./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:14:53,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:14:53,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:14:53,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:14:53,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:14:53,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:14:53,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:14:53,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:14:53,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:14:53,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:14:53,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:14:53,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:14:53,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:14:53,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:14:53,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:14:53,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:14:53,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:14:53,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:14:53,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:14:53,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:14:53,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:14:53,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:14:53,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:14:53,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:14:53,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:14:53,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:14:53,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:14:53,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:14:53,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:14:53,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:14:53,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:14:53,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:14:53,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:14:53,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:14:53,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:14:53,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:14:53,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:14:53,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:14:53,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:14:53,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:14:53,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:14:53,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:14:53,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:14:53,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:14:53,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:14:53,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:14:53,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:14:53,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:14:53,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:14:53,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:14:53,902 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:14:53,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:14:53,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:14:53,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:14:53,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:14:53,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:14:53,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:14:53,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:14:53,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:14:53,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:14:53,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:14:53,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:14:53,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:14:53,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:14:53,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:14:53,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:14:53,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:53,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:14:53,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:14:53,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:14:53,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:14:53,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:14:53,908 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:14:53,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:14:53,908 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:14:53,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:14:53,909 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_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e [2022-11-25 18:14:54,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:14:54,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:14:54,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:14:54,247 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:14:54,247 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:14:54,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-25 18:14:57,400 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:14:57,693 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:14:57,694 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-25 18:14:57,702 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/data/651f47f41/428df5e908424d238a8d0d949380eb16/FLAG00fce4b7d [2022-11-25 18:14:57,720 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/data/651f47f41/428df5e908424d238a8d0d949380eb16 [2022-11-25 18:14:57,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:14:57,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:14:57,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:57,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:14:57,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:14:57,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:57,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb9f560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57, skipping insertion in model container [2022-11-25 18:14:57,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:57,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:14:57,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:14:57,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,931 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_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-25 18:14:57,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:57,958 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:14:57,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:14:57,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:14:57,985 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_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-25 18:14:57,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:14:57,999 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:14:57,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57 WrapperNode [2022-11-25 18:14:58,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:14:58,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:58,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:14:58,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:14:58,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,040 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2022-11-25 18:14:58,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:14:58,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:14:58,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:14:58,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:14:58,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,066 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:14:58,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:14:58,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:14:58,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:14:58,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (1/1) ... [2022-11-25 18:14:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:14:58,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:14:58,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:14:58,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:14:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:14:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:14:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:14:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:14:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:14:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:14:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:14:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 18:14:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 18:14:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:14:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:14:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:14:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:14:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:14:58,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:14:58,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:14:58,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:14:58,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:14:58,179 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:14:58,312 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:14:58,314 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:14:58,601 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:14:58,679 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:14:58,679 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:14:58,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:58 BoogieIcfgContainer [2022-11-25 18:14:58,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:14:58,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:14:58,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:14:58,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:14:58,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:14:57" (1/3) ... [2022-11-25 18:14:58,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529439e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:58, skipping insertion in model container [2022-11-25 18:14:58,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:14:57" (2/3) ... [2022-11-25 18:14:58,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529439e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:14:58, skipping insertion in model container [2022-11-25 18:14:58,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:14:58" (3/3) ... [2022-11-25 18:14:58,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2022-11-25 18:14:58,721 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:14:58,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:14:58,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:14:58,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:14:58,917 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 18:14:58,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 128 transitions, 288 flow [2022-11-25 18:14:59,077 INFO L130 PetriNetUnfolder]: 9/124 cut-off events. [2022-11-25 18:14:59,078 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 18:14:59,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 9/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-11-25 18:14:59,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 128 transitions, 288 flow [2022-11-25 18:14:59,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 111 transitions, 246 flow [2022-11-25 18:14:59,093 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:14:59,109 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 111 transitions, 246 flow [2022-11-25 18:14:59,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 111 transitions, 246 flow [2022-11-25 18:14:59,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 111 transitions, 246 flow [2022-11-25 18:14:59,148 INFO L130 PetriNetUnfolder]: 9/111 cut-off events. [2022-11-25 18:14:59,148 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 18:14:59,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 111 events. 9/111 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-11-25 18:14:59,152 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2022-11-25 18:15:03,413 INFO L134 LiptonReduction]: Checked pairs total: 2488 [2022-11-25 18:15:03,414 INFO L136 LiptonReduction]: Total number of compositions: 91 [2022-11-25 18:15:03,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:03,439 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;@557c4c61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:03,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 18:15:03,448 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2022-11-25 18:15:03,448 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 18:15:03,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:03,449 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:03,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 103141693, now seen corresponding path program 1 times [2022-11-25 18:15:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:03,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831403393] [2022-11-25 18:15:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:04,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831403393] [2022-11-25 18:15:04,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831403393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:04,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:04,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009560628] [2022-11-25 18:15:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:15:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:15:04,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:15:04,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 219 [2022-11-25 18:15:04,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:04,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 219 [2022-11-25 18:15:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:04,775 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2022-11-25 18:15:04,776 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-11-25 18:15:04,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1954 events. 1537/1954 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6395 event pairs, 141 based on Foata normal form. 1/1127 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2022-11-25 18:15:04,797 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2022-11-25 18:15:04,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 241 flow [2022-11-25 18:15:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-11-25 18:15:04,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5525114155251142 [2022-11-25 18:15:04,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-11-25 18:15:04,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-11-25 18:15:04,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:04,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-11-25 18:15:04,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,851 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 363 transitions. [2022-11-25 18:15:04,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 241 flow [2022-11-25 18:15:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 18:15:04,861 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2022-11-25 18:15:04,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2022-11-25 18:15:04,867 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2022-11-25 18:15:04,867 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2022-11-25 18:15:04,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:04,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:04,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:04,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:15:04,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1884680349, now seen corresponding path program 1 times [2022-11-25 18:15:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229086944] [2022-11-25 18:15:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:05,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:05,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229086944] [2022-11-25 18:15:05,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229086944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:05,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:05,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994827831] [2022-11-25 18:15:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:05,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 219 [2022-11-25 18:15:05,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:05,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 219 [2022-11-25 18:15:05,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:05,678 INFO L130 PetriNetUnfolder]: 2495/3283 cut-off events. [2022-11-25 18:15:05,679 INFO L131 PetriNetUnfolder]: For 946/946 co-relation queries the response was YES. [2022-11-25 18:15:05,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 3283 events. 2495/3283 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13915 event pairs, 586 based on Foata normal form. 48/3311 useless extension candidates. Maximal degree in co-relation 2873. Up to 1616 conditions per place. [2022-11-25 18:15:05,702 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 84 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2022-11-25 18:15:05,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 91 transitions, 452 flow [2022-11-25 18:15:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2022-11-25 18:15:05,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.536986301369863 [2022-11-25 18:15:05,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2022-11-25 18:15:05,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2022-11-25 18:15:05,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:05,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2022-11-25 18:15:05,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,713 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 588 transitions. [2022-11-25 18:15:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 91 transitions, 452 flow [2022-11-25 18:15:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 91 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:05,716 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 129 flow [2022-11-25 18:15:05,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2022-11-25 18:15:05,717 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2022-11-25 18:15:05,718 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 129 flow [2022-11-25 18:15:05,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:05,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:05,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:05,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:15:05,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1505728347, now seen corresponding path program 1 times [2022-11-25 18:15:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595985081] [2022-11-25 18:15:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:05,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595985081] [2022-11-25 18:15:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595985081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300037172] [2022-11-25 18:15:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:05,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:05,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:05,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:05,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:15:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:06,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:06,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300037172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:06,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:06,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 18:15:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312345369] [2022-11-25 18:15:06,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:15:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:15:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:15:06,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:06,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 103.75) internal successors, (830), 8 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:06,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:06,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:06,996 INFO L130 PetriNetUnfolder]: 3361/4489 cut-off events. [2022-11-25 18:15:06,996 INFO L131 PetriNetUnfolder]: For 3906/4396 co-relation queries the response was YES. [2022-11-25 18:15:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 4489 events. 3361/4489 cut-off events. For 3906/4396 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21234 event pairs, 343 based on Foata normal form. 595/5013 useless extension candidates. Maximal degree in co-relation 8079. Up to 1944 conditions per place. [2022-11-25 18:15:07,028 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2022-11-25 18:15:07,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 532 flow [2022-11-25 18:15:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2022-11-25 18:15:07,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5296803652968036 [2022-11-25 18:15:07,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2022-11-25 18:15:07,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2022-11-25 18:15:07,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:07,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2022-11-25 18:15:07,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,036 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 129 flow. Second operand 5 states and 580 transitions. [2022-11-25 18:15:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 532 flow [2022-11-25 18:15:07,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 513 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:07,044 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 159 flow [2022-11-25 18:15:07,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-11-25 18:15:07,045 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2022-11-25 18:15:07,045 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 159 flow [2022-11-25 18:15:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.75) internal successors, (830), 8 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:07,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:07,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:15:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 18:15:07,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash 576705380, now seen corresponding path program 1 times [2022-11-25 18:15:07,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:07,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609193887] [2022-11-25 18:15:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:07,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609193887] [2022-11-25 18:15:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609193887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205663792] [2022-11-25 18:15:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:07,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:07,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:15:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:07,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:07,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205663792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:07,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:07,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 18:15:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313885336] [2022-11-25 18:15:07,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:07,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:15:07,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:15:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:15:07,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:07,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 103.75) internal successors, (830), 8 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:07,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:07,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:07,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:08,331 INFO L130 PetriNetUnfolder]: 3413/4567 cut-off events. [2022-11-25 18:15:08,332 INFO L131 PetriNetUnfolder]: For 5800/6224 co-relation queries the response was YES. [2022-11-25 18:15:08,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4567 events. 3413/4567 cut-off events. For 5800/6224 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20569 event pairs, 303 based on Foata normal form. 512/5015 useless extension candidates. Maximal degree in co-relation 11186. Up to 2034 conditions per place. [2022-11-25 18:15:08,372 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 88 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2022-11-25 18:15:08,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 573 flow [2022-11-25 18:15:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 578 transitions. [2022-11-25 18:15:08,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278538812785388 [2022-11-25 18:15:08,375 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 578 transitions. [2022-11-25 18:15:08,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 578 transitions. [2022-11-25 18:15:08,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:08,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 578 transitions. [2022-11-25 18:15:08,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,381 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 159 flow. Second operand 5 states and 578 transitions. [2022-11-25 18:15:08,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 573 flow [2022-11-25 18:15:08,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 96 transitions, 564 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:08,395 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 188 flow [2022-11-25 18:15:08,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2022-11-25 18:15:08,397 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2022-11-25 18:15:08,398 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 188 flow [2022-11-25 18:15:08,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.75) internal successors, (830), 8 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:08,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:08,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:08,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:08,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1172357353, now seen corresponding path program 2 times [2022-11-25 18:15:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:08,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433200052] [2022-11-25 18:15:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:08,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:08,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433200052] [2022-11-25 18:15:08,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433200052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079445920] [2022-11-25 18:15:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:08,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:08,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:15:08,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:08,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:08,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:08,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079445920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:08,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:08,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:08,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175270587] [2022-11-25 18:15:08,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:08,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:09,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:09,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:09,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:09,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:09,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:10,160 INFO L130 PetriNetUnfolder]: 6046/8172 cut-off events. [2022-11-25 18:15:10,160 INFO L131 PetriNetUnfolder]: For 17306/18528 co-relation queries the response was YES. [2022-11-25 18:15:10,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27562 conditions, 8172 events. 6046/8172 cut-off events. For 17306/18528 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 41063 event pairs, 1552 based on Foata normal form. 1327/9289 useless extension candidates. Maximal degree in co-relation 18693. Up to 3759 conditions per place. [2022-11-25 18:15:10,232 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 100 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2022-11-25 18:15:10,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 115 transitions, 742 flow [2022-11-25 18:15:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2022-11-25 18:15:10,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2022-11-25 18:15:10,235 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2022-11-25 18:15:10,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2022-11-25 18:15:10,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:10,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2022-11-25 18:15:10,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,241 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 188 flow. Second operand 5 states and 585 transitions. [2022-11-25 18:15:10,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 115 transitions, 742 flow [2022-11-25 18:15:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 115 transitions, 715 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:10,285 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 266 flow [2022-11-25 18:15:10,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-11-25 18:15:10,286 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2022-11-25 18:15:10,286 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 266 flow [2022-11-25 18:15:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:10,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:10,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:10,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:10,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1329939556, now seen corresponding path program 2 times [2022-11-25 18:15:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751469739] [2022-11-25 18:15:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751469739] [2022-11-25 18:15:10,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751469739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547060821] [2022-11-25 18:15:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:10,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:10,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:10,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:15:10,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:10,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:10,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547060821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:10,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:10,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:10,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005341475] [2022-11-25 18:15:10,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:10,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:10,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:10,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 266 flow. Second operand has 10 states, 10 states have (on average 103.5) internal successors, (1035), 10 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:10,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:10,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:13,083 INFO L130 PetriNetUnfolder]: 11562/15574 cut-off events. [2022-11-25 18:15:13,083 INFO L131 PetriNetUnfolder]: For 38988/41159 co-relation queries the response was YES. [2022-11-25 18:15:13,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57717 conditions, 15574 events. 11562/15574 cut-off events. For 38988/41159 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 83038 event pairs, 3302 based on Foata normal form. 1492/16698 useless extension candidates. Maximal degree in co-relation 39274. Up to 7706 conditions per place. [2022-11-25 18:15:13,247 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 112 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2022-11-25 18:15:13,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 128 transitions, 975 flow [2022-11-25 18:15:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2022-11-25 18:15:13,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5287671232876713 [2022-11-25 18:15:13,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2022-11-25 18:15:13,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2022-11-25 18:15:13,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:13,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2022-11-25 18:15:13,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:13,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:13,256 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:13,256 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 266 flow. Second operand 5 states and 579 transitions. [2022-11-25 18:15:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 128 transitions, 975 flow [2022-11-25 18:15:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 128 transitions, 967 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:13,466 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 359 flow [2022-11-25 18:15:13,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2022-11-25 18:15:13,467 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2022-11-25 18:15:13,467 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 359 flow [2022-11-25 18:15:13,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.5) internal successors, (1035), 10 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:13,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:13,468 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:13,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:13,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:15:13,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:13,669 INFO L85 PathProgramCache]: Analyzing trace with hash 60120217, now seen corresponding path program 3 times [2022-11-25 18:15:13,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:13,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848084822] [2022-11-25 18:15:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:13,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848084822] [2022-11-25 18:15:13,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848084822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:13,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244564159] [2022-11-25 18:15:13,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:15:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:13,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:13,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:15:13,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:15:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:13,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:13,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244564159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:13,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:13,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:13,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401620707] [2022-11-25 18:15:13,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:13,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:14,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:14,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 359 flow. Second operand has 10 states, 10 states have (on average 103.9) internal successors, (1039), 10 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:14,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:14,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:14,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:16,475 INFO L130 PetriNetUnfolder]: 11809/16005 cut-off events. [2022-11-25 18:15:16,475 INFO L131 PetriNetUnfolder]: For 54927/58469 co-relation queries the response was YES. [2022-11-25 18:15:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65477 conditions, 16005 events. 11809/16005 cut-off events. For 54927/58469 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 88473 event pairs, 2420 based on Foata normal form. 2026/17479 useless extension candidates. Maximal degree in co-relation 38114. Up to 6730 conditions per place. [2022-11-25 18:15:16,618 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 184 selfloop transitions, 16 changer transitions 0/205 dead transitions. [2022-11-25 18:15:16,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 205 transitions, 1633 flow [2022-11-25 18:15:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:15:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 931 transitions. [2022-11-25 18:15:16,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.531392694063927 [2022-11-25 18:15:16,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 931 transitions. [2022-11-25 18:15:16,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 931 transitions. [2022-11-25 18:15:16,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:16,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 931 transitions. [2022-11-25 18:15:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.375) internal successors, (931), 8 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:16,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:16,631 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:16,631 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 359 flow. Second operand 8 states and 931 transitions. [2022-11-25 18:15:16,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 205 transitions, 1633 flow [2022-11-25 18:15:16,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 205 transitions, 1573 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:16,861 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 478 flow [2022-11-25 18:15:16,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=478, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2022-11-25 18:15:16,864 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2022-11-25 18:15:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 478 flow [2022-11-25 18:15:16,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.9) internal successors, (1039), 10 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:16,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:16,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:16,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:17,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:15:17,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2091195078, now seen corresponding path program 3 times [2022-11-25 18:15:17,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:17,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123638813] [2022-11-25 18:15:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:17,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123638813] [2022-11-25 18:15:17,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123638813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718365068] [2022-11-25 18:15:17,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:15:17,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:17,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:17,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:17,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:15:17,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:15:17,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:17,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:17,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718365068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:17,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:17,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259932922] [2022-11-25 18:15:17,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:17,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:17,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 103.9) internal successors, (1039), 10 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:17,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:17,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:17,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:19,865 INFO L130 PetriNetUnfolder]: 12640/17137 cut-off events. [2022-11-25 18:15:19,865 INFO L131 PetriNetUnfolder]: For 67628/70940 co-relation queries the response was YES. [2022-11-25 18:15:19,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74662 conditions, 17137 events. 12640/17137 cut-off events. For 67628/70940 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 95847 event pairs, 1020 based on Foata normal form. 1399/18346 useless extension candidates. Maximal degree in co-relation 54627. Up to 7494 conditions per place. [2022-11-25 18:15:20,026 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 209 selfloop transitions, 17 changer transitions 0/231 dead transitions. [2022-11-25 18:15:20,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 231 transitions, 2186 flow [2022-11-25 18:15:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:15:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 925 transitions. [2022-11-25 18:15:20,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5279680365296804 [2022-11-25 18:15:20,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 925 transitions. [2022-11-25 18:15:20,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 925 transitions. [2022-11-25 18:15:20,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:20,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 925 transitions. [2022-11-25 18:15:20,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.625) internal successors, (925), 8 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,039 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,039 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 478 flow. Second operand 8 states and 925 transitions. [2022-11-25 18:15:20,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 231 transitions, 2186 flow [2022-11-25 18:15:20,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 231 transitions, 2050 flow, removed 24 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:20,234 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 585 flow [2022-11-25 18:15:20,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=585, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-25 18:15:20,235 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2022-11-25 18:15:20,235 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 585 flow [2022-11-25 18:15:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.9) internal successors, (1039), 10 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:20,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:20,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 82745576, now seen corresponding path program 1 times [2022-11-25 18:15:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068758277] [2022-11-25 18:15:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068758277] [2022-11-25 18:15:20,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068758277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:20,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:20,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:20,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5942551] [2022-11-25 18:15:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:20,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 219 [2022-11-25 18:15:20,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 585 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:20,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 219 [2022-11-25 18:15:20,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:22,720 INFO L130 PetriNetUnfolder]: 12835/17425 cut-off events. [2022-11-25 18:15:22,721 INFO L131 PetriNetUnfolder]: For 72887/77036 co-relation queries the response was YES. [2022-11-25 18:15:22,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80040 conditions, 17425 events. 12835/17425 cut-off events. For 72887/77036 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 95043 event pairs, 2146 based on Foata normal form. 1587/18657 useless extension candidates. Maximal degree in co-relation 62196. Up to 8908 conditions per place. [2022-11-25 18:15:22,906 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 135 selfloop transitions, 15 changer transitions 0/156 dead transitions. [2022-11-25 18:15:22,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 156 transitions, 1559 flow [2022-11-25 18:15:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2022-11-25 18:15:22,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5315068493150685 [2022-11-25 18:15:22,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2022-11-25 18:15:22,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2022-11-25 18:15:22,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:22,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2022-11-25 18:15:22,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,915 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,915 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 585 flow. Second operand 5 states and 582 transitions. [2022-11-25 18:15:22,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 156 transitions, 1559 flow [2022-11-25 18:15:23,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 156 transitions, 1493 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:23,334 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 632 flow [2022-11-25 18:15:23,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2022-11-25 18:15:23,335 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2022-11-25 18:15:23,335 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 632 flow [2022-11-25 18:15:23,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:23,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:23,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:15:23,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1916372263, now seen corresponding path program 2 times [2022-11-25 18:15:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295457388] [2022-11-25 18:15:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:23,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:23,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295457388] [2022-11-25 18:15:23,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295457388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:23,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:23,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861073207] [2022-11-25 18:15:23,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:23,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:23,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:23,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:23,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 632 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:23,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:23,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:23,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:25,873 INFO L130 PetriNetUnfolder]: 11880/16162 cut-off events. [2022-11-25 18:15:25,873 INFO L131 PetriNetUnfolder]: For 92526/96148 co-relation queries the response was YES. [2022-11-25 18:15:25,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76219 conditions, 16162 events. 11880/16162 cut-off events. For 92526/96148 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 90043 event pairs, 3370 based on Foata normal form. 1632/17580 useless extension candidates. Maximal degree in co-relation 58994. Up to 9314 conditions per place. [2022-11-25 18:15:26,014 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 144 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2022-11-25 18:15:26,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 164 transitions, 1675 flow [2022-11-25 18:15:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-11-25 18:15:26,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5351598173515981 [2022-11-25 18:15:26,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-11-25 18:15:26,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-11-25 18:15:26,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:26,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-11-25 18:15:26,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,037 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,037 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 632 flow. Second operand 5 states and 586 transitions. [2022-11-25 18:15:26,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 164 transitions, 1675 flow [2022-11-25 18:15:26,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 164 transitions, 1615 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:26,263 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 662 flow [2022-11-25 18:15:26,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=662, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2022-11-25 18:15:26,266 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2022-11-25 18:15:26,266 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 662 flow [2022-11-25 18:15:26,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:26,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:26,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:15:26,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1437184847, now seen corresponding path program 4 times [2022-11-25 18:15:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188767290] [2022-11-25 18:15:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:26,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188767290] [2022-11-25 18:15:26,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188767290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:26,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:26,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965584608] [2022-11-25 18:15:26,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:26,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:26,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 662 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:26,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:28,247 INFO L130 PetriNetUnfolder]: 11484/15545 cut-off events. [2022-11-25 18:15:28,247 INFO L131 PetriNetUnfolder]: For 87128/91723 co-relation queries the response was YES. [2022-11-25 18:15:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75307 conditions, 15545 events. 11484/15545 cut-off events. For 87128/91723 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 86819 event pairs, 2550 based on Foata normal form. 1914/17223 useless extension candidates. Maximal degree in co-relation 59110. Up to 8774 conditions per place. [2022-11-25 18:15:28,403 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 184 selfloop transitions, 17 changer transitions 2/209 dead transitions. [2022-11-25 18:15:28,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 209 transitions, 2121 flow [2022-11-25 18:15:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 701 transitions. [2022-11-25 18:15:28,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5334855403348554 [2022-11-25 18:15:28,409 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 701 transitions. [2022-11-25 18:15:28,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 701 transitions. [2022-11-25 18:15:28,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:28,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 701 transitions. [2022-11-25 18:15:28,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.83333333333333) internal successors, (701), 6 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:28,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:28,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:28,417 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 662 flow. Second operand 6 states and 701 transitions. [2022-11-25 18:15:28,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 209 transitions, 2121 flow [2022-11-25 18:15:28,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 209 transitions, 1991 flow, removed 27 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:28,816 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 708 flow [2022-11-25 18:15:28,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=708, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-11-25 18:15:28,817 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2022-11-25 18:15:28,817 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 708 flow [2022-11-25 18:15:28,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:28,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:28,818 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:28,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:15:28,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1218944596, now seen corresponding path program 2 times [2022-11-25 18:15:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:28,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882250633] [2022-11-25 18:15:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:28,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882250633] [2022-11-25 18:15:28,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882250633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046074178] [2022-11-25 18:15:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:28,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:28,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:28,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:15:29,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:29,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:29,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046074178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:29,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:29,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623895952] [2022-11-25 18:15:29,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:29,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:29,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 708 flow. Second operand has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:29,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:29,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:29,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:31,134 INFO L130 PetriNetUnfolder]: 11956/16139 cut-off events. [2022-11-25 18:15:31,134 INFO L131 PetriNetUnfolder]: For 90722/95181 co-relation queries the response was YES. [2022-11-25 18:15:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81620 conditions, 16139 events. 11956/16139 cut-off events. For 90722/95181 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 89968 event pairs, 3408 based on Foata normal form. 1998/17891 useless extension candidates. Maximal degree in co-relation 63881. Up to 8930 conditions per place. [2022-11-25 18:15:31,259 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 155 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2022-11-25 18:15:31,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 176 transitions, 1744 flow [2022-11-25 18:15:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2022-11-25 18:15:31,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5305936073059361 [2022-11-25 18:15:31,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2022-11-25 18:15:31,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2022-11-25 18:15:31,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:31,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2022-11-25 18:15:31,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,267 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 708 flow. Second operand 5 states and 581 transitions. [2022-11-25 18:15:31,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 176 transitions, 1744 flow [2022-11-25 18:15:31,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 176 transitions, 1686 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:31,537 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 701 flow [2022-11-25 18:15:31,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=701, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2022-11-25 18:15:31,538 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2022-11-25 18:15:31,538 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 701 flow [2022-11-25 18:15:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:31,539 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:31,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:31,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:15:31,742 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1686950813, now seen corresponding path program 3 times [2022-11-25 18:15:31,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:31,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110908603] [2022-11-25 18:15:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110908603] [2022-11-25 18:15:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110908603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:31,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:31,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229174909] [2022-11-25 18:15:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:31,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:31,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:31,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 219 [2022-11-25 18:15:31,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 701 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:31,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 219 [2022-11-25 18:15:31,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:34,247 INFO L130 PetriNetUnfolder]: 12702/17206 cut-off events. [2022-11-25 18:15:34,248 INFO L131 PetriNetUnfolder]: For 96666/100566 co-relation queries the response was YES. [2022-11-25 18:15:34,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87425 conditions, 17206 events. 12702/17206 cut-off events. For 96666/100566 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 94498 event pairs, 1567 based on Foata normal form. 1990/19028 useless extension candidates. Maximal degree in co-relation 66967. Up to 8034 conditions per place. [2022-11-25 18:15:34,373 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 154 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2022-11-25 18:15:34,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 177 transitions, 1889 flow [2022-11-25 18:15:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2022-11-25 18:15:34,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5296803652968036 [2022-11-25 18:15:34,376 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2022-11-25 18:15:34,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2022-11-25 18:15:34,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:34,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2022-11-25 18:15:34,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:34,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:34,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:34,381 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 701 flow. Second operand 5 states and 580 transitions. [2022-11-25 18:15:34,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 177 transitions, 1889 flow [2022-11-25 18:15:34,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 177 transitions, 1822 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:34,668 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 749 flow [2022-11-25 18:15:34,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=749, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2022-11-25 18:15:34,669 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2022-11-25 18:15:34,669 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 749 flow [2022-11-25 18:15:34,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:34,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:34,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:34,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:15:34,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:34,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2126033989, now seen corresponding path program 4 times [2022-11-25 18:15:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:34,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916568193] [2022-11-25 18:15:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:34,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916568193] [2022-11-25 18:15:34,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916568193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:34,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041067749] [2022-11-25 18:15:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:15:34,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:34,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:34,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:15:34,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:15:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:15:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:34,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:34,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041067749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:34,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:34,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 18:15:34,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188592360] [2022-11-25 18:15:34,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:34,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:35,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:15:35,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 749 flow. Second operand has 10 states, 10 states have (on average 104.1) internal successors, (1041), 10 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:35,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:15:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:37,384 INFO L130 PetriNetUnfolder]: 13290/17960 cut-off events. [2022-11-25 18:15:37,385 INFO L131 PetriNetUnfolder]: For 111919/116104 co-relation queries the response was YES. [2022-11-25 18:15:37,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93119 conditions, 17960 events. 13290/17960 cut-off events. For 111919/116104 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 99497 event pairs, 3654 based on Foata normal form. 2109/19925 useless extension candidates. Maximal degree in co-relation 74852. Up to 9837 conditions per place. [2022-11-25 18:15:37,548 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 159 selfloop transitions, 15 changer transitions 0/181 dead transitions. [2022-11-25 18:15:37,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 181 transitions, 1896 flow [2022-11-25 18:15:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2022-11-25 18:15:37,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5269406392694064 [2022-11-25 18:15:37,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2022-11-25 18:15:37,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2022-11-25 18:15:37,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:37,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2022-11-25 18:15:37,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,557 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 749 flow. Second operand 5 states and 577 transitions. [2022-11-25 18:15:37,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 181 transitions, 1896 flow [2022-11-25 18:15:37,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 181 transitions, 1874 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:37,951 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 774 flow [2022-11-25 18:15:37,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=774, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2022-11-25 18:15:37,952 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2022-11-25 18:15:37,952 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 774 flow [2022-11-25 18:15:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.1) internal successors, (1041), 10 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:37,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:37,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:38,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:15:38,154 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1697261665, now seen corresponding path program 5 times [2022-11-25 18:15:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156634416] [2022-11-25 18:15:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:38,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156634416] [2022-11-25 18:15:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156634416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:38,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:38,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043245585] [2022-11-25 18:15:38,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:38,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:38,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 774 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:38,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:38,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:38,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:40,707 INFO L130 PetriNetUnfolder]: 12640/17096 cut-off events. [2022-11-25 18:15:40,707 INFO L131 PetriNetUnfolder]: For 116491/120385 co-relation queries the response was YES. [2022-11-25 18:15:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90320 conditions, 17096 events. 12640/17096 cut-off events. For 116491/120385 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 93123 event pairs, 3481 based on Foata normal form. 2022/18950 useless extension candidates. Maximal degree in co-relation 71612. Up to 9780 conditions per place. [2022-11-25 18:15:40,856 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 176 selfloop transitions, 22 changer transitions 4/209 dead transitions. [2022-11-25 18:15:40,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 209 transitions, 2218 flow [2022-11-25 18:15:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 692 transitions. [2022-11-25 18:15:40,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5266362252663622 [2022-11-25 18:15:40,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 692 transitions. [2022-11-25 18:15:40,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 692 transitions. [2022-11-25 18:15:40,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:40,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 692 transitions. [2022-11-25 18:15:40,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,866 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,867 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 774 flow. Second operand 6 states and 692 transitions. [2022-11-25 18:15:40,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 209 transitions, 2218 flow [2022-11-25 18:15:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 209 transitions, 2180 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:41,339 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 855 flow [2022-11-25 18:15:41,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=855, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2022-11-25 18:15:41,340 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2022-11-25 18:15:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 855 flow [2022-11-25 18:15:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:41,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:41,341 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:15:41,341 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1971740103, now seen corresponding path program 6 times [2022-11-25 18:15:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524715027] [2022-11-25 18:15:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:41,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524715027] [2022-11-25 18:15:41,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524715027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:41,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:41,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830566784] [2022-11-25 18:15:41,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:41,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:41,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 855 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:41,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:41,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:41,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:43,689 INFO L130 PetriNetUnfolder]: 11932/16126 cut-off events. [2022-11-25 18:15:43,689 INFO L131 PetriNetUnfolder]: For 115921/119607 co-relation queries the response was YES. [2022-11-25 18:15:43,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89128 conditions, 16126 events. 11932/16126 cut-off events. For 115921/119607 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 87335 event pairs, 2855 based on Foata normal form. 1884/17846 useless extension candidates. Maximal degree in co-relation 70700. Up to 8138 conditions per place. [2022-11-25 18:15:43,843 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 157 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2022-11-25 18:15:43,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 2016 flow [2022-11-25 18:15:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 578 transitions. [2022-11-25 18:15:43,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278538812785388 [2022-11-25 18:15:43,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 578 transitions. [2022-11-25 18:15:43,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 578 transitions. [2022-11-25 18:15:43,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:43,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 578 transitions. [2022-11-25 18:15:43,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:43,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:43,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:43,854 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 855 flow. Second operand 5 states and 578 transitions. [2022-11-25 18:15:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 2016 flow [2022-11-25 18:15:44,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1972 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:44,689 INFO L231 Difference]: Finished difference. Result has 108 places, 88 transitions, 868 flow [2022-11-25 18:15:44,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=108, PETRI_TRANSITIONS=88} [2022-11-25 18:15:44,690 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2022-11-25 18:15:44,691 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 88 transitions, 868 flow [2022-11-25 18:15:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:44,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:44,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:15:44,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 200513136, now seen corresponding path program 3 times [2022-11-25 18:15:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:44,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881565658] [2022-11-25 18:15:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:44,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:44,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881565658] [2022-11-25 18:15:44,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881565658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:44,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:44,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493028140] [2022-11-25 18:15:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:44,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:44,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:44,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 88 transitions, 868 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:44,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:44,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:46,762 INFO L130 PetriNetUnfolder]: 10694/14430 cut-off events. [2022-11-25 18:15:46,763 INFO L131 PetriNetUnfolder]: For 123875/129372 co-relation queries the response was YES. [2022-11-25 18:15:46,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80489 conditions, 14430 events. 10694/14430 cut-off events. For 123875/129372 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 79068 event pairs, 2645 based on Foata normal form. 2499/16647 useless extension candidates. Maximal degree in co-relation 66358. Up to 7838 conditions per place. [2022-11-25 18:15:46,906 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 189 selfloop transitions, 22 changer transitions 12/231 dead transitions. [2022-11-25 18:15:46,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 231 transitions, 2672 flow [2022-11-25 18:15:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 696 transitions. [2022-11-25 18:15:46,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5296803652968036 [2022-11-25 18:15:46,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 696 transitions. [2022-11-25 18:15:46,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 696 transitions. [2022-11-25 18:15:46,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:46,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 696 transitions. [2022-11-25 18:15:46,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:46,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:46,917 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:46,917 INFO L175 Difference]: Start difference. First operand has 108 places, 88 transitions, 868 flow. Second operand 6 states and 696 transitions. [2022-11-25 18:15:46,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 231 transitions, 2672 flow [2022-11-25 18:15:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 231 transitions, 2524 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:47,765 INFO L231 Difference]: Finished difference. Result has 112 places, 92 transitions, 938 flow [2022-11-25 18:15:47,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=938, PETRI_PLACES=112, PETRI_TRANSITIONS=92} [2022-11-25 18:15:47,766 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 74 predicate places. [2022-11-25 18:15:47,766 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 92 transitions, 938 flow [2022-11-25 18:15:47,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:47,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:47,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:47,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:15:47,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 798710660, now seen corresponding path program 4 times [2022-11-25 18:15:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:47,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676069174] [2022-11-25 18:15:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:47,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676069174] [2022-11-25 18:15:47,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676069174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:47,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:47,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:15:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389215] [2022-11-25 18:15:47,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:47,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:47,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 219 [2022-11-25 18:15:47,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 92 transitions, 938 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:47,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:47,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 219 [2022-11-25 18:15:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:49,750 INFO L130 PetriNetUnfolder]: 9832/13238 cut-off events. [2022-11-25 18:15:49,750 INFO L131 PetriNetUnfolder]: For 114368/119662 co-relation queries the response was YES. [2022-11-25 18:15:49,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75838 conditions, 13238 events. 9832/13238 cut-off events. For 114368/119662 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 71887 event pairs, 2080 based on Foata normal form. 2266/15294 useless extension candidates. Maximal degree in co-relation 65218. Up to 6158 conditions per place. [2022-11-25 18:15:49,882 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 175 selfloop transitions, 19 changer transitions 0/202 dead transitions. [2022-11-25 18:15:49,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 202 transitions, 2311 flow [2022-11-25 18:15:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:15:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:15:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2022-11-25 18:15:49,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5315068493150685 [2022-11-25 18:15:49,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2022-11-25 18:15:49,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2022-11-25 18:15:49,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:49,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2022-11-25 18:15:49,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,891 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:49,891 INFO L175 Difference]: Start difference. First operand has 112 places, 92 transitions, 938 flow. Second operand 5 states and 582 transitions. [2022-11-25 18:15:49,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 202 transitions, 2311 flow [2022-11-25 18:15:50,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 202 transitions, 2269 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:50,345 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 954 flow [2022-11-25 18:15:50,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=954, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2022-11-25 18:15:50,346 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2022-11-25 18:15:50,346 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 954 flow [2022-11-25 18:15:50,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:50,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:50,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:50,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:15:50,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1185783206, now seen corresponding path program 1 times [2022-11-25 18:15:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:50,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961286250] [2022-11-25 18:15:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:15:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961286250] [2022-11-25 18:15:50,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961286250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:50,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:50,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:15:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417360172] [2022-11-25 18:15:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:50,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:50,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 219 [2022-11-25 18:15:50,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 93 transitions, 954 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:50,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:50,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 219 [2022-11-25 18:15:50,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:51,717 INFO L130 PetriNetUnfolder]: 5810/8042 cut-off events. [2022-11-25 18:15:51,718 INFO L131 PetriNetUnfolder]: For 80659/86559 co-relation queries the response was YES. [2022-11-25 18:15:51,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46623 conditions, 8042 events. 5810/8042 cut-off events. For 80659/86559 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 44752 event pairs, 1876 based on Foata normal form. 2587/10375 useless extension candidates. Maximal degree in co-relation 41388. Up to 5607 conditions per place. [2022-11-25 18:15:51,805 INFO L137 encePairwiseOnDemand]: 216/219 looper letters, 78 selfloop transitions, 10 changer transitions 16/118 dead transitions. [2022-11-25 18:15:51,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 1306 flow [2022-11-25 18:15:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2022-11-25 18:15:51,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5692541856925418 [2022-11-25 18:15:51,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2022-11-25 18:15:51,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2022-11-25 18:15:51,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:51,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2022-11-25 18:15:51,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:51,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:51,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:51,812 INFO L175 Difference]: Start difference. First operand has 115 places, 93 transitions, 954 flow. Second operand 3 states and 374 transitions. [2022-11-25 18:15:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 1306 flow [2022-11-25 18:15:52,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 1259 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 18:15:52,012 INFO L231 Difference]: Finished difference. Result has 115 places, 82 transitions, 841 flow [2022-11-25 18:15:52,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=841, PETRI_PLACES=115, PETRI_TRANSITIONS=82} [2022-11-25 18:15:52,014 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2022-11-25 18:15:52,014 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 82 transitions, 841 flow [2022-11-25 18:15:52,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:52,015 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:52,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 18:15:52,015 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash 881455892, now seen corresponding path program 1 times [2022-11-25 18:15:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:52,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101890289] [2022-11-25 18:15:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101890289] [2022-11-25 18:15:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101890289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393574211] [2022-11-25 18:15:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:52,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:52,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:52,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:15:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:15:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:15:52,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393574211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:52,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:52,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 6 [2022-11-25 18:15:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155709166] [2022-11-25 18:15:52,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:15:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:15:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:15:52,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 219 [2022-11-25 18:15:52,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 82 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 112.25) internal successors, (898), 8 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:52,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:52,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 219 [2022-11-25 18:15:52,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:55,144 INFO L130 PetriNetUnfolder]: 10954/15007 cut-off events. [2022-11-25 18:15:55,144 INFO L131 PetriNetUnfolder]: For 112486/121339 co-relation queries the response was YES. [2022-11-25 18:15:55,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80168 conditions, 15007 events. 10954/15007 cut-off events. For 112486/121339 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 83311 event pairs, 848 based on Foata normal form. 4006/18887 useless extension candidates. Maximal degree in co-relation 79287. Up to 7880 conditions per place. [2022-11-25 18:15:55,291 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2022-11-25 18:15:55,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 265 transitions, 2719 flow [2022-11-25 18:15:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:15:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 978 transitions. [2022-11-25 18:15:55,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5582191780821918 [2022-11-25 18:15:55,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 978 transitions. [2022-11-25 18:15:55,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 978 transitions. [2022-11-25 18:15:55,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 978 transitions. [2022-11-25 18:15:55,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.25) internal successors, (978), 8 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:55,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:55,300 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:55,300 INFO L175 Difference]: Start difference. First operand has 115 places, 82 transitions, 841 flow. Second operand 8 states and 978 transitions. [2022-11-25 18:15:55,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 265 transitions, 2719 flow [2022-11-25 18:15:55,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 265 transitions, 2634 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-11-25 18:15:55,681 INFO L231 Difference]: Finished difference. Result has 110 places, 149 transitions, 1794 flow [2022-11-25 18:15:55,681 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1794, PETRI_PLACES=110, PETRI_TRANSITIONS=149} [2022-11-25 18:15:55,681 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2022-11-25 18:15:55,682 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 149 transitions, 1794 flow [2022-11-25 18:15:55,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.25) internal successors, (898), 8 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:55,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:55,682 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:55,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:55,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:55,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1232557652, now seen corresponding path program 2 times [2022-11-25 18:15:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:55,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205487683] [2022-11-25 18:15:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:56,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:56,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205487683] [2022-11-25 18:15:56,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205487683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:56,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976259614] [2022-11-25 18:15:56,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:56,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:56,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:56,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:15:56,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:15:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:56,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:56,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976259614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:56,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:56,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2022-11-25 18:15:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462955914] [2022-11-25 18:15:56,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:56,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:15:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:15:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:15:56,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 219 [2022-11-25 18:15:56,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 149 transitions, 1794 flow. Second operand has 7 states, 7 states have (on average 114.71428571428571) internal successors, (803), 7 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:56,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:56,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 219 [2022-11-25 18:15:56,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:59,936 INFO L130 PetriNetUnfolder]: 16250/22190 cut-off events. [2022-11-25 18:15:59,937 INFO L131 PetriNetUnfolder]: For 188441/200566 co-relation queries the response was YES. [2022-11-25 18:16:00,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127096 conditions, 22190 events. 16250/22190 cut-off events. For 188441/200566 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 127512 event pairs, 3251 based on Foata normal form. 4781/26829 useless extension candidates. Maximal degree in co-relation 111790. Up to 16099 conditions per place. [2022-11-25 18:16:00,156 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 229 selfloop transitions, 79 changer transitions 5/327 dead transitions. [2022-11-25 18:16:00,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 327 transitions, 3969 flow [2022-11-25 18:16:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:16:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:16:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 880 transitions. [2022-11-25 18:16:00,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5740378343118069 [2022-11-25 18:16:00,158 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 880 transitions. [2022-11-25 18:16:00,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 880 transitions. [2022-11-25 18:16:00,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:00,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 880 transitions. [2022-11-25 18:16:00,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.71428571428571) internal successors, (880), 7 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:00,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:00,163 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:00,163 INFO L175 Difference]: Start difference. First operand has 110 places, 149 transitions, 1794 flow. Second operand 7 states and 880 transitions. [2022-11-25 18:16:00,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 327 transitions, 3969 flow [2022-11-25 18:16:01,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 327 transitions, 3740 flow, removed 111 selfloop flow, removed 1 redundant places. [2022-11-25 18:16:01,151 INFO L231 Difference]: Finished difference. Result has 118 places, 221 transitions, 2788 flow [2022-11-25 18:16:01,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=118, PETRI_TRANSITIONS=221} [2022-11-25 18:16:01,151 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2022-11-25 18:16:01,152 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 221 transitions, 2788 flow [2022-11-25 18:16:01,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.71428571428571) internal successors, (803), 7 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:01,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:01,152 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:01,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:01,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 18:16:01,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:16:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1152240910, now seen corresponding path program 3 times [2022-11-25 18:16:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414619222] [2022-11-25 18:16:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:01,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414619222] [2022-11-25 18:16:01,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414619222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278874404] [2022-11-25 18:16:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:16:01,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:01,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:01,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:16:01,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:16:01,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:16:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:01,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:01,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278874404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:01,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:01,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 18:16:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290490754] [2022-11-25 18:16:01,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:16:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:16:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:16:01,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:16:01,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 221 transitions, 2788 flow. Second operand has 11 states, 11 states have (on average 103.9090909090909) internal successors, (1143), 11 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:01,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:01,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:16:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:06,919 INFO L130 PetriNetUnfolder]: 24015/32855 cut-off events. [2022-11-25 18:16:06,920 INFO L131 PetriNetUnfolder]: For 284371/299097 co-relation queries the response was YES. [2022-11-25 18:16:07,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187938 conditions, 32855 events. 24015/32855 cut-off events. For 284371/299097 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 198164 event pairs, 4613 based on Foata normal form. 5778/38523 useless extension candidates. Maximal degree in co-relation 171952. Up to 17582 conditions per place. [2022-11-25 18:16:07,236 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 418 selfloop transitions, 39 changer transitions 0/465 dead transitions. [2022-11-25 18:16:07,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 465 transitions, 6323 flow [2022-11-25 18:16:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:16:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:16:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 807 transitions. [2022-11-25 18:16:07,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5264187866927593 [2022-11-25 18:16:07,238 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 807 transitions. [2022-11-25 18:16:07,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 807 transitions. [2022-11-25 18:16:07,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:07,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 807 transitions. [2022-11-25 18:16:07,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:07,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:07,242 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:07,243 INFO L175 Difference]: Start difference. First operand has 118 places, 221 transitions, 2788 flow. Second operand 7 states and 807 transitions. [2022-11-25 18:16:07,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 465 transitions, 6323 flow [2022-11-25 18:16:09,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 465 transitions, 5811 flow, removed 256 selfloop flow, removed 0 redundant places. [2022-11-25 18:16:09,161 INFO L231 Difference]: Finished difference. Result has 128 places, 244 transitions, 2860 flow [2022-11-25 18:16:09,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2860, PETRI_PLACES=128, PETRI_TRANSITIONS=244} [2022-11-25 18:16:09,162 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 90 predicate places. [2022-11-25 18:16:09,162 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 244 transitions, 2860 flow [2022-11-25 18:16:09,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 103.9090909090909) internal successors, (1143), 11 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:09,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:09,163 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:09,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:09,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:09,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:16:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash -789873047, now seen corresponding path program 4 times [2022-11-25 18:16:09,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421489624] [2022-11-25 18:16:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:09,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421489624] [2022-11-25 18:16:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421489624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:09,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440417413] [2022-11-25 18:16:09,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:16:09,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:09,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:09,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868ba951-6c36-4d3c-a6d7-cbc777e4ce27/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:16:09,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:16:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:16:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:09,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:09,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440417413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:09,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:09,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 18:16:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574177920] [2022-11-25 18:16:09,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:16:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:16:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:16:09,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2022-11-25 18:16:09,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 244 transitions, 2860 flow. Second operand has 11 states, 11 states have (on average 103.0) internal successors, (1133), 11 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:09,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:09,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2022-11-25 18:16:09,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand