events. For 221429/221429 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35375 event pairs, 218 based on Foata normal form. 36/4606 useless extension candidates. Maximal degree in co-relation 49429. Up to 2620 conditions per place. [2022-11-23 04:01:38,977 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 699 selfloop transitions, 284 changer transitions 0/983 dead transitions. [2022-11-23 04:01:38,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 983 transitions, 25164 flow [2022-11-23 04:01:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:01:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:01:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1803 transitions. [2022-11-23 04:01:38,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43740902474526927 [2022-11-23 04:01:38,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1803 transitions. [2022-11-23 04:01:38,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1803 transitions. [2022-11-23 04:01:38,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:38,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1803 transitions. [2022-11-23 04:01:38,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:38,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:38,987 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:38,987 INFO L175 Difference]: Start difference. First operand has 398 places, 718 transitions, 17008 flow. Second operand 9 states and 1803 transitions. [2022-11-23 04:01:38,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 983 transitions, 25164 flow [2022-11-23 04:01:42,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 983 transitions, 24810 flow, removed 79 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:42,203 INFO L231 Difference]: Finished difference. Result has 405 places, 839 transitions, 20963 flow [2022-11-23 04:01:42,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=16749, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20963, PETRI_PLACES=405, PETRI_TRANSITIONS=839} [2022-11-23 04:01:42,203 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2022-11-23 04:01:42,204 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 839 transitions, 20963 flow [2022-11-23 04:01:42,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:42,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:42,204 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:42,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:42,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:42,405 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:42,405 INFO L85 PathProgramCache]: Analyzing trace with hash -309017010, now seen corresponding path program 45 times [2022-11-23 04:01:42,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:42,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022538878] [2022-11-23 04:01:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:42,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022538878] [2022-11-23 04:01:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022538878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013137423] [2022-11-23 04:01:42,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:01:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:42,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:42,515 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:42,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-23 04:01:42,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:01:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:01:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:42,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013137423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:42,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:42,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-23 04:01:42,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021765551] [2022-11-23 04:01:42,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 04:01:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 04:01:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-23 04:01:42,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:01:42,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 839 transitions, 20963 flow. Second operand has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:42,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:42,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:01:42,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:45,745 INFO L130 PetriNetUnfolder]: 2292/4587 cut-off events. [2022-11-23 04:01:45,746 INFO L131 PetriNetUnfolder]: For 229868/229868 co-relation queries the response was YES. [2022-11-23 04:01:45,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50740 conditions, 4587 events. 2292/4587 cut-off events. For 229868/229868 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35470 event pairs, 360 based on Foata normal form. 4/4591 useless extension candidates. Maximal degree in co-relation 50584. Up to 1696 conditions per place. [2022-11-23 04:01:45,821 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 581 selfloop transitions, 393 changer transitions 15/989 dead transitions. [2022-11-23 04:01:45,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 989 transitions, 26044 flow [2022-11-23 04:01:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 04:01:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 04:01:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2777 transitions. [2022-11-23 04:01:45,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4330941983780412 [2022-11-23 04:01:45,825 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2777 transitions. [2022-11-23 04:01:45,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2777 transitions. [2022-11-23 04:01:45,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:45,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2777 transitions. [2022-11-23 04:01:45,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 198.35714285714286) internal successors, (2777), 14 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:45,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:45,835 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:45,835 INFO L175 Difference]: Start difference. First operand has 405 places, 839 transitions, 20963 flow. Second operand 14 states and 2777 transitions. [2022-11-23 04:01:45,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 989 transitions, 26044 flow [2022-11-23 04:01:49,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 989 transitions, 25701 flow, removed 97 selfloop flow, removed 3 redundant places. [2022-11-23 04:01:49,173 INFO L231 Difference]: Finished difference. Result has 420 places, 893 transitions, 23211 flow [2022-11-23 04:01:49,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=20620, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23211, PETRI_PLACES=420, PETRI_TRANSITIONS=893} [2022-11-23 04:01:49,174 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2022-11-23 04:01:49,174 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 893 transitions, 23211 flow [2022-11-23 04:01:49,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:49,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:49,175 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:49,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-23 04:01:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-23 04:01:49,375 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1346339939, now seen corresponding path program 46 times [2022-11-23 04:01:49,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:49,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945353613] [2022-11-23 04:01:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945353613] [2022-11-23 04:01:49,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945353613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519851336] [2022-11-23 04:01:49,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:01:49,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:49,479 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:49,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-23 04:01:49,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:01:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:01:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:49,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519851336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:49,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:49,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:01:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035499707] [2022-11-23 04:01:49,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:01:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:01:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:01:49,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:01:49,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 893 transitions, 23211 flow. Second operand has 15 states, 15 states have (on average 195.06666666666666) internal successors, (2926), 15 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:49,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:49,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:01:49,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:53,528 INFO L130 PetriNetUnfolder]: 2531/5084 cut-off events. [2022-11-23 04:01:53,528 INFO L131 PetriNetUnfolder]: For 301526/301526 co-relation queries the response was YES. [2022-11-23 04:01:53,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59260 conditions, 5084 events. 2531/5084 cut-off events. For 301526/301526 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40516 event pairs, 178 based on Foata normal form. 62/5146 useless extension candidates. Maximal degree in co-relation 59099. Up to 3429 conditions per place. [2022-11-23 04:01:53,625 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 749 selfloop transitions, 323 changer transitions 0/1072 dead transitions. [2022-11-23 04:01:53,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1072 transitions, 29475 flow [2022-11-23 04:01:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 04:01:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 04:01:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4391 transitions. [2022-11-23 04:01:53,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.435788011115522 [2022-11-23 04:01:53,630 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4391 transitions. [2022-11-23 04:01:53,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4391 transitions. [2022-11-23 04:01:53,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:53,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4391 transitions. [2022-11-23 04:01:53,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.5909090909091) internal successors, (4391), 22 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:53,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:53,638 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:53,638 INFO L175 Difference]: Start difference. First operand has 420 places, 893 transitions, 23211 flow. Second operand 22 states and 4391 transitions. [2022-11-23 04:01:53,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1072 transitions, 29475 flow [2022-11-23 04:01:57,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1072 transitions, 28573 flow, removed 221 selfloop flow, removed 9 redundant places. [2022-11-23 04:01:57,496 INFO L231 Difference]: Finished difference. Result has 438 places, 970 transitions, 25826 flow [2022-11-23 04:01:57,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=22316, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25826, PETRI_PLACES=438, PETRI_TRANSITIONS=970} [2022-11-23 04:01:57,497 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 418 predicate places. [2022-11-23 04:01:57,497 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 970 transitions, 25826 flow [2022-11-23 04:01:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 195.06666666666666) internal successors, (2926), 15 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:57,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:57,497 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:57,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-23 04:01:57,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-23 04:01:57,698 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:01:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash -40072718, now seen corresponding path program 47 times [2022-11-23 04:01:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:57,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846837134] [2022-11-23 04:01:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:57,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846837134] [2022-11-23 04:01:57,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846837134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:57,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122018831] [2022-11-23 04:01:57,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:01:57,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:57,794 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:57,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-23 04:01:57,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:01:57,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:57,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:01:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:58,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122018831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:58,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:58,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-23 04:01:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122823761] [2022-11-23 04:01:58,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:58,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 04:01:58,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 04:01:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-23 04:01:58,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:01:58,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 970 transitions, 25826 flow. Second operand has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:01:58,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:58,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:01:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:02,481 INFO L130 PetriNetUnfolder]: 2539/5142 cut-off events. [2022-11-23 04:02:02,481 INFO L131 PetriNetUnfolder]: For 315286/315286 co-relation queries the response was YES. [2022-11-23 04:02:02,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61116 conditions, 5142 events. 2539/5142 cut-off events. For 315286/315286 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41368 event pairs, 397 based on Foata normal form. 24/5166 useless extension candidates. Maximal degree in co-relation 60948. Up to 2041 conditions per place. [2022-11-23 04:02:02,585 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 631 selfloop transitions, 467 changer transitions 11/1109 dead transitions. [2022-11-23 04:02:02,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1109 transitions, 30409 flow [2022-11-23 04:02:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 04:02:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 04:02:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5149 transitions. [2022-11-23 04:02:02,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4323983876385623 [2022-11-23 04:02:02,592 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5149 transitions. [2022-11-23 04:02:02,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5149 transitions. [2022-11-23 04:02:02,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:02,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5149 transitions. [2022-11-23 04:02:02,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 198.03846153846155) internal successors, (5149), 26 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:02,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:02,612 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 458.0) internal successors, (12366), 27 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:02,612 INFO L175 Difference]: Start difference. First operand has 438 places, 970 transitions, 25826 flow. Second operand 26 states and 5149 transitions. [2022-11-23 04:02:02,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1109 transitions, 30409 flow [2022-11-23 04:02:06,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1109 transitions, 29249 flow, removed 444 selfloop flow, removed 11 redundant places. [2022-11-23 04:02:06,938 INFO L231 Difference]: Finished difference. Result has 457 places, 984 transitions, 26347 flow [2022-11-23 04:02:06,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=24661, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26347, PETRI_PLACES=457, PETRI_TRANSITIONS=984} [2022-11-23 04:02:06,939 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2022-11-23 04:02:06,939 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 984 transitions, 26347 flow [2022-11-23 04:02:06,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:06,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:06,940 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:06,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-23 04:02:07,146 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:02:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:07,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1216709874, now seen corresponding path program 48 times [2022-11-23 04:02:07,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:07,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168971319] [2022-11-23 04:02:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:07,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:07,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168971319] [2022-11-23 04:02:07,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168971319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:02:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238668784] [2022-11-23 04:02:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:02:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:07,275 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:07,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 04:02:07,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:02:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:02:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:07,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238668784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:07,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:02:07,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:02:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522459422] [2022-11-23 04:02:07,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:07,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:02:07,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 984 transitions, 26347 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:07,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:07,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:02:07,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:13,002 INFO L130 PetriNetUnfolder]: 2890/5847 cut-off events. [2022-11-23 04:02:13,002 INFO L131 PetriNetUnfolder]: For 401776/401776 co-relation queries the response was YES. [2022-11-23 04:02:13,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71662 conditions, 5847 events. 2890/5847 cut-off events. For 401776/401776 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 47964 event pairs, 336 based on Foata normal form. 64/5911 useless extension candidates. Maximal degree in co-relation 71490. Up to 1684 conditions per place. [2022-11-23 04:02:13,145 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 649 selfloop transitions, 602 changer transitions 6/1257 dead transitions. [2022-11-23 04:02:13,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1257 transitions, 34755 flow [2022-11-23 04:02:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 04:02:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 04:02:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6153 transitions. [2022-11-23 04:02:13,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4333708973094802 [2022-11-23 04:02:13,150 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6153 transitions. [2022-11-23 04:02:13,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6153 transitions. [2022-11-23 04:02:13,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:13,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6153 transitions. [2022-11-23 04:02:13,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 198.48387096774192) internal successors, (6153), 31 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:13,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 458.0) internal successors, (14656), 32 states have internal predecessors, (14656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:13,163 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 458.0) internal successors, (14656), 32 states have internal predecessors, (14656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:13,163 INFO L175 Difference]: Start difference. First operand has 457 places, 984 transitions, 26347 flow. Second operand 31 states and 6153 transitions. [2022-11-23 04:02:13,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1257 transitions, 34755 flow [2022-11-23 04:02:18,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1257 transitions, 33729 flow, removed 222 selfloop flow, removed 11 redundant places. [2022-11-23 04:02:18,858 INFO L231 Difference]: Finished difference. Result has 481 places, 1091 transitions, 30526 flow [2022-11-23 04:02:18,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=24848, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30526, PETRI_PLACES=481, PETRI_TRANSITIONS=1091} [2022-11-23 04:02:18,859 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 461 predicate places. [2022-11-23 04:02:18,859 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1091 transitions, 30526 flow [2022-11-23 04:02:18,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:18,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:18,860 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:18,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-23 04:02:19,060 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:02:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 443286503, now seen corresponding path program 49 times [2022-11-23 04:02:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138834012] [2022-11-23 04:02:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138834012] [2022-11-23 04:02:19,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138834012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:02:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159857490] [2022-11-23 04:02:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:02:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:19,179 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:19,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-23 04:02:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:02:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159857490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:19,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:02:19,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:02:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680672656] [2022-11-23 04:02:19,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:19,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:02:19,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1091 transitions, 30526 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:19,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:19,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:02:19,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:24,772 INFO L130 PetriNetUnfolder]: 2852/5729 cut-off events. [2022-11-23 04:02:24,772 INFO L131 PetriNetUnfolder]: For 399299/399299 co-relation queries the response was YES. [2022-11-23 04:02:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71770 conditions, 5729 events. 2852/5729 cut-off events. For 399299/399299 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46652 event pairs, 68 based on Foata normal form. 22/5751 useless extension candidates. Maximal degree in co-relation 71592. Up to 1633 conditions per place. [2022-11-23 04:02:24,852 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 681 selfloop transitions, 497 changer transitions 4/1182 dead transitions. [2022-11-23 04:02:24,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1182 transitions, 34904 flow [2022-11-23 04:02:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 04:02:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 04:02:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5541 transitions. [2022-11-23 04:02:24,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320804741110418 [2022-11-23 04:02:24,858 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5541 transitions. [2022-11-23 04:02:24,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5541 transitions. [2022-11-23 04:02:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5541 transitions. [2022-11-23 04:02:24,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 197.89285714285714) internal successors, (5541), 28 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:24,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 458.0) internal successors, (13282), 29 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:24,947 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 458.0) internal successors, (13282), 29 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:24,947 INFO L175 Difference]: Start difference. First operand has 481 places, 1091 transitions, 30526 flow. Second operand 28 states and 5541 transitions. [2022-11-23 04:02:24,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1182 transitions, 34904 flow [2022-11-23 04:02:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1182 transitions, 32672 flow, removed 780 selfloop flow, removed 21 redundant places. [2022-11-23 04:02:29,969 INFO L231 Difference]: Finished difference. Result has 489 places, 1094 transitions, 30107 flow [2022-11-23 04:02:29,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=28092, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30107, PETRI_PLACES=489, PETRI_TRANSITIONS=1094} [2022-11-23 04:02:29,971 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 469 predicate places. [2022-11-23 04:02:29,971 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1094 transitions, 30107 flow [2022-11-23 04:02:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:29,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:29,972 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:29,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:30,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:30,177 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:02:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 461806672, now seen corresponding path program 50 times [2022-11-23 04:02:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:30,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582945849] [2022-11-23 04:02:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582945849] [2022-11-23 04:02:30,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582945849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:02:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812495626] [2022-11-23 04:02:30,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:02:30,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:30,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:30,272 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:30,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-23 04:02:30,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:02:30,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:02:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:30,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:30,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812495626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:30,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:02:30,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:02:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658890262] [2022-11-23 04:02:30,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:30,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:30,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:02:30,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1094 transitions, 30107 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:30,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:30,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:02:30,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:35,266 INFO L130 PetriNetUnfolder]: 2839/5724 cut-off events. [2022-11-23 04:02:35,266 INFO L131 PetriNetUnfolder]: For 364385/364385 co-relation queries the response was YES. [2022-11-23 04:02:35,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69833 conditions, 5724 events. 2839/5724 cut-off events. For 364385/364385 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 46571 event pairs, 562 based on Foata normal form. 32/5756 useless extension candidates. Maximal degree in co-relation 69654. Up to 2668 conditions per place. [2022-11-23 04:02:35,345 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 749 selfloop transitions, 483 changer transitions 1/1233 dead transitions. [2022-11-23 04:02:35,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1233 transitions, 35447 flow [2022-11-23 04:02:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 04:02:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 04:02:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4379 transitions. [2022-11-23 04:02:35,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43459706232631995 [2022-11-23 04:02:35,350 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4379 transitions. [2022-11-23 04:02:35,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4379 transitions. [2022-11-23 04:02:35,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:35,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4379 transitions. [2022-11-23 04:02:35,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.04545454545453) internal successors, (4379), 22 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:35,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:35,359 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:35,359 INFO L175 Difference]: Start difference. First operand has 489 places, 1094 transitions, 30107 flow. Second operand 22 states and 4379 transitions. [2022-11-23 04:02:35,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1233 transitions, 35447 flow [2022-11-23 04:02:39,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1233 transitions, 33330 flow, removed 684 selfloop flow, removed 14 redundant places. [2022-11-23 04:02:39,977 INFO L231 Difference]: Finished difference. Result has 498 places, 1108 transitions, 29839 flow [2022-11-23 04:02:39,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=28087, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=29839, PETRI_PLACES=498, PETRI_TRANSITIONS=1108} [2022-11-23 04:02:39,979 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 478 predicate places. [2022-11-23 04:02:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1108 transitions, 29839 flow [2022-11-23 04:02:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:39,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:39,980 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:39,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:40,186 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:02:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1308151910, now seen corresponding path program 51 times [2022-11-23 04:02:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:40,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895018895] [2022-11-23 04:02:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:40,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895018895] [2022-11-23 04:02:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895018895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:02:40,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340185125] [2022-11-23 04:02:40,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:02:40,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:40,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:40,295 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 04:02:40,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:02:40,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:40,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:02:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:40,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:40,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340185125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:40,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:02:40,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:02:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294401921] [2022-11-23 04:02:40,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:40,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:40,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:02:40,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1108 transitions, 29839 flow. Second operand has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:40,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:40,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:02:40,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:45,644 INFO L130 PetriNetUnfolder]: 2981/6026 cut-off events. [2022-11-23 04:02:45,644 INFO L131 PetriNetUnfolder]: For 332183/332183 co-relation queries the response was YES. [2022-11-23 04:02:45,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71213 conditions, 6026 events. 2981/6026 cut-off events. For 332183/332183 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 49346 event pairs, 414 based on Foata normal form. 28/6054 useless extension candidates. Maximal degree in co-relation 71034. Up to 2130 conditions per place. [2022-11-23 04:02:45,731 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 724 selfloop transitions, 547 changer transitions 17/1288 dead transitions. [2022-11-23 04:02:45,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1288 transitions, 36060 flow [2022-11-23 04:02:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 04:02:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 04:02:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5351 transitions. [2022-11-23 04:02:45,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327187449458192 [2022-11-23 04:02:45,736 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5351 transitions. [2022-11-23 04:02:45,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5351 transitions. [2022-11-23 04:02:45,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:45,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5351 transitions. [2022-11-23 04:02:45,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.1851851851852) internal successors, (5351), 27 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:45,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 458.0) internal successors, (12824), 28 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:45,746 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 458.0) internal successors, (12824), 28 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:45,746 INFO L175 Difference]: Start difference. First operand has 498 places, 1108 transitions, 29839 flow. Second operand 27 states and 5351 transitions. [2022-11-23 04:02:45,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1288 transitions, 36060 flow [2022-11-23 04:02:50,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1288 transitions, 35348 flow, removed 144 selfloop flow, removed 13 redundant places. [2022-11-23 04:02:50,481 INFO L231 Difference]: Finished difference. Result has 515 places, 1136 transitions, 31633 flow [2022-11-23 04:02:50,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=29035, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31633, PETRI_PLACES=515, PETRI_TRANSITIONS=1136} [2022-11-23 04:02:50,483 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 495 predicate places. [2022-11-23 04:02:50,483 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1136 transitions, 31633 flow [2022-11-23 04:02:50,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:50,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:50,484 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:50,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-23 04:02:50,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-23 04:02:50,689 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:02:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:50,690 INFO L85 PathProgramCache]: Analyzing trace with hash -656442713, now seen corresponding path program 52 times [2022-11-23 04:02:50,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307511798] [2022-11-23 04:02:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:50,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:50,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307511798] [2022-11-23 04:02:50,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307511798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:02:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44247904] [2022-11-23 04:02:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:02:50,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:02:50,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:02:50,803 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:02:50,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-23 04:02:50,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:02:50,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:02:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:02:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:02:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:51,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:02:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:02:51,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44247904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:02:51,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:02:51,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-23 04:02:51,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046010248] [2022-11-23 04:02:51,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:02:51,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:02:51,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:02:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:02:51,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:02:51,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1136 transitions, 31633 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:51,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:51,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:02:51,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:56,795 INFO L130 PetriNetUnfolder]: 3152/6329 cut-off events. [2022-11-23 04:02:56,796 INFO L131 PetriNetUnfolder]: For 371714/371714 co-relation queries the response was YES. [2022-11-23 04:02:56,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75795 conditions, 6329 events. 3152/6329 cut-off events. For 371714/371714 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 52021 event pairs, 228 based on Foata normal form. 84/6413 useless extension candidates. Maximal degree in co-relation 75614. Up to 4832 conditions per place. [2022-11-23 04:02:57,049 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1014 selfloop transitions, 299 changer transitions 1/1314 dead transitions. [2022-11-23 04:02:57,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1314 transitions, 37935 flow [2022-11-23 04:02:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 04:02:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 04:02:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4181 transitions. [2022-11-23 04:02:57,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43470576003327094 [2022-11-23 04:02:57,054 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4181 transitions. [2022-11-23 04:02:57,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4181 transitions. [2022-11-23 04:02:57,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:57,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4181 transitions. [2022-11-23 04:02:57,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 199.0952380952381) internal successors, (4181), 21 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:57,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:57,066 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:02:57,066 INFO L175 Difference]: Start difference. First operand has 515 places, 1136 transitions, 31633 flow. Second operand 21 states and 4181 transitions. [2022-11-23 04:02:57,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1314 transitions, 37935 flow [2022-11-23 04:03:03,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1314 transitions, 37065 flow, removed 100 selfloop flow, removed 18 redundant places. [2022-11-23 04:03:03,860 INFO L231 Difference]: Finished difference. Result has 518 places, 1214 transitions, 33643 flow [2022-11-23 04:03:03,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=30814, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=33643, PETRI_PLACES=518, PETRI_TRANSITIONS=1214} [2022-11-23 04:03:03,861 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 498 predicate places. [2022-11-23 04:03:03,862 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1214 transitions, 33643 flow [2022-11-23 04:03:03,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:03,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:03:03,863 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:03:03,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-23 04:03:04,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:04,068 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:03:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:03:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1812549951, now seen corresponding path program 53 times [2022-11-23 04:03:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:03:04,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74032505] [2022-11-23 04:03:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:03:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:03:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:03:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:03:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:03:04,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74032505] [2022-11-23 04:03:04,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74032505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:03:04,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026081052] [2022-11-23 04:03:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:03:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:03:04,195 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:03:04,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-23 04:03:04,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:03:04,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:03:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:03:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:03:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:04,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:03:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:03:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026081052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:03:04,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:03:04,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-11-23 04:03:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646564223] [2022-11-23 04:03:04,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:03:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:03:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:03:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:03:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:03:04,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:03:04,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1214 transitions, 33643 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:04,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:03:04,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:03:04,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:03:11,641 INFO L130 PetriNetUnfolder]: 3523/7100 cut-off events. [2022-11-23 04:03:11,641 INFO L131 PetriNetUnfolder]: For 446189/446189 co-relation queries the response was YES. [2022-11-23 04:03:11,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87895 conditions, 7100 events. 3523/7100 cut-off events. For 446189/446189 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 59733 event pairs, 162 based on Foata normal form. 62/7162 useless extension candidates. Maximal degree in co-relation 87710. Up to 2138 conditions per place. [2022-11-23 04:03:11,803 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 792 selfloop transitions, 671 changer transitions 5/1468 dead transitions. [2022-11-23 04:03:11,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1468 transitions, 43297 flow [2022-11-23 04:03:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 04:03:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 04:03:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6541 transitions. [2022-11-23 04:03:11,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327775572317057 [2022-11-23 04:03:11,809 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6541 transitions. [2022-11-23 04:03:11,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6541 transitions. [2022-11-23 04:03:11,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:03:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6541 transitions. [2022-11-23 04:03:11,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 198.21212121212122) internal successors, (6541), 33 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:11,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 458.0) internal successors, (15572), 34 states have internal predecessors, (15572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:11,822 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 458.0) internal successors, (15572), 34 states have internal predecessors, (15572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:11,822 INFO L175 Difference]: Start difference. First operand has 518 places, 1214 transitions, 33643 flow. Second operand 33 states and 6541 transitions. [2022-11-23 04:03:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1468 transitions, 43297 flow [2022-11-23 04:03:18,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1468 transitions, 42912 flow, removed 129 selfloop flow, removed 11 redundant places. [2022-11-23 04:03:18,196 INFO L231 Difference]: Finished difference. Result has 549 places, 1332 transitions, 40000 flow [2022-11-23 04:03:18,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=32552, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40000, PETRI_PLACES=549, PETRI_TRANSITIONS=1332} [2022-11-23 04:03:18,197 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 529 predicate places. [2022-11-23 04:03:18,198 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 1332 transitions, 40000 flow [2022-11-23 04:03:18,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:18,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:03:18,198 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:03:18,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-23 04:03:18,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:18,400 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:03:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:03:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 829486129, now seen corresponding path program 54 times [2022-11-23 04:03:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:03:18,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662925723] [2022-11-23 04:03:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:03:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:03:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:03:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:18,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:03:18,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662925723] [2022-11-23 04:03:18,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662925723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:03:18,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337402973] [2022-11-23 04:03:18,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:03:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:03:18,499 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:03:18,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 04:03:18,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:03:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:03:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:03:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:03:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:18,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:03:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:18,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337402973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:03:18,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:03:18,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-11-23 04:03:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568729764] [2022-11-23 04:03:18,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:03:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:03:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:03:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:03:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:03:18,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:03:18,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1332 transitions, 40000 flow. Second operand has 15 states, 15 states have (on average 195.06666666666666) internal successors, (2926), 15 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:18,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:03:18,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:03:18,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:03:26,146 INFO L130 PetriNetUnfolder]: 3466/6981 cut-off events. [2022-11-23 04:03:26,146 INFO L131 PetriNetUnfolder]: For 490398/490398 co-relation queries the response was YES. [2022-11-23 04:03:26,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89546 conditions, 6981 events. 3466/6981 cut-off events. For 490398/490398 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 58666 event pairs, 174 based on Foata normal form. 122/7103 useless extension candidates. Maximal degree in co-relation 89352. Up to 3240 conditions per place. [2022-11-23 04:03:26,277 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 876 selfloop transitions, 548 changer transitions 0/1424 dead transitions. [2022-11-23 04:03:26,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1424 transitions, 44043 flow [2022-11-23 04:03:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 04:03:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-23 04:03:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4583 transitions. [2022-11-23 04:03:26,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4350674007974179 [2022-11-23 04:03:26,284 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4583 transitions. [2022-11-23 04:03:26,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4583 transitions. [2022-11-23 04:03:26,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:03:26,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4583 transitions. [2022-11-23 04:03:26,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 199.2608695652174) internal successors, (4583), 23 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:26,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 458.0) internal successors, (10992), 24 states have internal predecessors, (10992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:26,298 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 458.0) internal successors, (10992), 24 states have internal predecessors, (10992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:26,298 INFO L175 Difference]: Start difference. First operand has 549 places, 1332 transitions, 40000 flow. Second operand 23 states and 4583 transitions. [2022-11-23 04:03:26,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1424 transitions, 44043 flow [2022-11-23 04:03:35,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1424 transitions, 42324 flow, removed 696 selfloop flow, removed 14 redundant places. [2022-11-23 04:03:35,154 INFO L231 Difference]: Finished difference. Result has 558 places, 1311 transitions, 38977 flow [2022-11-23 04:03:35,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=36969, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=38977, PETRI_PLACES=558, PETRI_TRANSITIONS=1311} [2022-11-23 04:03:35,155 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 538 predicate places. [2022-11-23 04:03:35,156 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1311 transitions, 38977 flow [2022-11-23 04:03:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 195.06666666666666) internal successors, (2926), 15 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:35,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:03:35,157 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:03:35,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-23 04:03:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-23 04:03:35,363 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:03:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:03:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1313732249, now seen corresponding path program 55 times [2022-11-23 04:03:35,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:03:35,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222840305] [2022-11-23 04:03:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:03:35,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:03:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:03:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:35,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:03:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222840305] [2022-11-23 04:03:35,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222840305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:03:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695734813] [2022-11-23 04:03:35,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:03:35,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:35,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:03:35,467 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:03:35,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-23 04:03:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:03:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:03:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:03:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:03:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695734813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:03:35,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:03:35,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-23 04:03:35,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513646695] [2022-11-23 04:03:35,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:03:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 04:03:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:03:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 04:03:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 04:03:35,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:03:35,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1311 transitions, 38977 flow. Second operand has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:35,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:03:35,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:03:35,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:03:42,636 INFO L130 PetriNetUnfolder]: 3544/7111 cut-off events. [2022-11-23 04:03:42,636 INFO L131 PetriNetUnfolder]: For 442183/442183 co-relation queries the response was YES. [2022-11-23 04:03:42,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90442 conditions, 7111 events. 3544/7111 cut-off events. For 442183/442183 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 59599 event pairs, 170 based on Foata normal form. 14/7125 useless extension candidates. Maximal degree in co-relation 90250. Up to 2337 conditions per place. [2022-11-23 04:03:42,800 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 770 selfloop transitions, 662 changer transitions 9/1441 dead transitions. [2022-11-23 04:03:42,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1441 transitions, 44796 flow [2022-11-23 04:03:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 04:03:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-23 04:03:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5928 transitions. [2022-11-23 04:03:42,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4314410480349345 [2022-11-23 04:03:42,807 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5928 transitions. [2022-11-23 04:03:42,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5928 transitions. [2022-11-23 04:03:42,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:03:42,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5928 transitions. [2022-11-23 04:03:42,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 197.6) internal successors, (5928), 30 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:42,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 458.0) internal successors, (14198), 31 states have internal predecessors, (14198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:42,819 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 458.0) internal successors, (14198), 31 states have internal predecessors, (14198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:42,819 INFO L175 Difference]: Start difference. First operand has 558 places, 1311 transitions, 38977 flow. Second operand 30 states and 5928 transitions. [2022-11-23 04:03:42,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1441 transitions, 44796 flow [2022-11-23 04:03:51,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1441 transitions, 44331 flow, removed 75 selfloop flow, removed 13 redundant places. [2022-11-23 04:03:51,309 INFO L231 Difference]: Finished difference. Result has 581 places, 1341 transitions, 41830 flow [2022-11-23 04:03:51,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=38405, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=622, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=41830, PETRI_PLACES=581, PETRI_TRANSITIONS=1341} [2022-11-23 04:03:51,311 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2022-11-23 04:03:51,311 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 1341 transitions, 41830 flow [2022-11-23 04:03:51,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:51,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:03:51,311 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:03:51,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-23 04:03:51,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-23 04:03:51,512 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:03:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:03:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1310043879, now seen corresponding path program 56 times [2022-11-23 04:03:51,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:03:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014327556] [2022-11-23 04:03:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:03:51,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:03:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:03:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:51,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:03:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014327556] [2022-11-23 04:03:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014327556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:03:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935003032] [2022-11-23 04:03:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:03:51,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:03:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:03:51,631 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:03:51,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-23 04:03:51,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:03:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:03:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:03:51,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:03:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:03:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:03:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:03:51,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935003032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:03:51,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:03:51,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-11-23 04:03:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424407709] [2022-11-23 04:03:51,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:03:51,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:03:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:03:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:03:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:03:52,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:03:52,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1341 transitions, 41830 flow. Second operand has 17 states, 17 states have (on average 194.76470588235293) internal successors, (3311), 17 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:03:52,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:03:52,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:03:52,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:04:00,268 INFO L130 PetriNetUnfolder]: 4041/8182 cut-off events. [2022-11-23 04:04:00,268 INFO L131 PetriNetUnfolder]: For 591777/591777 co-relation queries the response was YES. [2022-11-23 04:04:00,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109506 conditions, 8182 events. 4041/8182 cut-off events. For 591777/591777 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 71024 event pairs, 212 based on Foata normal form. 20/8202 useless extension candidates. Maximal degree in co-relation 109308. Up to 2383 conditions per place. [2022-11-23 04:04:00,472 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 848 selfloop transitions, 813 changer transitions 3/1664 dead transitions. [2022-11-23 04:04:00,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1664 transitions, 54966 flow [2022-11-23 04:04:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 04:04:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-23 04:04:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7126 transitions. [2022-11-23 04:04:00,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4321931101407084 [2022-11-23 04:04:00,479 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7126 transitions. [2022-11-23 04:04:00,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7126 transitions. [2022-11-23 04:04:00,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:04:00,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7126 transitions. [2022-11-23 04:04:00,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 197.94444444444446) internal successors, (7126), 36 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:00,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 458.0) internal successors, (16946), 37 states have internal predecessors, (16946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:00,493 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 458.0) internal successors, (16946), 37 states have internal predecessors, (16946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:00,493 INFO L175 Difference]: Start difference. First operand has 581 places, 1341 transitions, 41830 flow. Second operand 36 states and 7126 transitions. [2022-11-23 04:04:00,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1664 transitions, 54966 flow [2022-11-23 04:04:11,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1664 transitions, 54176 flow, removed 314 selfloop flow, removed 11 redundant places. [2022-11-23 04:04:11,825 INFO L231 Difference]: Finished difference. Result has 612 places, 1511 transitions, 50764 flow [2022-11-23 04:04:11,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=41184, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=50764, PETRI_PLACES=612, PETRI_TRANSITIONS=1511} [2022-11-23 04:04:11,826 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 592 predicate places. [2022-11-23 04:04:11,826 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1511 transitions, 50764 flow [2022-11-23 04:04:11,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 194.76470588235293) internal successors, (3311), 17 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:11,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:04:11,827 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:04:11,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-23 04:04:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:04:12,032 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:04:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:04:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash 53261287, now seen corresponding path program 57 times [2022-11-23 04:04:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:04:12,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610732507] [2022-11-23 04:04:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:04:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:04:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:04:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:12,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:04:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610732507] [2022-11-23 04:04:12,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610732507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:04:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854501535] [2022-11-23 04:04:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:04:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:04:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:04:12,136 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:04:12,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-23 04:04:12,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:04:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:04:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:04:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:04:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:12,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:04:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:12,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854501535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:04:12,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:04:12,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-23 04:04:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516227366] [2022-11-23 04:04:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:04:12,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 04:04:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:04:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 04:04:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-23 04:04:12,610 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:04:12,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1511 transitions, 50764 flow. Second operand has 20 states, 20 states have (on average 194.55) internal successors, (3891), 20 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:12,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:04:12,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:04:12,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:04:22,821 INFO L130 PetriNetUnfolder]: 4231/8584 cut-off events. [2022-11-23 04:04:22,821 INFO L131 PetriNetUnfolder]: For 695889/695889 co-relation queries the response was YES. [2022-11-23 04:04:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120693 conditions, 8584 events. 4231/8584 cut-off events. For 695889/695889 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 75214 event pairs, 224 based on Foata normal form. 20/8604 useless extension candidates. Maximal degree in co-relation 120486. Up to 2244 conditions per place. [2022-11-23 04:04:23,007 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 814 selfloop transitions, 863 changer transitions 17/1694 dead transitions. [2022-11-23 04:04:23,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1694 transitions, 59888 flow [2022-11-23 04:04:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 04:04:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-23 04:04:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6717 transitions. [2022-11-23 04:04:23,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43135114307731826 [2022-11-23 04:04:23,016 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6717 transitions. [2022-11-23 04:04:23,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6717 transitions. [2022-11-23 04:04:23,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:04:23,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6717 transitions. [2022-11-23 04:04:23,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 197.55882352941177) internal successors, (6717), 34 states have internal predecessors, (6717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:23,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:23,039 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 458.0) internal successors, (16030), 35 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:23,039 INFO L175 Difference]: Start difference. First operand has 612 places, 1511 transitions, 50764 flow. Second operand 34 states and 6717 transitions. [2022-11-23 04:04:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1694 transitions, 59888 flow [2022-11-23 04:04:38,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1694 transitions, 57290 flow, removed 1191 selfloop flow, removed 16 redundant places. [2022-11-23 04:04:38,268 INFO L231 Difference]: Finished difference. Result has 637 places, 1579 transitions, 54812 flow [2022-11-23 04:04:38,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=49051, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=780, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=54812, PETRI_PLACES=637, PETRI_TRANSITIONS=1579} [2022-11-23 04:04:38,269 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 617 predicate places. [2022-11-23 04:04:38,269 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1579 transitions, 54812 flow [2022-11-23 04:04:38,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 194.55) internal successors, (3891), 20 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:38,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:04:38,269 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:04:38,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-23 04:04:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-23 04:04:38,470 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:04:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:04:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash 441060367, now seen corresponding path program 58 times [2022-11-23 04:04:38,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:04:38,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139303873] [2022-11-23 04:04:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:04:38,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:04:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:04:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:04:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139303873] [2022-11-23 04:04:38,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139303873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:04:38,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478626471] [2022-11-23 04:04:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:04:38,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:04:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:04:38,576 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:04:38,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-23 04:04:38,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:04:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:04:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:04:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:04:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:38,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:04:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:04:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478626471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:04:38,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:04:38,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-11-23 04:04:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356574506] [2022-11-23 04:04:38,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:04:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:04:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:04:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:04:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:04:38,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:04:38,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1579 transitions, 54812 flow. Second operand has 17 states, 17 states have (on average 194.76470588235293) internal successors, (3311), 17 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:38,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:04:38,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:04:38,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:04:50,322 INFO L130 PetriNetUnfolder]: 4573/9288 cut-off events. [2022-11-23 04:04:50,322 INFO L131 PetriNetUnfolder]: For 727050/727050 co-relation queries the response was YES. [2022-11-23 04:04:50,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130857 conditions, 9288 events. 4573/9288 cut-off events. For 727050/727050 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 82698 event pairs, 254 based on Foata normal form. 42/9330 useless extension candidates. Maximal degree in co-relation 130642. Up to 3122 conditions per place. [2022-11-23 04:04:50,517 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 953 selfloop transitions, 877 changer transitions 0/1830 dead transitions. [2022-11-23 04:04:50,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1830 transitions, 66139 flow [2022-11-23 04:04:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 04:04:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 04:04:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4784 transitions. [2022-11-23 04:04:50,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43522561863173215 [2022-11-23 04:04:50,521 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4784 transitions. [2022-11-23 04:04:50,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4784 transitions. [2022-11-23 04:04:50,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:04:50,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4784 transitions. [2022-11-23 04:04:50,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 199.33333333333334) internal successors, (4784), 24 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:50,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 458.0) internal successors, (11450), 25 states have internal predecessors, (11450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:50,530 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 458.0) internal successors, (11450), 25 states have internal predecessors, (11450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:04:50,531 INFO L175 Difference]: Start difference. First operand has 637 places, 1579 transitions, 54812 flow. Second operand 24 states and 4784 transitions. [2022-11-23 04:04:50,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1830 transitions, 66139 flow [2022-11-23 04:05:06,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1830 transitions, 64407 flow, removed 414 selfloop flow, removed 18 redundant places. [2022-11-23 04:05:07,014 INFO L231 Difference]: Finished difference. Result has 642 places, 1686 transitions, 60177 flow [2022-11-23 04:05:07,014 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=52929, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=60177, PETRI_PLACES=642, PETRI_TRANSITIONS=1686} [2022-11-23 04:05:07,015 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2022-11-23 04:05:07,015 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1686 transitions, 60177 flow [2022-11-23 04:05:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 194.76470588235293) internal successors, (3311), 17 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:07,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:05:07,015 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:05:07,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-23 04:05:07,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:05:07,216 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:05:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:05:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1473269569, now seen corresponding path program 59 times [2022-11-23 04:05:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:05:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653604880] [2022-11-23 04:05:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:05:07,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:05:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:05:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:07,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:05:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653604880] [2022-11-23 04:05:07,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653604880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:05:07,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409744489] [2022-11-23 04:05:07,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:05:07,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:05:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:05:07,319 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:05:07,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-23 04:05:07,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:05:07,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:05:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:05:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:05:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:07,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:05:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:07,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409744489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:05:07,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:05:07,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 04:05:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844840164] [2022-11-23 04:05:07,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:05:07,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:05:07,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:05:07,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:05:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:05:07,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:05:07,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1686 transitions, 60177 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:07,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:05:07,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:05:07,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:05:20,665 INFO L130 PetriNetUnfolder]: 5070/10353 cut-off events. [2022-11-23 04:05:20,665 INFO L131 PetriNetUnfolder]: For 838480/838480 co-relation queries the response was YES. [2022-11-23 04:05:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148165 conditions, 10353 events. 5070/10353 cut-off events. For 838480/838480 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 94610 event pairs, 634 based on Foata normal form. 26/10379 useless extension candidates. Maximal degree in co-relation 147946. Up to 2769 conditions per place. [2022-11-23 04:05:20,879 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1090 selfloop transitions, 874 changer transitions 15/1979 dead transitions. [2022-11-23 04:05:20,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1979 transitions, 72652 flow [2022-11-23 04:05:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 04:05:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 04:05:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5346 transitions. [2022-11-23 04:05:20,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43231441048034935 [2022-11-23 04:05:20,886 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5346 transitions. [2022-11-23 04:05:20,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5346 transitions. [2022-11-23 04:05:20,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:05:20,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5346 transitions. [2022-11-23 04:05:20,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.0) internal successors, (5346), 27 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:20,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 458.0) internal successors, (12824), 28 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:20,898 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 458.0) internal successors, (12824), 28 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:20,898 INFO L175 Difference]: Start difference. First operand has 642 places, 1686 transitions, 60177 flow. Second operand 27 states and 5346 transitions. [2022-11-23 04:05:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1979 transitions, 72652 flow [2022-11-23 04:05:40,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 1979 transitions, 71822 flow, removed 233 selfloop flow, removed 14 redundant places. [2022-11-23 04:05:40,724 INFO L231 Difference]: Finished difference. Result has 663 places, 1839 transitions, 68019 flow [2022-11-23 04:05:40,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=59192, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=68019, PETRI_PLACES=663, PETRI_TRANSITIONS=1839} [2022-11-23 04:05:40,725 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 643 predicate places. [2022-11-23 04:05:40,725 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 1839 transitions, 68019 flow [2022-11-23 04:05:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:40,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:05:40,726 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:05:40,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-23 04:05:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-23 04:05:40,931 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:05:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:05:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1620701908, now seen corresponding path program 60 times [2022-11-23 04:05:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:05:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306873390] [2022-11-23 04:05:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:05:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:05:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:05:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:05:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306873390] [2022-11-23 04:05:41,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306873390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:05:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414394925] [2022-11-23 04:05:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:05:41,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:05:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:05:41,021 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:05:41,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-23 04:05:41,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:05:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:05:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:05:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:05:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:41,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:05:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:05:41,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414394925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:05:41,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:05:41,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-23 04:05:41,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778138050] [2022-11-23 04:05:41,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:05:41,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 04:05:41,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:05:41,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 04:05:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-23 04:05:41,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:05:41,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 1839 transitions, 68019 flow. Second operand has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:41,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:05:41,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:05:41,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:05:55,680 INFO L130 PetriNetUnfolder]: 5191/10532 cut-off events. [2022-11-23 04:05:55,680 INFO L131 PetriNetUnfolder]: For 914897/914897 co-relation queries the response was YES. [2022-11-23 04:05:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154970 conditions, 10532 events. 5191/10532 cut-off events. For 914897/914897 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 95632 event pairs, 265 based on Foata normal form. 30/10562 useless extension candidates. Maximal degree in co-relation 154744. Up to 8245 conditions per place. [2022-11-23 04:05:55,982 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 1510 selfloop transitions, 439 changer transitions 0/1949 dead transitions. [2022-11-23 04:05:55,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 1949 transitions, 74968 flow [2022-11-23 04:05:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:05:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:05:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1795 transitions. [2022-11-23 04:05:55,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354682193110141 [2022-11-23 04:05:55,984 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1795 transitions. [2022-11-23 04:05:55,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1795 transitions. [2022-11-23 04:05:55,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:05:55,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1795 transitions. [2022-11-23 04:05:55,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.44444444444446) internal successors, (1795), 9 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:55,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:55,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 458.0) internal successors, (4580), 10 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:05:55,988 INFO L175 Difference]: Start difference. First operand has 663 places, 1839 transitions, 68019 flow. Second operand 9 states and 1795 transitions. [2022-11-23 04:05:55,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 1949 transitions, 74968 flow [2022-11-23 04:06:21,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 1949 transitions, 73412 flow, removed 584 selfloop flow, removed 9 redundant places. [2022-11-23 04:06:21,468 INFO L231 Difference]: Finished difference. Result has 665 places, 1889 transitions, 69112 flow [2022-11-23 04:06:21,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=66470, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=69112, PETRI_PLACES=665, PETRI_TRANSITIONS=1889} [2022-11-23 04:06:21,469 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 645 predicate places. [2022-11-23 04:06:21,470 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 1889 transitions, 69112 flow [2022-11-23 04:06:21,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:06:21,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:06:21,471 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:06:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-23 04:06:21,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:06:21,672 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:06:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:06:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash 86819088, now seen corresponding path program 61 times [2022-11-23 04:06:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:06:21,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506840748] [2022-11-23 04:06:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:06:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:06:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:06:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:06:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:06:21,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506840748] [2022-11-23 04:06:21,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506840748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:06:21,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451637307] [2022-11-23 04:06:21,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:06:21,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:06:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:06:21,766 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:06:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-23 04:06:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:06:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:06:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:06:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:06:22,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:06:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:06:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451637307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:06:22,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:06:22,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-11-23 04:06:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623867956] [2022-11-23 04:06:22,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:06:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:06:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:06:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:06:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:06:22,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:06:22,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 1889 transitions, 69112 flow. Second operand has 17 states, 17 states have (on average 194.7058823529412) internal successors, (3310), 17 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:06:22,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:06:22,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:06:22,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:06:38,877 INFO L130 PetriNetUnfolder]: 5742/11609 cut-off events. [2022-11-23 04:06:38,877 INFO L131 PetriNetUnfolder]: For 1002738/1002738 co-relation queries the response was YES. [2022-11-23 04:06:39,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171546 conditions, 11609 events. 5742/11609 cut-off events. For 1002738/1002738 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 106606 event pairs, 485 based on Foata normal form. 108/11717 useless extension candidates. Maximal degree in co-relation 171318. Up to 7997 conditions per place. [2022-11-23 04:06:39,214 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1584 selfloop transitions, 651 changer transitions 0/2235 dead transitions. [2022-11-23 04:06:39,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2235 transitions, 85089 flow [2022-11-23 04:06:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 04:06:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 04:06:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4367 transitions. [2022-11-23 04:06:39,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334061135371179 [2022-11-23 04:06:39,219 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4367 transitions. [2022-11-23 04:06:39,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4367 transitions. [2022-11-23 04:06:39,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:06:39,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4367 transitions. [2022-11-23 04:06:39,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 198.5) internal successors, (4367), 22 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:06:39,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:06:39,230 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 458.0) internal successors, (10534), 23 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:06:39,231 INFO L175 Difference]: Start difference. First operand has 665 places, 1889 transitions, 69112 flow. Second operand 22 states and 4367 transitions. [2022-11-23 04:06:39,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2235 transitions, 85089 flow [2022-11-23 04:07:05,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 2235 transitions, 84338 flow, removed 45 selfloop flow, removed 6 redundant places. [2022-11-23 04:07:05,926 INFO L231 Difference]: Finished difference. Result has 689 places, 2094 transitions, 78052 flow [2022-11-23 04:07:05,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=68030, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=78052, PETRI_PLACES=689, PETRI_TRANSITIONS=2094} [2022-11-23 04:07:05,927 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 669 predicate places. [2022-11-23 04:07:05,928 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 2094 transitions, 78052 flow [2022-11-23 04:07:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 194.7058823529412) internal successors, (3310), 17 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:07:05,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:07:05,928 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:07:05,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-23 04:07:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:07:06,129 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:07:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:07:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash -425927478, now seen corresponding path program 62 times [2022-11-23 04:07:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:07:06,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242841200] [2022-11-23 04:07:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:07:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:07:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:07:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:07:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:07:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242841200] [2022-11-23 04:07:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242841200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:07:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743577097] [2022-11-23 04:07:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:07:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:07:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:07:06,294 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:07:06,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-23 04:07:06,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:07:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:07:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:07:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:07:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:07:06,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:07:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:07:06,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743577097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:07:06,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:07:06,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-23 04:07:06,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366149576] [2022-11-23 04:07:06,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:07:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 04:07:06,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:07:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 04:07:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-23 04:07:06,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:07:06,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 2094 transitions, 78052 flow. Second operand has 20 states, 20 states have (on average 194.75) internal successors, (3895), 20 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:07:06,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:07:06,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:07:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:07:26,089 INFO L130 PetriNetUnfolder]: 6186/12583 cut-off events. [2022-11-23 04:07:26,089 INFO L131 PetriNetUnfolder]: For 1180299/1180299 co-relation queries the response was YES. [2022-11-23 04:07:26,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192272 conditions, 12583 events. 6186/12583 cut-off events. For 1180299/1180299 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 117739 event pairs, 209 based on Foata normal form. 92/12675 useless extension candidates. Maximal degree in co-relation 192036. Up to 4931 conditions per place. [2022-11-23 04:07:26,480 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1346 selfloop transitions, 1060 changer transitions 15/2421 dead transitions. [2022-11-23 04:07:26,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 2421 transitions, 94139 flow [2022-11-23 04:07:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 04:07:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-23 04:07:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7523 transitions. [2022-11-23 04:07:26,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43225695242472995 [2022-11-23 04:07:26,486 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7523 transitions. [2022-11-23 04:07:26,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7523 transitions. [2022-11-23 04:07:26,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:07:26,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7523 transitions. [2022-11-23 04:07:26,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 197.97368421052633) internal successors, (7523), 38 states have internal predecessors, (7523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:07:26,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 458.0) internal successors, (17862), 39 states have internal predecessors, (17862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:07:26,503 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 458.0) internal successors, (17862), 39 states have internal predecessors, (17862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:07:26,503 INFO L175 Difference]: Start difference. First operand has 689 places, 2094 transitions, 78052 flow. Second operand 38 states and 7523 transitions. [2022-11-23 04:07:26,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 2421 transitions, 94139 flow [2022-11-23 04:08:04,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2421 transitions, 91695 flow, removed 1137 selfloop flow, removed 6 redundant places. [2022-11-23 04:08:04,307 INFO L231 Difference]: Finished difference. Result has 733 places, 2264 transitions, 87545 flow [2022-11-23 04:08:04,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=76191, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=87545, PETRI_PLACES=733, PETRI_TRANSITIONS=2264} [2022-11-23 04:08:04,309 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 713 predicate places. [2022-11-23 04:08:04,309 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 2264 transitions, 87545 flow [2022-11-23 04:08:04,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 194.75) internal successors, (3895), 20 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:08:04,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:08:04,309 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:08:04,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-23 04:08:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:08:04,510 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:08:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:08:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash -947131184, now seen corresponding path program 63 times [2022-11-23 04:08:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:08:04,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12186616] [2022-11-23 04:08:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:08:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:08:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:08:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:08:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:08:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12186616] [2022-11-23 04:08:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12186616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:08:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314924290] [2022-11-23 04:08:04,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:08:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:08:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:08:04,604 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:08:04,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-23 04:08:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 04:08:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:08:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:08:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:08:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:08:04,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:08:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:08:04,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314924290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:08:04,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:08:04,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-23 04:08:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185562078] [2022-11-23 04:08:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:08:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 04:08:04,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:08:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 04:08:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 04:08:04,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:08:04,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 2264 transitions, 87545 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:08:04,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:08:04,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:08:04,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:08:28,022 INFO L130 PetriNetUnfolder]: 6177/12544 cut-off events. [2022-11-23 04:08:28,022 INFO L131 PetriNetUnfolder]: For 1221977/1221977 co-relation queries the response was YES. [2022-11-23 04:08:28,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194685 conditions, 12544 events. 6177/12544 cut-off events. For 1221977/1221977 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 117234 event pairs, 579 based on Foata normal form. 64/12608 useless extension candidates. Maximal degree in co-relation 194436. Up to 10237 conditions per place. [2022-11-23 04:08:28,447 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1845 selfloop transitions, 535 changer transitions 1/2381 dead transitions. [2022-11-23 04:08:28,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 2381 transitions, 96023 flow [2022-11-23 04:08:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 04:08:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 04:08:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4164 transitions. [2022-11-23 04:08:28,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329382407985028 [2022-11-23 04:08:28,452 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4164 transitions. [2022-11-23 04:08:28,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4164 transitions. [2022-11-23 04:08:28,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:08:28,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4164 transitions. [2022-11-23 04:08:28,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.28571428571428) internal successors, (4164), 21 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:08:28,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:08:28,577 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 458.0) internal successors, (10076), 22 states have internal predecessors, (10076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:08:28,577 INFO L175 Difference]: Start difference. First operand has 733 places, 2264 transitions, 87545 flow. Second operand 21 states and 4164 transitions. [2022-11-23 04:08:28,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 2381 transitions, 96023 flow [2022-11-23 04:09:12,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 2381 transitions, 90700 flow, removed 2373 selfloop flow, removed 16 redundant places. [2022-11-23 04:09:12,129 INFO L231 Difference]: Finished difference. Result has 741 places, 2299 transitions, 85896 flow [2022-11-23 04:09:12,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=82589, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=85896, PETRI_PLACES=741, PETRI_TRANSITIONS=2299} [2022-11-23 04:09:12,130 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 721 predicate places. [2022-11-23 04:09:12,131 INFO L495 AbstractCegarLoop]: Abstraction has has 741 places, 2299 transitions, 85896 flow [2022-11-23 04:09:12,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:09:12,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:09:12,131 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:09:12,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-23 04:09:12,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:12,332 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:09:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:09:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2060992853, now seen corresponding path program 64 times [2022-11-23 04:09:12,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:09:12,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234112737] [2022-11-23 04:09:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:09:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:09:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:09:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:09:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234112737] [2022-11-23 04:09:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234112737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:09:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678736051] [2022-11-23 04:09:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:09:12,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:09:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:09:12,461 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:09:12,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a71dc438-c878-48ef-8c64-ba5c8566b6d9/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-23 04:09:12,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:09:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:09:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:09:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:09:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:09:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:09:12,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678736051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:09:12,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:09:12,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-23 04:09:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176856090] [2022-11-23 04:09:12,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:09:12,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 04:09:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:09:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 04:09:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-23 04:09:12,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 458 [2022-11-23 04:09:12,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 2299 transitions, 85896 flow. Second operand has 20 states, 20 states have (on average 194.55) internal successors, (3891), 20 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:09:12,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:09:12,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 458 [2022-11-23 04:09:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:09:38,630 INFO L130 PetriNetUnfolder]: 6709/13674 cut-off events. [2022-11-23 04:09:38,630 INFO L131 PetriNetUnfolder]: For 1190272/1190272 co-relation queries the response was YES. [2022-11-23 04:09:38,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202913 conditions, 13674 events. 6709/13674 cut-off events. For 1190272/1190272 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 129982 event pairs, 1169 based on Foata normal form. 60/13734 useless extension candidates. Maximal degree in co-relation 202663. Up to 4605 conditions per place. [2022-11-23 04:09:39,084 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 1661 selfloop transitions, 969 changer transitions 22/2652 dead transitions. [2022-11-23 04:09:39,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 2652 transitions, 102557 flow [2022-11-23 04:09:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 04:09:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-23 04:09:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7513 transitions. [2022-11-23 04:09:39,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.431682371868536 [2022-11-23 04:09:39,092 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7513 transitions. [2022-11-23 04:09:39,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7513 transitions. [2022-11-23 04:09:39,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:09:39,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7513 transitions. [2022-11-23 04:09:39,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 197.71052631578948) internal successors, (7513), 38 states have internal predecessors, (7513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:09:39,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 458.0) internal successors, (17862), 39 states have internal predecessors, (17862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:09:39,110 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 458.0) internal successors, (17862), 39 states have internal predecessors, (17862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:09:39,110 INFO L175 Difference]: Start difference. First operand has 741 places, 2299 transitions, 85896 flow. Second operand 38 states and 7513 transitions. [2022-11-23 04:09:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 2652 transitions, 102557 flow