./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8 --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:17:50,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:17:50,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:17:50,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:17:50,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:17:50,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:17:50,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:17:50,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:17:50,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:17:50,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:17:50,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:17:50,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:17:50,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:17:50,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:17:50,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:17:50,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:17:50,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:17:50,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:17:50,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:17:50,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:17:50,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:17:50,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:17:50,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:17:50,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:17:50,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:17:50,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:17:50,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:17:50,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:17:50,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:17:50,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:17:50,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:17:50,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:17:50,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:17:50,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:17:50,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:17:50,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:17:50,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:17:50,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:17:50,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:17:50,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:17:50,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:17:50,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:17:50,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:17:50,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:17:50,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:17:50,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:17:50,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:17:50,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:17:50,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:17:50,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:17:50,917 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:17:50,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:17:50,917 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:17:50,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:17:50,918 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:17:50,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:17:50,919 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:17:50,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:17:50,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:17:50,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:17:50,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:17:50,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:17:50,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:17:50,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:17:50,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:17:50,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:17:50,921 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:17:50,922 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_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-12-13 19:17:51,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:17:51,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:17:51,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:17:51,128 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:17:51,129 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:17:51,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-12-13 19:17:53,777 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:17:53,918 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:17:53,919 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-12-13 19:17:53,924 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/data/830b99a1d/e7222975029d44a4ab4e1e78ed6eee3b/FLAGe89071d84 [2022-12-13 19:17:53,935 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/data/830b99a1d/e7222975029d44a4ab4e1e78ed6eee3b [2022-12-13 19:17:53,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:17:53,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:17:53,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:17:53,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:17:53,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:17:53,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:17:53" (1/1) ... [2022-12-13 19:17:53,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5081baf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:53, skipping insertion in model container [2022-12-13 19:17:53,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:17:53" (1/1) ... [2022-12-13 19:17:53,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:17:53,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:17:54,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:17:54,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:17:54,121 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:17:54,122 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:17:54,128 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_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-12-13 19:17:54,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:17:54,140 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:17:54,149 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:17:54,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:17:54,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:17:54,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:17:54,153 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_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-12-13 19:17:54,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:17:54,164 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:17:54,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54 WrapperNode [2022-12-13 19:17:54,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:17:54,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:17:54,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:17:54,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:17:54,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,188 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-12-13 19:17:54,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:17:54,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:17:54,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:17:54,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:17:54,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,203 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:17:54,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:17:54,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:17:54,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:17:54,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (1/1) ... [2022-12-13 19:17:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:17:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:54,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:17:54,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:17:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:17:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:17:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:17:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:17:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:17:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:17:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:17:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:17:54,267 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:17:54,344 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:17:54,345 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:17:54,467 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:17:54,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:17:54,498 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:17:54,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:17:54 BoogieIcfgContainer [2022-12-13 19:17:54,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:17:54,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:17:54,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:17:54,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:17:54,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:17:53" (1/3) ... [2022-12-13 19:17:54,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1475db02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:17:54, skipping insertion in model container [2022-12-13 19:17:54,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:17:54" (2/3) ... [2022-12-13 19:17:54,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1475db02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:17:54, skipping insertion in model container [2022-12-13 19:17:54,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:17:54" (3/3) ... [2022-12-13 19:17:54,507 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-12-13 19:17:54,513 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:17:54,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:17:54,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:17:54,521 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:17:54,568 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:17:54,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-12-13 19:17:54,640 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2022-12-13 19:17:54,640 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:17:54,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-13 19:17:54,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-12-13 19:17:54,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-12-13 19:17:54,659 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:17:54,669 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 144 flow [2022-12-13 19:17:54,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 144 flow [2022-12-13 19:17:54,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 144 flow [2022-12-13 19:17:54,698 INFO L130 PetriNetUnfolder]: 5/66 cut-off events. [2022-12-13 19:17:54,699 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:17:54,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 5/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-13 19:17:54,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-13 19:17:56,062 INFO L134 LiptonReduction]: Checked pairs total: 536 [2022-12-13 19:17:56,062 INFO L136 LiptonReduction]: Total number of compositions: 56 [2022-12-13 19:17:56,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:17:56,082 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;@5c90fe5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:17:56,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 19:17:56,086 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 19:17:56,086 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:17:56,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:56,086 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:56,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1465997927, now seen corresponding path program 1 times [2022-12-13 19:17:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:56,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332876665] [2022-12-13 19:17:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:56,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332876665] [2022-12-13 19:17:56,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332876665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:56,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:56,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:17:56,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136123296] [2022-12-13 19:17:56,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:17:56,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:17:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:17:56,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2022-12-13 19:17:56,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:56,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2022-12-13 19:17:56,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:56,447 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-12-13 19:17:56,447 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 19:17:56,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 265 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2022-12-13 19:17:56,448 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-12-13 19:17:56,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2022-12-13 19:17:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:17:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:17:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-12-13 19:17:56,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.556390977443609 [2022-12-13 19:17:56,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-12-13 19:17:56,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-12-13 19:17:56,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:56,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-12-13 19:17:56,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,468 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 222 transitions. [2022-12-13 19:17:56,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2022-12-13 19:17:56,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:17:56,471 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2022-12-13 19:17:56,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2022-12-13 19:17:56,475 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-12-13 19:17:56,475 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2022-12-13 19:17:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:56,476 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:56,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:17:56,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1644984013, now seen corresponding path program 1 times [2022-12-13 19:17:56,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:56,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868427165] [2022-12-13 19:17:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:56,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:56,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:56,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868427165] [2022-12-13 19:17:56,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868427165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:56,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:56,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:56,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931358557] [2022-12-13 19:17:56,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:56,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2022-12-13 19:17:56,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:56,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2022-12-13 19:17:56,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:56,651 INFO L130 PetriNetUnfolder]: 76/153 cut-off events. [2022-12-13 19:17:56,651 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 19:17:56,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 153 events. 76/153 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 470 event pairs, 24 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 183. Up to 78 conditions per place. [2022-12-13 19:17:56,653 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2022-12-13 19:17:56,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 191 flow [2022-12-13 19:17:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2022-12-13 19:17:56,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4992481203007519 [2022-12-13 19:17:56,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 332 transitions. [2022-12-13 19:17:56,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 332 transitions. [2022-12-13 19:17:56,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:56,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 332 transitions. [2022-12-13 19:17:56,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.4) internal successors, (332), 5 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,659 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 332 transitions. [2022-12-13 19:17:56,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 191 flow [2022-12-13 19:17:56,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:17:56,660 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 70 flow [2022-12-13 19:17:56,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-12-13 19:17:56,661 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-13 19:17:56,661 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 70 flow [2022-12-13 19:17:56,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:56,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:56,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:17:56,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash -754432681, now seen corresponding path program 2 times [2022-12-13 19:17:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:56,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709633949] [2022-12-13 19:17:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:56,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:56,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709633949] [2022-12-13 19:17:56,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709633949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492657697] [2022-12-13 19:17:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:56,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:56,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:56,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:17:56,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:17:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:56,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492657697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:56,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:56,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 19:17:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681016030] [2022-12-13 19:17:56,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:56,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:17:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:17:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:17:56,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:17:56,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:56,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:17:56,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:56,998 INFO L130 PetriNetUnfolder]: 82/158 cut-off events. [2022-12-13 19:17:56,999 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-12-13 19:17:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 158 events. 82/158 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 489 event pairs, 14 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 143. Up to 90 conditions per place. [2022-12-13 19:17:57,001 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 29 selfloop transitions, 4 changer transitions 5/38 dead transitions. [2022-12-13 19:17:57,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 212 flow [2022-12-13 19:17:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 322 transitions. [2022-12-13 19:17:57,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2022-12-13 19:17:57,003 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 322 transitions. [2022-12-13 19:17:57,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 322 transitions. [2022-12-13 19:17:57,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:57,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 322 transitions. [2022-12-13 19:17:57,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,005 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 70 flow. Second operand 5 states and 322 transitions. [2022-12-13 19:17:57,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 212 flow [2022-12-13 19:17:57,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:57,007 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 91 flow [2022-12-13 19:17:57,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-13 19:17:57,007 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-12-13 19:17:57,008 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 91 flow [2022-12-13 19:17:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:57,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:57,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:17:57,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 19:17:57,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1204787797, now seen corresponding path program 3 times [2022-12-13 19:17:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916435376] [2022-12-13 19:17:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916435376] [2022-12-13 19:17:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916435376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:57,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:57,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3427054] [2022-12-13 19:17:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:57,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-12-13 19:17:57,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:57,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-12-13 19:17:57,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:57,479 INFO L130 PetriNetUnfolder]: 90/179 cut-off events. [2022-12-13 19:17:57,479 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-13 19:17:57,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 179 events. 90/179 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 577 event pairs, 32 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 308. Up to 84 conditions per place. [2022-12-13 19:17:57,482 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 25 selfloop transitions, 6 changer transitions 8/39 dead transitions. [2022-12-13 19:17:57,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 241 flow [2022-12-13 19:17:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2022-12-13 19:17:57,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49022556390977445 [2022-12-13 19:17:57,483 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 326 transitions. [2022-12-13 19:17:57,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 326 transitions. [2022-12-13 19:17:57,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:57,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 326 transitions. [2022-12-13 19:17:57,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,486 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,486 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 91 flow. Second operand 5 states and 326 transitions. [2022-12-13 19:17:57,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 241 flow [2022-12-13 19:17:57,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:57,488 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 129 flow [2022-12-13 19:17:57,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2022-12-13 19:17:57,488 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2022-12-13 19:17:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 129 flow [2022-12-13 19:17:57,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:57,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:17:57,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash 258037985, now seen corresponding path program 4 times [2022-12-13 19:17:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:57,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107115675] [2022-12-13 19:17:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107115675] [2022-12-13 19:17:57,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107115675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:57,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:57,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118216598] [2022-12-13 19:17:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:57,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:57,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-12-13 19:17:57,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:57,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-12-13 19:17:57,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:57,620 INFO L130 PetriNetUnfolder]: 81/159 cut-off events. [2022-12-13 19:17:57,621 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-12-13 19:17:57,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 159 events. 81/159 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 486 event pairs, 34 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2022-12-13 19:17:57,622 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 22 selfloop transitions, 6 changer transitions 15/43 dead transitions. [2022-12-13 19:17:57,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 306 flow [2022-12-13 19:17:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:17:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:17:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 386 transitions. [2022-12-13 19:17:57,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48370927318295737 [2022-12-13 19:17:57,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 386 transitions. [2022-12-13 19:17:57,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 386 transitions. [2022-12-13 19:17:57,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:57,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 386 transitions. [2022-12-13 19:17:57,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-12-13 19:17:57,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-12-13 19:17:57,625 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 129 flow. Second operand 6 states and 386 transitions. [2022-12-13 19:17:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 306 flow [2022-12-13 19:17:57,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 292 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:57,627 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 164 flow [2022-12-13 19:17:57,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2022-12-13 19:17:57,628 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-13 19:17:57,628 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 164 flow [2022-12-13 19:17:57,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:57,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:57,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:17:57,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:57,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1538208607, now seen corresponding path program 5 times [2022-12-13 19:17:57,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:57,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955078664] [2022-12-13 19:17:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:57,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:57,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955078664] [2022-12-13 19:17:57,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955078664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721190704] [2022-12-13 19:17:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:17:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:57,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:57,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:17:57,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:17:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:57,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721190704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:57,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 19:17:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255431779] [2022-12-13 19:17:57,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:57,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:17:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:17:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:17:57,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:17:57,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:57,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:17:57,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:57,928 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2022-12-13 19:17:57,929 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2022-12-13 19:17:57,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 156 events. 83/156 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 429 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 468. Up to 100 conditions per place. [2022-12-13 19:17:57,930 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2022-12-13 19:17:57,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 365 flow [2022-12-13 19:17:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:17:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:17:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 502 transitions. [2022-12-13 19:17:57,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4718045112781955 [2022-12-13 19:17:57,932 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 502 transitions. [2022-12-13 19:17:57,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 502 transitions. [2022-12-13 19:17:57,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:57,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 502 transitions. [2022-12-13 19:17:57,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 133.0) internal successors, (1197), 9 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,934 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 133.0) internal successors, (1197), 9 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,934 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 164 flow. Second operand 8 states and 502 transitions. [2022-12-13 19:17:57,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 365 flow [2022-12-13 19:17:57,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 343 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 19:17:57,936 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 197 flow [2022-12-13 19:17:57,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2022-12-13 19:17:57,937 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2022-12-13 19:17:57,937 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 197 flow [2022-12-13 19:17:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:57,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:57,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:17:58,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:58,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1398946777, now seen corresponding path program 6 times [2022-12-13 19:17:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:58,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393786054] [2022-12-13 19:17:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:58,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:58,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393786054] [2022-12-13 19:17:58,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393786054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992206263] [2022-12-13 19:17:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:17:58,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:58,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:58,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:58,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:17:58,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 19:17:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:17:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992206263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:58,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:58,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 19:17:58,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546527534] [2022-12-13 19:17:58,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:58,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:17:58,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:17:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:17:58,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:17:58,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 59.4) internal successors, (594), 10 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:58,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:17:58,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:58,547 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2022-12-13 19:17:58,547 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2022-12-13 19:17:58,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 140 events. 75/140 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 367 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 509. Up to 87 conditions per place. [2022-12-13 19:17:58,549 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2022-12-13 19:17:58,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 317 flow [2022-12-13 19:17:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-12-13 19:17:58,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4766917293233083 [2022-12-13 19:17:58,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-12-13 19:17:58,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-12-13 19:17:58,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:58,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-12-13 19:17:58,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,553 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 197 flow. Second operand 5 states and 317 transitions. [2022-12-13 19:17:58,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 317 flow [2022-12-13 19:17:58,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 293 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-13 19:17:58,555 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 177 flow [2022-12-13 19:17:58,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2022-12-13 19:17:58,556 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2022-12-13 19:17:58,556 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 177 flow [2022-12-13 19:17:58,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.4) internal successors, (594), 10 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:58,556 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:58,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:17:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:58,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1186323630, now seen corresponding path program 1 times [2022-12-13 19:17:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982374171] [2022-12-13 19:17:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982374171] [2022-12-13 19:17:58,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982374171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073817452] [2022-12-13 19:17:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:58,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:17:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:17:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:58,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073817452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:58,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:58,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-12-13 19:17:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550397321] [2022-12-13 19:17:58,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:17:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:17:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:17:58,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2022-12-13 19:17:58,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:58,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:58,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2022-12-13 19:17:58,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:59,043 INFO L130 PetriNetUnfolder]: 118/222 cut-off events. [2022-12-13 19:17:59,043 INFO L131 PetriNetUnfolder]: For 669/689 co-relation queries the response was YES. [2022-12-13 19:17:59,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 222 events. 118/222 cut-off events. For 669/689 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 760 event pairs, 12 based on Foata normal form. 19/235 useless extension candidates. Maximal degree in co-relation 759. Up to 111 conditions per place. [2022-12-13 19:17:59,045 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-12-13 19:17:59,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 380 flow [2022-12-13 19:17:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:17:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:17:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-12-13 19:17:59,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5620300751879699 [2022-12-13 19:17:59,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-12-13 19:17:59,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-12-13 19:17:59,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:59,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-12-13 19:17:59,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,048 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 177 flow. Second operand 4 states and 299 transitions. [2022-12-13 19:17:59,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 380 flow [2022-12-13 19:17:59,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 323 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-12-13 19:17:59,051 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 238 flow [2022-12-13 19:17:59,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-12-13 19:17:59,051 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-13 19:17:59,051 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 238 flow [2022-12-13 19:17:59,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:59,052 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:59,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:17:59,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:59,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:17:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1887532596, now seen corresponding path program 2 times [2022-12-13 19:17:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:59,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946427217] [2022-12-13 19:17:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946427217] [2022-12-13 19:17:59,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946427217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:59,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093544286] [2022-12-13 19:17:59,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:59,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:59,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:59,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:59,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:17:59,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:59,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:17:59,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:59,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:59,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093544286] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:59,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:59,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 19:17:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914856677] [2022-12-13 19:17:59,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:17:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:17:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:17:59,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:17:59,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:59,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:17:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:59,825 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2022-12-13 19:17:59,825 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2022-12-13 19:17:59,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 464 events. 236/464 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1993 event pairs, 3 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 666. Up to 157 conditions per place. [2022-12-13 19:17:59,827 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2022-12-13 19:17:59,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 133 transitions, 1027 flow [2022-12-13 19:17:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:17:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:17:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1250 transitions. [2022-12-13 19:17:59,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4699248120300752 [2022-12-13 19:17:59,833 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1250 transitions. [2022-12-13 19:17:59,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1250 transitions. [2022-12-13 19:17:59,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:59,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1250 transitions. [2022-12-13 19:17:59,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 62.5) internal successors, (1250), 20 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 133.0) internal successors, (2793), 21 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,839 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 133.0) internal successors, (2793), 21 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,839 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 238 flow. Second operand 20 states and 1250 transitions. [2022-12-13 19:17:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 133 transitions, 1027 flow [2022-12-13 19:17:59,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 133 transitions, 993 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-12-13 19:17:59,842 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 673 flow [2022-12-13 19:17:59,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2022-12-13 19:17:59,843 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2022-12-13 19:17:59,843 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 673 flow [2022-12-13 19:17:59,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:59,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:59,844 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:59,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:18:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:18:00,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 146092754, now seen corresponding path program 3 times [2022-12-13 19:18:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:00,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275060922] [2022-12-13 19:18:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275060922] [2022-12-13 19:18:00,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275060922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246456307] [2022-12-13 19:18:00,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:18:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:00,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:00,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:18:00,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:18:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:18:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246456307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:00,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:00,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 19:18:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115172197] [2022-12-13 19:18:00,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:00,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:18:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:18:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:18:00,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:00,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 59.09090909090909) internal successors, (650), 11 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:00,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:00,438 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2022-12-13 19:18:00,438 INFO L131 PetriNetUnfolder]: For 1883/1883 co-relation queries the response was YES. [2022-12-13 19:18:00,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 505 events. 246/505 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2344 event pairs, 21 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2005. Up to 346 conditions per place. [2022-12-13 19:18:00,441 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2022-12-13 19:18:00,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 115 transitions, 1208 flow [2022-12-13 19:18:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:18:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:18:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 447 transitions. [2022-12-13 19:18:00,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48012889366272826 [2022-12-13 19:18:00,443 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 447 transitions. [2022-12-13 19:18:00,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 447 transitions. [2022-12-13 19:18:00,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:00,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 447 transitions. [2022-12-13 19:18:00,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,445 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,445 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 673 flow. Second operand 7 states and 447 transitions. [2022-12-13 19:18:00,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 115 transitions, 1208 flow [2022-12-13 19:18:00,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 953 flow, removed 112 selfloop flow, removed 6 redundant places. [2022-12-13 19:18:00,454 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 661 flow [2022-12-13 19:18:00,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2022-12-13 19:18:00,455 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2022-12-13 19:18:00,455 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 661 flow [2022-12-13 19:18:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.09090909090909) internal successors, (650), 11 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:00,456 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:00,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:18:00,657 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1862080026, now seen corresponding path program 4 times [2022-12-13 19:18:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419668414] [2022-12-13 19:18:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419668414] [2022-12-13 19:18:00,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419668414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190736947] [2022-12-13 19:18:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:00,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:00,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:18:00,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:18:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:00,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190736947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:00,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:00,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 19:18:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161434600] [2022-12-13 19:18:00,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:18:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:18:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:18:00,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:00,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 661 flow. Second operand has 13 states, 13 states have (on average 59.30769230769231) internal successors, (771), 13 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:00,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:00,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:00,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:01,104 INFO L130 PetriNetUnfolder]: 315/634 cut-off events. [2022-12-13 19:18:01,104 INFO L131 PetriNetUnfolder]: For 2097/2097 co-relation queries the response was YES. [2022-12-13 19:18:01,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626 conditions, 634 events. 315/634 cut-off events. For 2097/2097 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3152 event pairs, 19 based on Foata normal form. 38/672 useless extension candidates. Maximal degree in co-relation 1961. Up to 476 conditions per place. [2022-12-13 19:18:01,107 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 98 selfloop transitions, 41 changer transitions 0/139 dead transitions. [2022-12-13 19:18:01,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 1274 flow [2022-12-13 19:18:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:18:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:18:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 696 transitions. [2022-12-13 19:18:01,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47573479152426523 [2022-12-13 19:18:01,109 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 696 transitions. [2022-12-13 19:18:01,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 696 transitions. [2022-12-13 19:18:01,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:01,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 696 transitions. [2022-12-13 19:18:01,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 63.27272727272727) internal successors, (696), 11 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) [2022-12-13 19:18:01,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,112 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,112 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 661 flow. Second operand 11 states and 696 transitions. [2022-12-13 19:18:01,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 1274 flow [2022-12-13 19:18:01,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 1239 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-12-13 19:18:01,120 INFO L231 Difference]: Finished difference. Result has 81 places, 105 transitions, 998 flow [2022-12-13 19:18:01,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=998, PETRI_PLACES=81, PETRI_TRANSITIONS=105} [2022-12-13 19:18:01,121 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2022-12-13 19:18:01,121 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 105 transitions, 998 flow [2022-12-13 19:18:01,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.30769230769231) internal successors, (771), 13 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:01,121 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:01,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:18:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:01,322 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -501530926, now seen corresponding path program 5 times [2022-12-13 19:18:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567534471] [2022-12-13 19:18:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567534471] [2022-12-13 19:18:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567534471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762428307] [2022-12-13 19:18:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:18:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:01,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:01,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:18:01,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:18:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:18:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:01,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762428307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:01,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:01,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 19:18:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843933928] [2022-12-13 19:18:01,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:18:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:18:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:18:01,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:01,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 105 transitions, 998 flow. Second operand has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:01,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:01,839 INFO L130 PetriNetUnfolder]: 294/587 cut-off events. [2022-12-13 19:18:01,839 INFO L131 PetriNetUnfolder]: For 2828/2828 co-relation queries the response was YES. [2022-12-13 19:18:01,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 587 events. 294/587 cut-off events. For 2828/2828 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2852 event pairs, 11 based on Foata normal form. 34/621 useless extension candidates. Maximal degree in co-relation 2522. Up to 220 conditions per place. [2022-12-13 19:18:01,844 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 79 selfloop transitions, 64 changer transitions 7/150 dead transitions. [2022-12-13 19:18:01,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1516 flow [2022-12-13 19:18:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:18:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:18:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 886 transitions. [2022-12-13 19:18:01,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4758324382384533 [2022-12-13 19:18:01,847 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 886 transitions. [2022-12-13 19:18:01,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 886 transitions. [2022-12-13 19:18:01,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:01,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 886 transitions. [2022-12-13 19:18:01,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 63.285714285714285) internal successors, (886), 14 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 133.0) internal successors, (1995), 15 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,853 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 133.0) internal successors, (1995), 15 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,853 INFO L175 Difference]: Start difference. First operand has 81 places, 105 transitions, 998 flow. Second operand 14 states and 886 transitions. [2022-12-13 19:18:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1516 flow [2022-12-13 19:18:01,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 150 transitions, 1382 flow, removed 51 selfloop flow, removed 8 redundant places. [2022-12-13 19:18:01,870 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 1053 flow [2022-12-13 19:18:01,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1053, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2022-12-13 19:18:01,871 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2022-12-13 19:18:01,871 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 1053 flow [2022-12-13 19:18:01,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:01,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:01,872 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:01,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:18:02,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 19:18:02,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1776861702, now seen corresponding path program 6 times [2022-12-13 19:18:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406509914] [2022-12-13 19:18:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:02,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406509914] [2022-12-13 19:18:02,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406509914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228393983] [2022-12-13 19:18:02,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:18:02,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:02,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:02,145 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:02,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:18:02,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 19:18:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:18:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:02,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:02,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228393983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:02,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:02,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 19:18:02,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027454981] [2022-12-13 19:18:02,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:02,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:18:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:18:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:18:02,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:02,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 1053 flow. Second operand has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:02,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:02,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:02,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:02,604 INFO L130 PetriNetUnfolder]: 356/718 cut-off events. [2022-12-13 19:18:02,605 INFO L131 PetriNetUnfolder]: For 3317/3317 co-relation queries the response was YES. [2022-12-13 19:18:02,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 718 events. 356/718 cut-off events. For 3317/3317 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3668 event pairs, 81 based on Foata normal form. 42/760 useless extension candidates. Maximal degree in co-relation 3151. Up to 432 conditions per place. [2022-12-13 19:18:02,611 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 126 selfloop transitions, 47 changer transitions 3/176 dead transitions. [2022-12-13 19:18:02,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 176 transitions, 1903 flow [2022-12-13 19:18:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:18:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:18:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 832 transitions. [2022-12-13 19:18:02,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2022-12-13 19:18:02,613 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 832 transitions. [2022-12-13 19:18:02,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 832 transitions. [2022-12-13 19:18:02,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:02,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 832 transitions. [2022-12-13 19:18:02,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:02,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 133.0) internal successors, (1862), 14 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:02,625 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 133.0) internal successors, (1862), 14 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:02,625 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 1053 flow. Second operand 13 states and 832 transitions. [2022-12-13 19:18:02,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 176 transitions, 1903 flow [2022-12-13 19:18:02,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 176 transitions, 1839 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-12-13 19:18:02,639 INFO L231 Difference]: Finished difference. Result has 100 places, 125 transitions, 1468 flow [2022-12-13 19:18:02,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1468, PETRI_PLACES=100, PETRI_TRANSITIONS=125} [2022-12-13 19:18:02,640 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-12-13 19:18:02,640 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 125 transitions, 1468 flow [2022-12-13 19:18:02,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:02,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:02,640 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:02,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:18:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:02,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1912638974, now seen corresponding path program 7 times [2022-12-13 19:18:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758690214] [2022-12-13 19:18:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758690214] [2022-12-13 19:18:03,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758690214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430871393] [2022-12-13 19:18:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:18:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:03,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:03,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:18:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:18:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:03,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:03,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430871393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:03,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:03,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 19:18:03,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592601028] [2022-12-13 19:18:03,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:18:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:18:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:18:03,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:03,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 125 transitions, 1468 flow. Second operand has 13 states, 13 states have (on average 58.92307692307692) internal successors, (766), 13 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:03,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:03,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:03,421 INFO L130 PetriNetUnfolder]: 371/743 cut-off events. [2022-12-13 19:18:03,421 INFO L131 PetriNetUnfolder]: For 5806/5806 co-relation queries the response was YES. [2022-12-13 19:18:03,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 743 events. 371/743 cut-off events. For 5806/5806 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3809 event pairs, 39 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 3754. Up to 216 conditions per place. [2022-12-13 19:18:03,425 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 95 selfloop transitions, 80 changer transitions 8/183 dead transitions. [2022-12-13 19:18:03,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 2266 flow [2022-12-13 19:18:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:18:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:18:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1055 transitions. [2022-12-13 19:18:03,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666076957098629 [2022-12-13 19:18:03,428 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1055 transitions. [2022-12-13 19:18:03,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1055 transitions. [2022-12-13 19:18:03,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:03,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1055 transitions. [2022-12-13 19:18:03,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.05882352941177) internal successors, (1055), 17 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 133.0) internal successors, (2394), 18 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,432 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 133.0) internal successors, (2394), 18 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,432 INFO L175 Difference]: Start difference. First operand has 100 places, 125 transitions, 1468 flow. Second operand 17 states and 1055 transitions. [2022-12-13 19:18:03,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 2266 flow [2022-12-13 19:18:03,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 2018 flow, removed 113 selfloop flow, removed 3 redundant places. [2022-12-13 19:18:03,452 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1617 flow [2022-12-13 19:18:03,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1617, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2022-12-13 19:18:03,453 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 98 predicate places. [2022-12-13 19:18:03,453 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1617 flow [2022-12-13 19:18:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.92307692307692) internal successors, (766), 13 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:03,453 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:03,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:18:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:18:03,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash -927930259, now seen corresponding path program 8 times [2022-12-13 19:18:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35661982] [2022-12-13 19:18:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35661982] [2022-12-13 19:18:03,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35661982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103620999] [2022-12-13 19:18:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:18:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:03,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:18:03,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:18:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:18:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:03,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:03,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103620999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:03,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:03,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-13 19:18:03,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851096823] [2022-12-13 19:18:03,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:18:03,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:18:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:18:03,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2022-12-13 19:18:03,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1617 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:03,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:03,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2022-12-13 19:18:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:04,179 INFO L130 PetriNetUnfolder]: 606/1215 cut-off events. [2022-12-13 19:18:04,179 INFO L131 PetriNetUnfolder]: For 9246/9256 co-relation queries the response was YES. [2022-12-13 19:18:04,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 1215 events. 606/1215 cut-off events. For 9246/9256 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7210 event pairs, 61 based on Foata normal form. 30/1243 useless extension candidates. Maximal degree in co-relation 6636. Up to 578 conditions per place. [2022-12-13 19:18:04,190 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 145 selfloop transitions, 63 changer transitions 50/265 dead transitions. [2022-12-13 19:18:04,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 265 transitions, 3491 flow [2022-12-13 19:18:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:18:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:18:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 376 transitions. [2022-12-13 19:18:04,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5654135338345865 [2022-12-13 19:18:04,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 376 transitions. [2022-12-13 19:18:04,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 376 transitions. [2022-12-13 19:18:04,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:04,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 376 transitions. [2022-12-13 19:18:04,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:04,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:04,194 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:04,194 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1617 flow. Second operand 5 states and 376 transitions. [2022-12-13 19:18:04,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 265 transitions, 3491 flow [2022-12-13 19:18:04,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 265 transitions, 3317 flow, removed 68 selfloop flow, removed 3 redundant places. [2022-12-13 19:18:04,236 INFO L231 Difference]: Finished difference. Result has 121 places, 180 transitions, 2387 flow [2022-12-13 19:18:04,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2387, PETRI_PLACES=121, PETRI_TRANSITIONS=180} [2022-12-13 19:18:04,237 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2022-12-13 19:18:04,237 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 180 transitions, 2387 flow [2022-12-13 19:18:04,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:04,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:04,237 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:04,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:18:04,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:18:04,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash -803702399, now seen corresponding path program 9 times [2022-12-13 19:18:04,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265539526] [2022-12-13 19:18:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:04,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265539526] [2022-12-13 19:18:04,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265539526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147598262] [2022-12-13 19:18:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:18:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:04,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:04,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:18:04,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:18:04,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:04,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:04,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147598262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:04,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:04,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 19:18:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845645699] [2022-12-13 19:18:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:18:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:18:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:18:04,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:04,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 180 transitions, 2387 flow. Second operand has 15 states, 15 states have (on average 58.86666666666667) internal successors, (883), 15 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:04,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:04,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:04,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:05,273 INFO L130 PetriNetUnfolder]: 773/1637 cut-off events. [2022-12-13 19:18:05,273 INFO L131 PetriNetUnfolder]: For 15714/15714 co-relation queries the response was YES. [2022-12-13 19:18:05,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 1637 events. 773/1637 cut-off events. For 15714/15714 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10807 event pairs, 33 based on Foata normal form. 24/1661 useless extension candidates. Maximal degree in co-relation 9743. Up to 346 conditions per place. [2022-12-13 19:18:05,283 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 155 selfloop transitions, 187 changer transitions 21/363 dead transitions. [2022-12-13 19:18:05,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 363 transitions, 4935 flow [2022-12-13 19:18:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 19:18:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 19:18:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2055 transitions. [2022-12-13 19:18:05,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46821599453178403 [2022-12-13 19:18:05,285 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2055 transitions. [2022-12-13 19:18:05,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2055 transitions. [2022-12-13 19:18:05,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:05,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2055 transitions. [2022-12-13 19:18:05,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.27272727272727) internal successors, (2055), 33 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:05,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 133.0) internal successors, (4522), 34 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:05,290 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 133.0) internal successors, (4522), 34 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:05,290 INFO L175 Difference]: Start difference. First operand has 121 places, 180 transitions, 2387 flow. Second operand 33 states and 2055 transitions. [2022-12-13 19:18:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 363 transitions, 4935 flow [2022-12-13 19:18:05,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 363 transitions, 4757 flow, removed 67 selfloop flow, removed 1 redundant places. [2022-12-13 19:18:05,335 INFO L231 Difference]: Finished difference. Result has 165 places, 257 transitions, 4159 flow [2022-12-13 19:18:05,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4159, PETRI_PLACES=165, PETRI_TRANSITIONS=257} [2022-12-13 19:18:05,335 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2022-12-13 19:18:05,335 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 257 transitions, 4159 flow [2022-12-13 19:18:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.86666666666667) internal successors, (883), 15 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:05,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:05,336 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:05,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:18:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:18:05,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1867709011, now seen corresponding path program 10 times [2022-12-13 19:18:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79369221] [2022-12-13 19:18:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79369221] [2022-12-13 19:18:05,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79369221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062459455] [2022-12-13 19:18:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:05,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:05,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:18:05,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:05,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:05,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062459455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:05,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:05,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 19:18:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091745874] [2022-12-13 19:18:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:18:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:18:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:18:05,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:05,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 257 transitions, 4159 flow. Second operand has 14 states, 14 states have (on average 58.857142857142854) internal successors, (824), 14 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:05,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:05,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:05,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:06,276 INFO L130 PetriNetUnfolder]: 895/1851 cut-off events. [2022-12-13 19:18:06,276 INFO L131 PetriNetUnfolder]: For 30691/30691 co-relation queries the response was YES. [2022-12-13 19:18:06,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13353 conditions, 1851 events. 895/1851 cut-off events. For 30691/30691 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12377 event pairs, 91 based on Foata normal form. 36/1887 useless extension candidates. Maximal degree in co-relation 13058. Up to 1436 conditions per place. [2022-12-13 19:18:06,289 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 274 selfloop transitions, 60 changer transitions 25/359 dead transitions. [2022-12-13 19:18:06,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 359 transitions, 6344 flow [2022-12-13 19:18:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:18:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:18:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2022-12-13 19:18:06,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47869674185463656 [2022-12-13 19:18:06,290 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 573 transitions. [2022-12-13 19:18:06,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 573 transitions. [2022-12-13 19:18:06,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:06,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 573 transitions. [2022-12-13 19:18:06,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:06,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 133.0) internal successors, (1330), 10 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:06,292 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 133.0) internal successors, (1330), 10 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:06,292 INFO L175 Difference]: Start difference. First operand has 165 places, 257 transitions, 4159 flow. Second operand 9 states and 573 transitions. [2022-12-13 19:18:06,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 359 transitions, 6344 flow [2022-12-13 19:18:06,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 359 transitions, 5274 flow, removed 444 selfloop flow, removed 12 redundant places. [2022-12-13 19:18:06,465 INFO L231 Difference]: Finished difference. Result has 163 places, 294 transitions, 4221 flow [2022-12-13 19:18:06,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4221, PETRI_PLACES=163, PETRI_TRANSITIONS=294} [2022-12-13 19:18:06,466 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2022-12-13 19:18:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 294 transitions, 4221 flow [2022-12-13 19:18:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.857142857142854) internal successors, (824), 14 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:06,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:06,466 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:06,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:18:06,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:18:06,668 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash 275495887, now seen corresponding path program 11 times [2022-12-13 19:18:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:06,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6325619] [2022-12-13 19:18:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6325619] [2022-12-13 19:18:06,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6325619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132414506] [2022-12-13 19:18:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:18:06,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:06,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:06,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:18:06,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 19:18:06,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:06,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:06,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:06,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:06,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132414506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:06,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:06,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 19:18:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526196683] [2022-12-13 19:18:06,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:18:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:18:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:18:06,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:06,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 294 transitions, 4221 flow. Second operand has 16 states, 16 states have (on average 58.9375) internal successors, (943), 16 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:06,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:06,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:07,580 INFO L130 PetriNetUnfolder]: 992/2018 cut-off events. [2022-12-13 19:18:07,580 INFO L131 PetriNetUnfolder]: For 31391/31391 co-relation queries the response was YES. [2022-12-13 19:18:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 2018 events. 992/2018 cut-off events. For 31391/31391 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 13544 event pairs, 87 based on Foata normal form. 68/2086 useless extension candidates. Maximal degree in co-relation 13356. Up to 1609 conditions per place. [2022-12-13 19:18:07,592 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 293 selfloop transitions, 90 changer transitions 3/386 dead transitions. [2022-12-13 19:18:07,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 386 transitions, 6014 flow [2022-12-13 19:18:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:18:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:18:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 882 transitions. [2022-12-13 19:18:07,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-13 19:18:07,593 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 882 transitions. [2022-12-13 19:18:07,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 882 transitions. [2022-12-13 19:18:07,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:07,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 882 transitions. [2022-12-13 19:18:07,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 63.0) internal successors, (882), 14 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:07,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 133.0) internal successors, (1995), 15 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:07,595 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 133.0) internal successors, (1995), 15 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:07,596 INFO L175 Difference]: Start difference. First operand has 163 places, 294 transitions, 4221 flow. Second operand 14 states and 882 transitions. [2022-12-13 19:18:07,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 386 transitions, 6014 flow [2022-12-13 19:18:07,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 386 transitions, 5958 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-12-13 19:18:07,744 INFO L231 Difference]: Finished difference. Result has 175 places, 322 transitions, 4965 flow [2022-12-13 19:18:07,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4965, PETRI_PLACES=175, PETRI_TRANSITIONS=322} [2022-12-13 19:18:07,745 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2022-12-13 19:18:07,745 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 322 transitions, 4965 flow [2022-12-13 19:18:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.9375) internal successors, (943), 16 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:07,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:07,745 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:07,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:18:07,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:18:07,946 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 926803389, now seen corresponding path program 12 times [2022-12-13 19:18:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227316148] [2022-12-13 19:18:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:07,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:08,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227316148] [2022-12-13 19:18:08,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227316148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352925613] [2022-12-13 19:18:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:18:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:08,048 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:08,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:18:08,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 19:18:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:08,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:08,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352925613] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:08,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 19:18:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923594294] [2022-12-13 19:18:08,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:08,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:18:08,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:18:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:18:08,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:08,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 322 transitions, 4965 flow. Second operand has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:08,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:08,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:08,884 INFO L130 PetriNetUnfolder]: 956/1929 cut-off events. [2022-12-13 19:18:08,884 INFO L131 PetriNetUnfolder]: For 32547/32547 co-relation queries the response was YES. [2022-12-13 19:18:08,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13747 conditions, 1929 events. 956/1929 cut-off events. For 32547/32547 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12710 event pairs, 39 based on Foata normal form. 62/1991 useless extension candidates. Maximal degree in co-relation 13450. Up to 592 conditions per place. [2022-12-13 19:18:08,897 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 183 selfloop transitions, 206 changer transitions 1/390 dead transitions. [2022-12-13 19:18:08,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 390 transitions, 6233 flow [2022-12-13 19:18:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:18:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:18:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1382 transitions. [2022-12-13 19:18:08,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47231715652768286 [2022-12-13 19:18:08,899 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1382 transitions. [2022-12-13 19:18:08,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1382 transitions. [2022-12-13 19:18:08,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:08,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1382 transitions. [2022-12-13 19:18:08,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.81818181818182) internal successors, (1382), 22 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:08,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 133.0) internal successors, (3059), 23 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:08,902 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 133.0) internal successors, (3059), 23 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:08,902 INFO L175 Difference]: Start difference. First operand has 175 places, 322 transitions, 4965 flow. Second operand 22 states and 1382 transitions. [2022-12-13 19:18:08,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 390 transitions, 6233 flow [2022-12-13 19:18:09,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 390 transitions, 5993 flow, removed 77 selfloop flow, removed 7 redundant places. [2022-12-13 19:18:09,069 INFO L231 Difference]: Finished difference. Result has 190 places, 319 transitions, 5281 flow [2022-12-13 19:18:09,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5281, PETRI_PLACES=190, PETRI_TRANSITIONS=319} [2022-12-13 19:18:09,070 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2022-12-13 19:18:09,070 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 319 transitions, 5281 flow [2022-12-13 19:18:09,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:09,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:09,070 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:09,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:18:09,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:09,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1563627279, now seen corresponding path program 13 times [2022-12-13 19:18:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:09,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287494082] [2022-12-13 19:18:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:09,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287494082] [2022-12-13 19:18:09,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287494082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222565481] [2022-12-13 19:18:09,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:18:09,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:09,365 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:09,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:18:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:09,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:09,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222565481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:09,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:09,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-12-13 19:18:09,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449945253] [2022-12-13 19:18:09,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:09,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:18:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:09,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:18:09,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:18:09,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:09,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 319 transitions, 5281 flow. Second operand has 15 states, 15 states have (on average 59.06666666666667) internal successors, (886), 15 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:09,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:09,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:09,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:10,426 INFO L130 PetriNetUnfolder]: 1388/2774 cut-off events. [2022-12-13 19:18:10,426 INFO L131 PetriNetUnfolder]: For 47373/47373 co-relation queries the response was YES. [2022-12-13 19:18:10,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20560 conditions, 2774 events. 1388/2774 cut-off events. For 47373/47373 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19460 event pairs, 71 based on Foata normal form. 74/2848 useless extension candidates. Maximal degree in co-relation 20262. Up to 1106 conditions per place. [2022-12-13 19:18:10,448 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 251 selfloop transitions, 292 changer transitions 10/553 dead transitions. [2022-12-13 19:18:10,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 553 transitions, 9825 flow [2022-12-13 19:18:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:18:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 19:18:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1323 transitions. [2022-12-13 19:18:10,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-13 19:18:10,450 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1323 transitions. [2022-12-13 19:18:10,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1323 transitions. [2022-12-13 19:18:10,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:10,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1323 transitions. [2022-12-13 19:18:10,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:10,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:10,455 INFO L175 Difference]: Start difference. First operand has 190 places, 319 transitions, 5281 flow. Second operand 21 states and 1323 transitions. [2022-12-13 19:18:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 553 transitions, 9825 flow [2022-12-13 19:18:10,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 553 transitions, 9427 flow, removed 71 selfloop flow, removed 15 redundant places. [2022-12-13 19:18:10,748 INFO L231 Difference]: Finished difference. Result has 203 places, 454 transitions, 8528 flow [2022-12-13 19:18:10,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8528, PETRI_PLACES=203, PETRI_TRANSITIONS=454} [2022-12-13 19:18:10,748 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2022-12-13 19:18:10,748 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 454 transitions, 8528 flow [2022-12-13 19:18:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.06666666666667) internal successors, (886), 15 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:10,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:10,748 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:10,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:10,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:10,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1061366575, now seen corresponding path program 14 times [2022-12-13 19:18:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:10,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439420558] [2022-12-13 19:18:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:11,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:11,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439420558] [2022-12-13 19:18:11,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439420558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:11,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652196630] [2022-12-13 19:18:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:18:11,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:11,024 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:11,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:18:11,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:18:11,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:11,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:11,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652196630] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:11,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:11,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 19:18:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072442635] [2022-12-13 19:18:11,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:18:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:18:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:18:11,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:11,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 454 transitions, 8528 flow. Second operand has 20 states, 20 states have (on average 58.55) internal successors, (1171), 20 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:11,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:11,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:11,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:12,191 INFO L130 PetriNetUnfolder]: 1491/2975 cut-off events. [2022-12-13 19:18:12,191 INFO L131 PetriNetUnfolder]: For 68087/68087 co-relation queries the response was YES. [2022-12-13 19:18:12,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24222 conditions, 2975 events. 1491/2975 cut-off events. For 68087/68087 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 20995 event pairs, 448 based on Foata normal form. 104/3079 useless extension candidates. Maximal degree in co-relation 23738. Up to 2195 conditions per place. [2022-12-13 19:18:12,216 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 447 selfloop transitions, 133 changer transitions 14/594 dead transitions. [2022-12-13 19:18:12,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 594 transitions, 11524 flow [2022-12-13 19:18:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:18:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 19:18:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1338 transitions. [2022-12-13 19:18:12,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4790547798066595 [2022-12-13 19:18:12,219 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1338 transitions. [2022-12-13 19:18:12,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1338 transitions. [2022-12-13 19:18:12,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:12,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1338 transitions. [2022-12-13 19:18:12,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.714285714285715) internal successors, (1338), 21 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:12,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:12,223 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:12,224 INFO L175 Difference]: Start difference. First operand has 203 places, 454 transitions, 8528 flow. Second operand 21 states and 1338 transitions. [2022-12-13 19:18:12,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 594 transitions, 11524 flow [2022-12-13 19:18:12,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 594 transitions, 11065 flow, removed 203 selfloop flow, removed 8 redundant places. [2022-12-13 19:18:12,665 INFO L231 Difference]: Finished difference. Result has 225 places, 505 transitions, 9801 flow [2022-12-13 19:18:12,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9801, PETRI_PLACES=225, PETRI_TRANSITIONS=505} [2022-12-13 19:18:12,665 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2022-12-13 19:18:12,665 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 505 transitions, 9801 flow [2022-12-13 19:18:12,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.55) internal successors, (1171), 20 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:12,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:12,666 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:12,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:18:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 19:18:12,867 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash -942437375, now seen corresponding path program 15 times [2022-12-13 19:18:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:12,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951238427] [2022-12-13 19:18:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951238427] [2022-12-13 19:18:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951238427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294486956] [2022-12-13 19:18:12,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:18:12,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:12,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:12,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:12,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:18:13,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:18:13,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:18:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:13,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:13,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294486956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:13,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-13 19:18:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096265480] [2022-12-13 19:18:13,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:13,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:18:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:18:13,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:18:13,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:13,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 505 transitions, 9801 flow. Second operand has 17 states, 17 states have (on average 58.76470588235294) internal successors, (999), 17 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:13,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:13,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:13,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:13,981 INFO L130 PetriNetUnfolder]: 1526/3026 cut-off events. [2022-12-13 19:18:13,982 INFO L131 PetriNetUnfolder]: For 74519/74519 co-relation queries the response was YES. [2022-12-13 19:18:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25266 conditions, 3026 events. 1526/3026 cut-off events. For 74519/74519 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21297 event pairs, 173 based on Foata normal form. 6/3032 useless extension candidates. Maximal degree in co-relation 24522. Up to 960 conditions per place. [2022-12-13 19:18:14,003 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 312 selfloop transitions, 280 changer transitions 11/603 dead transitions. [2022-12-13 19:18:14,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 603 transitions, 12147 flow [2022-12-13 19:18:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:18:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 19:18:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1603 transitions. [2022-12-13 19:18:14,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46356275303643724 [2022-12-13 19:18:14,005 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1603 transitions. [2022-12-13 19:18:14,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1603 transitions. [2022-12-13 19:18:14,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:14,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1603 transitions. [2022-12-13 19:18:14,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:14,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:14,009 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:14,009 INFO L175 Difference]: Start difference. First operand has 225 places, 505 transitions, 9801 flow. Second operand 26 states and 1603 transitions. [2022-12-13 19:18:14,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 603 transitions, 12147 flow [2022-12-13 19:18:14,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 603 transitions, 10968 flow, removed 585 selfloop flow, removed 3 redundant places. [2022-12-13 19:18:14,625 INFO L231 Difference]: Finished difference. Result has 251 places, 538 transitions, 9983 flow [2022-12-13 19:18:14,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=8848, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9983, PETRI_PLACES=251, PETRI_TRANSITIONS=538} [2022-12-13 19:18:14,626 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 231 predicate places. [2022-12-13 19:18:14,626 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 538 transitions, 9983 flow [2022-12-13 19:18:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.76470588235294) internal successors, (999), 17 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:14,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:14,626 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:14,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:18:14,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:14,828 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:14,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash -670993280, now seen corresponding path program 16 times [2022-12-13 19:18:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:14,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113932268] [2022-12-13 19:18:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:14,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113932268] [2022-12-13 19:18:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113932268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033608018] [2022-12-13 19:18:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:14,916 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:14,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:18:14,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:18:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:15,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:15,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033608018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:15,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:15,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-13 19:18:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269677389] [2022-12-13 19:18:15,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:15,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:18:15,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:18:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:18:15,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2022-12-13 19:18:15,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 538 transitions, 9983 flow. Second operand has 6 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:15,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:15,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2022-12-13 19:18:15,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:16,196 INFO L130 PetriNetUnfolder]: 2290/4492 cut-off events. [2022-12-13 19:18:16,196 INFO L131 PetriNetUnfolder]: For 101574/101585 co-relation queries the response was YES. [2022-12-13 19:18:16,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36830 conditions, 4492 events. 2290/4492 cut-off events. For 101574/101585 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33937 event pairs, 199 based on Foata normal form. 35/4525 useless extension candidates. Maximal degree in co-relation 35633. Up to 2266 conditions per place. [2022-12-13 19:18:16,238 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 490 selfloop transitions, 302 changer transitions 105/905 dead transitions. [2022-12-13 19:18:16,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 905 transitions, 18127 flow [2022-12-13 19:18:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:18:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:18:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 453 transitions. [2022-12-13 19:18:16,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5676691729323309 [2022-12-13 19:18:16,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 453 transitions. [2022-12-13 19:18:16,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 453 transitions. [2022-12-13 19:18:16,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:16,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 453 transitions. [2022-12-13 19:18:16,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:16,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-12-13 19:18:16,242 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-12-13 19:18:16,242 INFO L175 Difference]: Start difference. First operand has 251 places, 538 transitions, 9983 flow. Second operand 6 states and 453 transitions. [2022-12-13 19:18:16,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 905 transitions, 18127 flow [2022-12-13 19:18:17,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 905 transitions, 17583 flow, removed 222 selfloop flow, removed 8 redundant places. [2022-12-13 19:18:17,040 INFO L231 Difference]: Finished difference. Result has 251 places, 719 transitions, 14510 flow [2022-12-13 19:18:17,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14510, PETRI_PLACES=251, PETRI_TRANSITIONS=719} [2022-12-13 19:18:17,040 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 231 predicate places. [2022-12-13 19:18:17,040 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 719 transitions, 14510 flow [2022-12-13 19:18:17,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:17,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:17,041 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:17,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 19:18:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 19:18:17,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 334028038, now seen corresponding path program 17 times [2022-12-13 19:18:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:17,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002550128] [2022-12-13 19:18:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:17,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002550128] [2022-12-13 19:18:17,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002550128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285305511] [2022-12-13 19:18:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:18:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:17,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:17,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:17,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:18:17,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 19:18:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:17,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:17,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285305511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:17,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:17,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 19:18:17,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458549338] [2022-12-13 19:18:17,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:18:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:18:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:18:17,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:17,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 719 transitions, 14510 flow. Second operand has 17 states, 17 states have (on average 58.88235294117647) internal successors, (1001), 17 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:17,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:17,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:19,153 INFO L130 PetriNetUnfolder]: 2585/5107 cut-off events. [2022-12-13 19:18:19,153 INFO L131 PetriNetUnfolder]: For 132780/132780 co-relation queries the response was YES. [2022-12-13 19:18:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44492 conditions, 5107 events. 2585/5107 cut-off events. For 132780/132780 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39702 event pairs, 209 based on Foata normal form. 50/5157 useless extension candidates. Maximal degree in co-relation 42821. Up to 3877 conditions per place. [2022-12-13 19:18:19,193 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 729 selfloop transitions, 190 changer transitions 51/970 dead transitions. [2022-12-13 19:18:19,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 970 transitions, 21094 flow [2022-12-13 19:18:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:18:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:18:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 704 transitions. [2022-12-13 19:18:19,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2022-12-13 19:18:19,194 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 704 transitions. [2022-12-13 19:18:19,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 704 transitions. [2022-12-13 19:18:19,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:19,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 704 transitions. [2022-12-13 19:18:19,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 64.0) internal successors, (704), 11 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:19,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:19,196 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:19,196 INFO L175 Difference]: Start difference. First operand has 251 places, 719 transitions, 14510 flow. Second operand 11 states and 704 transitions. [2022-12-13 19:18:19,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 970 transitions, 21094 flow [2022-12-13 19:18:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 970 transitions, 20664 flow, removed 215 selfloop flow, removed 0 redundant places. [2022-12-13 19:18:20,275 INFO L231 Difference]: Finished difference. Result has 267 places, 843 transitions, 17930 flow [2022-12-13 19:18:20,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=14138, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17930, PETRI_PLACES=267, PETRI_TRANSITIONS=843} [2022-12-13 19:18:20,276 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 247 predicate places. [2022-12-13 19:18:20,276 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 843 transitions, 17930 flow [2022-12-13 19:18:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.88235294117647) internal successors, (1001), 17 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:20,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:20,276 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:20,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 19:18:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 19:18:20,477 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash 201446670, now seen corresponding path program 18 times [2022-12-13 19:18:20,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:20,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932993503] [2022-12-13 19:18:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:20,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932993503] [2022-12-13 19:18:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932993503] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983614623] [2022-12-13 19:18:20,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:18:20,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:20,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:20,587 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:20,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 19:18:20,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 19:18:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:20,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983614623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:20,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 19:18:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986587229] [2022-12-13 19:18:20,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:20,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:18:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:18:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:18:20,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:20,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 843 transitions, 17930 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:20,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:20,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:20,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:23,597 INFO L130 PetriNetUnfolder]: 3175/6354 cut-off events. [2022-12-13 19:18:23,597 INFO L131 PetriNetUnfolder]: For 197937/197937 co-relation queries the response was YES. [2022-12-13 19:18:23,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57845 conditions, 6354 events. 3175/6354 cut-off events. For 197937/197937 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 51972 event pairs, 35 based on Foata normal form. 34/6388 useless extension candidates. Maximal degree in co-relation 56195. Up to 1676 conditions per place. [2022-12-13 19:18:23,646 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 329 selfloop transitions, 837 changer transitions 39/1205 dead transitions. [2022-12-13 19:18:23,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1205 transitions, 26423 flow [2022-12-13 19:18:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 19:18:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 19:18:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3044 transitions. [2022-12-13 19:18:23,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46708608255332207 [2022-12-13 19:18:23,649 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3044 transitions. [2022-12-13 19:18:23,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3044 transitions. [2022-12-13 19:18:23,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:23,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3044 transitions. [2022-12-13 19:18:23,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 62.12244897959184) internal successors, (3044), 49 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:23,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 133.0) internal successors, (6650), 50 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:23,657 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 133.0) internal successors, (6650), 50 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:23,657 INFO L175 Difference]: Start difference. First operand has 267 places, 843 transitions, 17930 flow. Second operand 49 states and 3044 transitions. [2022-12-13 19:18:23,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1205 transitions, 26423 flow [2022-12-13 19:18:25,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1205 transitions, 26172 flow, removed 97 selfloop flow, removed 5 redundant places. [2022-12-13 19:18:25,523 INFO L231 Difference]: Finished difference. Result has 319 places, 1040 transitions, 24795 flow [2022-12-13 19:18:25,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=17761, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=24795, PETRI_PLACES=319, PETRI_TRANSITIONS=1040} [2022-12-13 19:18:25,524 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 299 predicate places. [2022-12-13 19:18:25,524 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1040 transitions, 24795 flow [2022-12-13 19:18:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:25,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:25,524 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:25,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 19:18:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:18:25,726 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1381465614, now seen corresponding path program 19 times [2022-12-13 19:18:25,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:25,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140134135] [2022-12-13 19:18:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:25,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:25,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140134135] [2022-12-13 19:18:25,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140134135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105215285] [2022-12-13 19:18:25,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:18:25,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:25,829 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:25,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 19:18:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:25,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105215285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:25,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 19:18:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422985432] [2022-12-13 19:18:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:18:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:18:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:18:26,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:26,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1040 transitions, 24795 flow. Second operand has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:26,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:26,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:26,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:29,096 INFO L130 PetriNetUnfolder]: 3547/6951 cut-off events. [2022-12-13 19:18:29,096 INFO L131 PetriNetUnfolder]: For 287360/287360 co-relation queries the response was YES. [2022-12-13 19:18:29,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68764 conditions, 6951 events. 3547/6951 cut-off events. For 287360/287360 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 56569 event pairs, 205 based on Foata normal form. 248/7199 useless extension candidates. Maximal degree in co-relation 66990. Up to 3346 conditions per place. [2022-12-13 19:18:29,155 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 685 selfloop transitions, 622 changer transitions 18/1325 dead transitions. [2022-12-13 19:18:29,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1325 transitions, 32698 flow [2022-12-13 19:18:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 19:18:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 19:18:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1887 transitions. [2022-12-13 19:18:29,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47293233082706765 [2022-12-13 19:18:29,157 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1887 transitions. [2022-12-13 19:18:29,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1887 transitions. [2022-12-13 19:18:29,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:29,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1887 transitions. [2022-12-13 19:18:29,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.9) internal successors, (1887), 30 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:29,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 133.0) internal successors, (4123), 31 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:29,162 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 133.0) internal successors, (4123), 31 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:29,162 INFO L175 Difference]: Start difference. First operand has 319 places, 1040 transitions, 24795 flow. Second operand 30 states and 1887 transitions. [2022-12-13 19:18:29,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1325 transitions, 32698 flow [2022-12-13 19:18:32,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1325 transitions, 29138 flow, removed 1445 selfloop flow, removed 15 redundant places. [2022-12-13 19:18:32,731 INFO L231 Difference]: Finished difference. Result has 339 places, 1184 transitions, 27428 flow [2022-12-13 19:18:32,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=21694, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27428, PETRI_PLACES=339, PETRI_TRANSITIONS=1184} [2022-12-13 19:18:32,732 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 319 predicate places. [2022-12-13 19:18:32,732 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1184 transitions, 27428 flow [2022-12-13 19:18:32,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:32,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:32,732 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:32,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:32,933 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1517491682, now seen corresponding path program 20 times [2022-12-13 19:18:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495956015] [2022-12-13 19:18:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495956015] [2022-12-13 19:18:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495956015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096227782] [2022-12-13 19:18:33,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:18:33,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:33,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:33,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 19:18:33,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:18:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:33,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:33,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:33,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096227782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:33,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 19:18:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684394175] [2022-12-13 19:18:33,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:33,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:18:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:18:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:18:33,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:33,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1184 transitions, 27428 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:33,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:33,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:33,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:36,427 INFO L130 PetriNetUnfolder]: 3495/6854 cut-off events. [2022-12-13 19:18:36,427 INFO L131 PetriNetUnfolder]: For 244387/244387 co-relation queries the response was YES. [2022-12-13 19:18:36,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66304 conditions, 6854 events. 3495/6854 cut-off events. For 244387/244387 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 55676 event pairs, 107 based on Foata normal form. 60/6914 useless extension candidates. Maximal degree in co-relation 64488. Up to 1908 conditions per place. [2022-12-13 19:18:36,489 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 428 selfloop transitions, 866 changer transitions 1/1295 dead transitions. [2022-12-13 19:18:36,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1295 transitions, 30962 flow [2022-12-13 19:18:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 19:18:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 19:18:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2190 transitions. [2022-12-13 19:18:36,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47046186895810954 [2022-12-13 19:18:36,492 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2190 transitions. [2022-12-13 19:18:36,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2190 transitions. [2022-12-13 19:18:36,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:36,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2190 transitions. [2022-12-13 19:18:36,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.57142857142857) internal successors, (2190), 35 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:36,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 133.0) internal successors, (4788), 36 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:36,497 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 133.0) internal successors, (4788), 36 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:36,497 INFO L175 Difference]: Start difference. First operand has 339 places, 1184 transitions, 27428 flow. Second operand 35 states and 2190 transitions. [2022-12-13 19:18:36,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1295 transitions, 30962 flow [2022-12-13 19:18:40,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1295 transitions, 30297 flow, removed 192 selfloop flow, removed 11 redundant places. [2022-12-13 19:18:40,085 INFO L231 Difference]: Finished difference. Result has 362 places, 1185 transitions, 29077 flow [2022-12-13 19:18:40,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=26621, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=29077, PETRI_PLACES=362, PETRI_TRANSITIONS=1185} [2022-12-13 19:18:40,085 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 342 predicate places. [2022-12-13 19:18:40,086 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1185 transitions, 29077 flow [2022-12-13 19:18:40,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:40,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:40,086 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:40,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 19:18:40,287 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1725048050, now seen corresponding path program 21 times [2022-12-13 19:18:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255469021] [2022-12-13 19:18:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255469021] [2022-12-13 19:18:40,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255469021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195354780] [2022-12-13 19:18:40,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:18:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:40,353 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:40,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 19:18:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:18:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:40,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195354780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:40,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:40,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 19:18:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676512233] [2022-12-13 19:18:40,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:40,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:18:40,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:18:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:18:40,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:40,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1185 transitions, 29077 flow. Second operand has 21 states, 21 states have (on average 58.857142857142854) internal successors, (1236), 21 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:40,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:40,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:40,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:44,707 INFO L130 PetriNetUnfolder]: 4644/8969 cut-off events. [2022-12-13 19:18:44,707 INFO L131 PetriNetUnfolder]: For 334279/334279 co-relation queries the response was YES. [2022-12-13 19:18:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90409 conditions, 8969 events. 4644/8969 cut-off events. For 334279/334279 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 75195 event pairs, 295 based on Foata normal form. 80/9049 useless extension candidates. Maximal degree in co-relation 88628. Up to 5903 conditions per place. [2022-12-13 19:18:44,829 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 1160 selfloop transitions, 570 changer transitions 13/1743 dead transitions. [2022-12-13 19:18:44,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1743 transitions, 45015 flow [2022-12-13 19:18:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 19:18:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 19:18:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1768 transitions. [2022-12-13 19:18:44,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4747583243823845 [2022-12-13 19:18:44,832 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1768 transitions. [2022-12-13 19:18:44,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1768 transitions. [2022-12-13 19:18:44,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:44,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1768 transitions. [2022-12-13 19:18:44,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 63.142857142857146) internal successors, (1768), 28 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:44,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 133.0) internal successors, (3857), 29 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:44,836 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 133.0) internal successors, (3857), 29 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:44,836 INFO L175 Difference]: Start difference. First operand has 362 places, 1185 transitions, 29077 flow. Second operand 28 states and 1768 transitions. [2022-12-13 19:18:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1743 transitions, 45015 flow [2022-12-13 19:18:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1743 transitions, 43664 flow, removed 111 selfloop flow, removed 26 redundant places. [2022-12-13 19:18:50,171 INFO L231 Difference]: Finished difference. Result has 372 places, 1527 transitions, 39178 flow [2022-12-13 19:18:50,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=28154, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=39178, PETRI_PLACES=372, PETRI_TRANSITIONS=1527} [2022-12-13 19:18:50,172 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 352 predicate places. [2022-12-13 19:18:50,172 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1527 transitions, 39178 flow [2022-12-13 19:18:50,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.857142857142854) internal successors, (1236), 21 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:50,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:50,172 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:50,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 19:18:50,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:18:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash 604746000, now seen corresponding path program 22 times [2022-12-13 19:18:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:50,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128079214] [2022-12-13 19:18:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:50,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:50,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128079214] [2022-12-13 19:18:50,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128079214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847855956] [2022-12-13 19:18:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:50,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:50,450 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:50,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 19:18:50,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:50,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:18:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:50,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847855956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:50,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:50,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-12-13 19:18:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701579004] [2022-12-13 19:18:50,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:50,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:18:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:18:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:18:50,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:18:50,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1527 transitions, 39178 flow. Second operand has 18 states, 18 states have (on average 58.888888888888886) internal successors, (1060), 18 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:50,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:50,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:18:50,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:56,160 INFO L130 PetriNetUnfolder]: 5097/9840 cut-off events. [2022-12-13 19:18:56,160 INFO L131 PetriNetUnfolder]: For 411025/411025 co-relation queries the response was YES. [2022-12-13 19:18:56,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101896 conditions, 9840 events. 5097/9840 cut-off events. For 411025/411025 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 84069 event pairs, 123 based on Foata normal form. 188/10028 useless extension candidates. Maximal degree in co-relation 100070. Up to 2882 conditions per place. [2022-12-13 19:18:56,260 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 559 selfloop transitions, 1271 changer transitions 20/1850 dead transitions. [2022-12-13 19:18:56,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1850 transitions, 49404 flow [2022-12-13 19:18:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 19:18:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 19:18:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1693 transitions. [2022-12-13 19:18:56,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47145641882483985 [2022-12-13 19:18:56,262 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1693 transitions. [2022-12-13 19:18:56,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1693 transitions. [2022-12-13 19:18:56,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:56,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1693 transitions. [2022-12-13 19:18:56,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.7037037037037) internal successors, (1693), 27 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:56,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:56,266 INFO L175 Difference]: Start difference. First operand has 372 places, 1527 transitions, 39178 flow. Second operand 27 states and 1693 transitions. [2022-12-13 19:18:56,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1850 transitions, 49404 flow [2022-12-13 19:19:03,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1850 transitions, 47782 flow, removed 378 selfloop flow, removed 8 redundant places. [2022-12-13 19:19:03,401 INFO L231 Difference]: Finished difference. Result has 395 places, 1690 transitions, 46422 flow [2022-12-13 19:19:03,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=37683, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46422, PETRI_PLACES=395, PETRI_TRANSITIONS=1690} [2022-12-13 19:19:03,402 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2022-12-13 19:19:03,402 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1690 transitions, 46422 flow [2022-12-13 19:19:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.888888888888886) internal successors, (1060), 18 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:03,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:19:03,403 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:19:03,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 19:19:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 19:19:03,604 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:19:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:19:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1240982672, now seen corresponding path program 23 times [2022-12-13 19:19:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:19:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528726830] [2022-12-13 19:19:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:19:03,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:19:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:19:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:03,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:19:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528726830] [2022-12-13 19:19:03,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528726830] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:19:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146820903] [2022-12-13 19:19:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:19:03,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:19:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:19:03,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:19:03,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 19:19:03,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 19:19:03,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:19:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:19:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:19:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:03,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:19:03,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146820903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:03,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:19:03,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-12-13 19:19:03,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042977129] [2022-12-13 19:19:03,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 19:19:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:19:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 19:19:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:19:03,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:19:03,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1690 transitions, 46422 flow. Second operand has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:03,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:03,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:19:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:10,678 INFO L130 PetriNetUnfolder]: 5875/11236 cut-off events. [2022-12-13 19:19:10,678 INFO L131 PetriNetUnfolder]: For 439958/439958 co-relation queries the response was YES. [2022-12-13 19:19:10,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122603 conditions, 11236 events. 5875/11236 cut-off events. For 439958/439958 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 97022 event pairs, 299 based on Foata normal form. 70/11306 useless extension candidates. Maximal degree in co-relation 120774. Up to 7170 conditions per place. [2022-12-13 19:19:10,802 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 1292 selfloop transitions, 847 changer transitions 21/2160 dead transitions. [2022-12-13 19:19:10,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2160 transitions, 61707 flow [2022-12-13 19:19:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:19:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:19:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1516 transitions. [2022-12-13 19:19:10,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.474937343358396 [2022-12-13 19:19:10,804 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1516 transitions. [2022-12-13 19:19:10,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1516 transitions. [2022-12-13 19:19:10,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:10,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1516 transitions. [2022-12-13 19:19:10,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 63.166666666666664) internal successors, (1516), 24 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:10,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 133.0) internal successors, (3325), 25 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:10,807 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 133.0) internal successors, (3325), 25 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:10,807 INFO L175 Difference]: Start difference. First operand has 395 places, 1690 transitions, 46422 flow. Second operand 24 states and 1516 transitions. [2022-12-13 19:19:10,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2160 transitions, 61707 flow [2022-12-13 19:19:19,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2160 transitions, 60649 flow, removed 422 selfloop flow, removed 13 redundant places. [2022-12-13 19:19:19,958 INFO L231 Difference]: Finished difference. Result has 416 places, 1978 transitions, 56700 flow [2022-12-13 19:19:19,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=45623, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=56700, PETRI_PLACES=416, PETRI_TRANSITIONS=1978} [2022-12-13 19:19:19,959 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 396 predicate places. [2022-12-13 19:19:19,959 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1978 transitions, 56700 flow [2022-12-13 19:19:19,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:19,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:19:19,959 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:19:19,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 19:19:20,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:19:20,160 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:19:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:19:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash -685051406, now seen corresponding path program 24 times [2022-12-13 19:19:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:19:20,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001610755] [2022-12-13 19:19:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:19:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:19:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:19:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:19:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001610755] [2022-12-13 19:19:20,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001610755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:19:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600812360] [2022-12-13 19:19:20,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:19:20,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:19:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:19:20,230 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:19:20,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 19:19:20,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 19:19:20,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:19:20,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:19:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:19:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:20,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600812360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:20,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:19:20,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-12-13 19:19:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940014989] [2022-12-13 19:19:20,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 19:19:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:19:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 19:19:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:19:20,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:19:20,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1978 transitions, 56700 flow. Second operand has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:20,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:20,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:19:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:29,578 INFO L130 PetriNetUnfolder]: 7394/14154 cut-off events. [2022-12-13 19:19:29,578 INFO L131 PetriNetUnfolder]: For 696464/696464 co-relation queries the response was YES. [2022-12-13 19:19:29,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160167 conditions, 14154 events. 7394/14154 cut-off events. For 696464/696464 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 125874 event pairs, 195 based on Foata normal form. 214/14368 useless extension candidates. Maximal degree in co-relation 158380. Up to 4254 conditions per place. [2022-12-13 19:19:29,742 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 816 selfloop transitions, 1844 changer transitions 31/2691 dead transitions. [2022-12-13 19:19:29,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 2691 transitions, 79237 flow [2022-12-13 19:19:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 19:19:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 19:19:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1952 transitions. [2022-12-13 19:19:29,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47344166868784865 [2022-12-13 19:19:29,745 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1952 transitions. [2022-12-13 19:19:29,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1952 transitions. [2022-12-13 19:19:29,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:29,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1952 transitions. [2022-12-13 19:19:29,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 62.96774193548387) internal successors, (1952), 31 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:29,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 133.0) internal successors, (4256), 32 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:29,749 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 133.0) internal successors, (4256), 32 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:29,749 INFO L175 Difference]: Start difference. First operand has 416 places, 1978 transitions, 56700 flow. Second operand 31 states and 1952 transitions. [2022-12-13 19:19:29,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 2691 transitions, 79237 flow [2022-12-13 19:19:43,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 2691 transitions, 78752 flow, removed 208 selfloop flow, removed 6 redundant places. [2022-12-13 19:19:44,021 INFO L231 Difference]: Finished difference. Result has 451 places, 2474 transitions, 77170 flow [2022-12-13 19:19:44,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=56241, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=77170, PETRI_PLACES=451, PETRI_TRANSITIONS=2474} [2022-12-13 19:19:44,023 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2022-12-13 19:19:44,023 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 2474 transitions, 77170 flow [2022-12-13 19:19:44,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:44,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:19:44,023 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:19:44,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 19:19:44,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:19:44,224 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:19:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:19:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash -26638020, now seen corresponding path program 25 times [2022-12-13 19:19:44,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:19:44,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790011617] [2022-12-13 19:19:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:19:44,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:19:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:19:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:19:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790011617] [2022-12-13 19:19:44,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790011617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:19:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792100876] [2022-12-13 19:19:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:19:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:19:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:19:44,323 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:19:44,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 19:19:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:19:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:19:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:19:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:44,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:19:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792100876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:44,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:19:44,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-12-13 19:19:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277899895] [2022-12-13 19:19:44,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:19:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:19:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:19:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:19:44,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:19:44,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2474 transitions, 77170 flow. Second operand has 21 states, 21 states have (on average 58.714285714285715) internal successors, (1233), 21 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:44,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:44,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:19:44,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:57,457 INFO L130 PetriNetUnfolder]: 7654/14716 cut-off events. [2022-12-13 19:19:57,457 INFO L131 PetriNetUnfolder]: For 783338/783338 co-relation queries the response was YES. [2022-12-13 19:19:57,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177554 conditions, 14716 events. 7654/14716 cut-off events. For 783338/783338 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 132121 event pairs, 2559 based on Foata normal form. 98/14814 useless extension candidates. Maximal degree in co-relation 173964. Up to 12662 conditions per place. [2022-12-13 19:19:57,697 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 2367 selfloop transitions, 319 changer transitions 32/2718 dead transitions. [2022-12-13 19:19:57,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 2718 transitions, 86630 flow [2022-12-13 19:19:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:19:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 19:19:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1661 transitions. [2022-12-13 19:19:57,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48033545401966454 [2022-12-13 19:19:57,700 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1661 transitions. [2022-12-13 19:19:57,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1661 transitions. [2022-12-13 19:19:57,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:57,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1661 transitions. [2022-12-13 19:19:57,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 63.88461538461539) internal successors, (1661), 26 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:57,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:57,706 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:57,706 INFO L175 Difference]: Start difference. First operand has 451 places, 2474 transitions, 77170 flow. Second operand 26 states and 1661 transitions. [2022-12-13 19:19:57,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 2718 transitions, 86630 flow [2022-12-13 19:20:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2718 transitions, 84826 flow, removed 706 selfloop flow, removed 15 redundant places. [2022-12-13 19:20:18,073 INFO L231 Difference]: Finished difference. Result has 468 places, 2572 transitions, 78359 flow [2022-12-13 19:20:18,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=75366, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=78359, PETRI_PLACES=468, PETRI_TRANSITIONS=2572} [2022-12-13 19:20:18,074 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 448 predicate places. [2022-12-13 19:20:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 2572 transitions, 78359 flow [2022-12-13 19:20:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.714285714285715) internal successors, (1233), 21 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:18,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:18,075 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:18,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 19:20:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:20:18,276 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:20:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2107925474, now seen corresponding path program 26 times [2022-12-13 19:20:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:20:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878596319] [2022-12-13 19:20:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:18,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:20:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:18,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:20:18,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878596319] [2022-12-13 19:20:18,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878596319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:20:18,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539590520] [2022-12-13 19:20:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:20:18,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:20:18,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:20:18,379 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:20:18,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 19:20:18,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:20:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:20:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:20:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:18,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:18,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539590520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:18,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:20:18,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-12-13 19:20:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848118320] [2022-12-13 19:20:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:20:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:20:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:20:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:20:18,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:20:18,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 2572 transitions, 78359 flow. Second operand has 21 states, 21 states have (on average 58.666666666666664) internal successors, (1232), 21 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:18,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:18,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:20:18,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:30,557 INFO L130 PetriNetUnfolder]: 7610/14584 cut-off events. [2022-12-13 19:20:30,557 INFO L131 PetriNetUnfolder]: For 755325/755325 co-relation queries the response was YES. [2022-12-13 19:20:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175875 conditions, 14584 events. 7610/14584 cut-off events. For 755325/755325 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 130306 event pairs, 873 based on Foata normal form. 14/14598 useless extension candidates. Maximal degree in co-relation 172280. Up to 4999 conditions per place. [2022-12-13 19:20:30,745 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 1568 selfloop transitions, 1114 changer transitions 21/2703 dead transitions. [2022-12-13 19:20:30,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 2703 transitions, 85641 flow [2022-12-13 19:20:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:20:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 19:20:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2285 transitions. [2022-12-13 19:20:30,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4643365169680959 [2022-12-13 19:20:30,747 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2285 transitions. [2022-12-13 19:20:30,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2285 transitions. [2022-12-13 19:20:30,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:30,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2285 transitions. [2022-12-13 19:20:30,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.75675675675676) internal successors, (2285), 37 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:30,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 133.0) internal successors, (5054), 38 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:30,752 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 133.0) internal successors, (5054), 38 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:30,753 INFO L175 Difference]: Start difference. First operand has 468 places, 2572 transitions, 78359 flow. Second operand 37 states and 2285 transitions. [2022-12-13 19:20:30,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 2703 transitions, 85641 flow [2022-12-13 19:20:53,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2703 transitions, 84204 flow, removed 351 selfloop flow, removed 9 redundant places. [2022-12-13 19:20:53,068 INFO L231 Difference]: Finished difference. Result has 496 places, 2598 transitions, 79836 flow [2022-12-13 19:20:53,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=76938, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=79836, PETRI_PLACES=496, PETRI_TRANSITIONS=2598} [2022-12-13 19:20:53,069 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 476 predicate places. [2022-12-13 19:20:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2598 transitions, 79836 flow [2022-12-13 19:20:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.666666666666664) internal successors, (1232), 21 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:53,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:53,069 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:53,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 19:20:53,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 19:20:53,270 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:20:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -667689759, now seen corresponding path program 27 times [2022-12-13 19:20:53,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:20:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132385116] [2022-12-13 19:20:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:53,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:20:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:20:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:20:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132385116] [2022-12-13 19:20:53,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132385116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:20:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773989129] [2022-12-13 19:20:53,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:20:53,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:20:53,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:20:53,383 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:20:53,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 19:20:53,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:20:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:20:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:20:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:53,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:53,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773989129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:53,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:20:53,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-12-13 19:20:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764530740] [2022-12-13 19:20:53,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:20:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:20:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:20:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:20:53,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2022-12-13 19:20:53,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2598 transitions, 79836 flow. Second operand has 12 states, 12 states have (on average 68.66666666666667) internal successors, (824), 12 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:53,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:53,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2022-12-13 19:20:53,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:10,595 INFO L130 PetriNetUnfolder]: 10760/20503 cut-off events. [2022-12-13 19:21:10,595 INFO L131 PetriNetUnfolder]: For 1149518/1149528 co-relation queries the response was YES. [2022-12-13 19:21:10,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252090 conditions, 20503 events. 10760/20503 cut-off events. For 1149518/1149528 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 191790 event pairs, 740 based on Foata normal form. 40/20541 useless extension candidates. Maximal degree in co-relation 247935. Up to 10655 conditions per place. [2022-12-13 19:21:10,914 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 2087 selfloop transitions, 1625 changer transitions 170/3891 dead transitions. [2022-12-13 19:21:10,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 3891 transitions, 123674 flow [2022-12-13 19:21:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:21:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:21:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 530 transitions. [2022-12-13 19:21:10,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.569280343716434 [2022-12-13 19:21:10,916 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 530 transitions. [2022-12-13 19:21:10,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 530 transitions. [2022-12-13 19:21:10,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:10,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 530 transitions. [2022-12-13 19:21:10,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,917 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,917 INFO L175 Difference]: Start difference. First operand has 496 places, 2598 transitions, 79836 flow. Second operand 7 states and 530 transitions. [2022-12-13 19:21:10,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 3891 transitions, 123674 flow [2022-12-13 19:21:42,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 3891 transitions, 121226 flow, removed 768 selfloop flow, removed 15 redundant places. [2022-12-13 19:21:43,010 INFO L231 Difference]: Finished difference. Result has 491 places, 3503 transitions, 112835 flow [2022-12-13 19:21:43,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=78590, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=112835, PETRI_PLACES=491, PETRI_TRANSITIONS=3503} [2022-12-13 19:21:43,012 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 471 predicate places. [2022-12-13 19:21:43,012 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 3503 transitions, 112835 flow [2022-12-13 19:21:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 68.66666666666667) internal successors, (824), 12 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:43,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:43,012 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:43,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:43,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:43,213 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:21:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1129319645, now seen corresponding path program 28 times [2022-12-13 19:21:43,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:43,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21812004] [2022-12-13 19:21:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:43,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21812004] [2022-12-13 19:21:43,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21812004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163862395] [2022-12-13 19:21:43,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:21:43,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:43,340 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 19:21:43,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:21:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:21:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:43,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163862395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:43,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:43,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-13 19:21:43,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172137837] [2022-12-13 19:21:43,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:21:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:21:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:21:43,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:21:43,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 3503 transitions, 112835 flow. Second operand has 20 states, 20 states have (on average 58.6) internal successors, (1172), 20 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:43,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:43,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:21:43,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:22:11,232 INFO L130 PetriNetUnfolder]: 12538/23865 cut-off events. [2022-12-13 19:22:11,232 INFO L131 PetriNetUnfolder]: For 1381907/1381907 co-relation queries the response was YES. [2022-12-13 19:22:11,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305475 conditions, 23865 events. 12538/23865 cut-off events. For 1381907/1381907 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 227301 event pairs, 1087 based on Foata normal form. 84/23949 useless extension candidates. Maximal degree in co-relation 300063. Up to 19630 conditions per place. [2022-12-13 19:22:11,661 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 3613 selfloop transitions, 706 changer transitions 76/4395 dead transitions. [2022-12-13 19:22:11,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 4395 transitions, 149208 flow [2022-12-13 19:22:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:22:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:22:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 830 transitions. [2022-12-13 19:22:11,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4800462695199537 [2022-12-13 19:22:11,663 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 830 transitions. [2022-12-13 19:22:11,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 830 transitions. [2022-12-13 19:22:11,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:22:11,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 830 transitions. [2022-12-13 19:22:11,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.84615384615385) internal successors, (830), 13 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) [2022-12-13 19:22:11,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 133.0) internal successors, (1862), 14 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:11,666 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 133.0) internal successors, (1862), 14 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:11,666 INFO L175 Difference]: Start difference. First operand has 491 places, 3503 transitions, 112835 flow. Second operand 13 states and 830 transitions. [2022-12-13 19:22:11,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 4395 transitions, 149208 flow [2022-12-13 19:22:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 4395 transitions, 146970 flow, removed 1051 selfloop flow, removed 2 redundant places. [2022-12-13 19:22:56,928 INFO L231 Difference]: Finished difference. Result has 508 places, 4055 transitions, 134243 flow [2022-12-13 19:22:56,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=110681, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=134243, PETRI_PLACES=508, PETRI_TRANSITIONS=4055} [2022-12-13 19:22:56,930 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 488 predicate places. [2022-12-13 19:22:56,930 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 4055 transitions, 134243 flow [2022-12-13 19:22:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.6) internal successors, (1172), 20 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:56,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:22:56,931 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:22:56,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 19:22:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:22:57,132 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:22:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:22:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1769350963, now seen corresponding path program 29 times [2022-12-13 19:22:57,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:22:57,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57079437] [2022-12-13 19:22:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:22:57,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:22:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:22:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:22:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:22:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57079437] [2022-12-13 19:22:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57079437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:22:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347492895] [2022-12-13 19:22:57,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:22:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:22:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:22:57,238 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:22:57,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 19:22:57,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 19:22:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:22:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:22:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:22:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:22:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:22:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:22:57,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347492895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:22:57,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:22:57,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 19:22:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173962957] [2022-12-13 19:22:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:22:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:22:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:22:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:22:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:22:57,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:22:57,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 4055 transitions, 134243 flow. Second operand has 21 states, 21 states have (on average 58.57142857142857) internal successors, (1230), 21 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:57,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:22:57,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:22:57,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:23:33,651 INFO L130 PetriNetUnfolder]: 13860/26514 cut-off events. [2022-12-13 19:23:33,651 INFO L131 PetriNetUnfolder]: For 1681159/1681159 co-relation queries the response was YES. [2022-12-13 19:23:34,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345271 conditions, 26514 events. 13860/26514 cut-off events. For 1681159/1681159 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 257625 event pairs, 141 based on Foata normal form. 42/26556 useless extension candidates. Maximal degree in co-relation 339227. Up to 8050 conditions per place. [2022-12-13 19:23:34,209 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 641 selfloop transitions, 4139 changer transitions 62/4842 dead transitions. [2022-12-13 19:23:34,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 4842 transitions, 163686 flow [2022-12-13 19:23:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 19:23:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 19:23:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4211 transitions. [2022-12-13 19:23:34,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656125608137992 [2022-12-13 19:23:34,213 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4211 transitions. [2022-12-13 19:23:34,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4211 transitions. [2022-12-13 19:23:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4211 transitions. [2022-12-13 19:23:34,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 61.9264705882353) internal successors, (4211), 68 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:34,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 133.0) internal successors, (9177), 69 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:34,222 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 133.0) internal successors, (9177), 69 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:34,222 INFO L175 Difference]: Start difference. First operand has 508 places, 4055 transitions, 134243 flow. Second operand 68 states and 4211 transitions. [2022-12-13 19:23:34,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 4842 transitions, 163686 flow [2022-12-13 19:24:29,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 4842 transitions, 163288 flow, removed 157 selfloop flow, removed 5 redundant places. [2022-12-13 19:24:29,730 INFO L231 Difference]: Finished difference. Result has 582 places, 4587 transitions, 162839 flow [2022-12-13 19:24:29,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=133924, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=162839, PETRI_PLACES=582, PETRI_TRANSITIONS=4587} [2022-12-13 19:24:29,732 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2022-12-13 19:24:29,732 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 4587 transitions, 162839 flow [2022-12-13 19:24:29,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.57142857142857) internal successors, (1230), 21 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:29,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:24:29,733 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:24:29,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 19:24:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 19:24:29,934 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:24:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:24:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash 620602737, now seen corresponding path program 30 times [2022-12-13 19:24:29,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:24:29,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705138886] [2022-12-13 19:24:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:24:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:24:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:24:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:30,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:24:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705138886] [2022-12-13 19:24:30,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705138886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:24:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145036370] [2022-12-13 19:24:30,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:24:30,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:24:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:24:30,060 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:24:30,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 19:24:30,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 19:24:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:24:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:24:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:24:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:30,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:24:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:30,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145036370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:24:30,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:24:30,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-12-13 19:24:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927597209] [2022-12-13 19:24:30,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:24:30,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:24:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:24:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:24:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:24:30,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:24:30,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 4587 transitions, 162839 flow. Second operand has 22 states, 22 states have (on average 58.81818181818182) internal successors, (1294), 22 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:30,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:24:30,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:24:30,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:25:13,930 INFO L130 PetriNetUnfolder]: 14608/27708 cut-off events. [2022-12-13 19:25:13,930 INFO L131 PetriNetUnfolder]: For 2076189/2076189 co-relation queries the response was YES. [2022-12-13 19:25:14,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386846 conditions, 27708 events. 14608/27708 cut-off events. For 2076189/2076189 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 267156 event pairs, 1201 based on Foata normal form. 164/27872 useless extension candidates. Maximal degree in co-relation 385384. Up to 21988 conditions per place. [2022-12-13 19:25:14,472 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 3973 selfloop transitions, 1056 changer transitions 3/5032 dead transitions. [2022-12-13 19:25:14,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 5032 transitions, 186385 flow [2022-12-13 19:25:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:25:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:25:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1260 transitions. [2022-12-13 19:25:14,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-13 19:25:14,475 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1260 transitions. [2022-12-13 19:25:14,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1260 transitions. [2022-12-13 19:25:14,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:25:14,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1260 transitions. [2022-12-13 19:25:14,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.0) internal successors, (1260), 20 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:25:14,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 133.0) internal successors, (2793), 21 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:25:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 133.0) internal successors, (2793), 21 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:25:14,478 INFO L175 Difference]: Start difference. First operand has 582 places, 4587 transitions, 162839 flow. Second operand 20 states and 1260 transitions. [2022-12-13 19:25:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 5032 transitions, 186385 flow [2022-12-13 19:26:39,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 5032 transitions, 177258 flow, removed 3367 selfloop flow, removed 21 redundant places. [2022-12-13 19:26:39,972 INFO L231 Difference]: Finished difference. Result has 579 places, 4821 transitions, 166856 flow [2022-12-13 19:26:39,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=154749, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=166856, PETRI_PLACES=579, PETRI_TRANSITIONS=4821} [2022-12-13 19:26:39,974 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 559 predicate places. [2022-12-13 19:26:39,974 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 4821 transitions, 166856 flow [2022-12-13 19:26:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 58.81818181818182) internal successors, (1294), 22 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:39,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:26:39,975 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:26:39,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 19:26:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 19:26:40,176 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:26:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:26:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1766311437, now seen corresponding path program 31 times [2022-12-13 19:26:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:26:40,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603769716] [2022-12-13 19:26:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:26:40,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:26:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:26:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:26:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:26:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603769716] [2022-12-13 19:26:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603769716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:26:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989648502] [2022-12-13 19:26:40,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:26:40,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:26:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:26:40,269 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:26:40,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 19:26:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:26:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:26:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:26:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:26:40,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:26:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:26:40,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989648502] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:26:40,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:26:40,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 19:26:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819385258] [2022-12-13 19:26:40,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:26:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:26:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:26:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:26:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:26:40,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:26:40,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 4821 transitions, 166856 flow. Second operand has 21 states, 21 states have (on average 58.714285714285715) internal successors, (1233), 21 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:40,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:26:40,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:26:40,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:27:26,996 INFO L130 PetriNetUnfolder]: 16037/30304 cut-off events. [2022-12-13 19:27:26,996 INFO L131 PetriNetUnfolder]: For 2025375/2025375 co-relation queries the response was YES. [2022-12-13 19:27:27,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414050 conditions, 30304 events. 16037/30304 cut-off events. For 2025375/2025375 co-relation queries the response was YES. Maximal size of possible extension queue 2211. Compared 294552 event pairs, 941 based on Foata normal form. 118/30422 useless extension candidates. Maximal degree in co-relation 413370. Up to 19197 conditions per place. [2022-12-13 19:27:27,604 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 3528 selfloop transitions, 1923 changer transitions 36/5487 dead transitions. [2022-12-13 19:27:27,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 5487 transitions, 198757 flow [2022-12-13 19:27:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 19:27:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 19:27:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1702 transitions. [2022-12-13 19:27:27,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47396268448900025 [2022-12-13 19:27:27,606 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1702 transitions. [2022-12-13 19:27:27,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1702 transitions. [2022-12-13 19:27:27,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:27:27,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1702 transitions. [2022-12-13 19:27:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.03703703703704) internal successors, (1702), 27 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:27,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:27,610 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:27:27,610 INFO L175 Difference]: Start difference. First operand has 579 places, 4821 transitions, 166856 flow. Second operand 27 states and 1702 transitions. [2022-12-13 19:27:27,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 5487 transitions, 198757 flow [2022-12-13 19:28:59,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 5487 transitions, 197398 flow, removed 326 selfloop flow, removed 7 redundant places. [2022-12-13 19:28:59,338 INFO L231 Difference]: Finished difference. Result has 605 places, 5179 transitions, 186664 flow [2022-12-13 19:28:59,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=165759, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=186664, PETRI_PLACES=605, PETRI_TRANSITIONS=5179} [2022-12-13 19:28:59,340 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 585 predicate places. [2022-12-13 19:28:59,340 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 5179 transitions, 186664 flow [2022-12-13 19:28:59,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.714285714285715) internal successors, (1233), 21 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:28:59,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:28:59,341 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:28:59,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 19:28:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 19:28:59,542 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:28:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:28:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1888280163, now seen corresponding path program 32 times [2022-12-13 19:28:59,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:28:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763589704] [2022-12-13 19:28:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:28:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:28:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:28:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:28:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:28:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763589704] [2022-12-13 19:28:59,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763589704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:28:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488354798] [2022-12-13 19:28:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:28:59,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:28:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:28:59,641 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:28:59,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 19:28:59,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:28:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:28:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:28:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:28:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:28:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:28:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:28:59,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488354798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:28:59,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:28:59,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 19:28:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086017040] [2022-12-13 19:28:59,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:28:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:28:59,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:28:59,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:28:59,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:28:59,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:28:59,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 5179 transitions, 186664 flow. Second operand has 21 states, 21 states have (on average 58.57142857142857) internal successors, (1230), 21 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:28:59,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:28:59,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:28:59,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:29:54,367 INFO L130 PetriNetUnfolder]: 16894/31931 cut-off events. [2022-12-13 19:29:54,367 INFO L131 PetriNetUnfolder]: For 2317313/2317313 co-relation queries the response was YES. [2022-12-13 19:29:54,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442833 conditions, 31931 events. 16894/31931 cut-off events. For 2317313/2317313 co-relation queries the response was YES. Maximal size of possible extension queue 2343. Compared 312751 event pairs, 799 based on Foata normal form. 168/32099 useless extension candidates. Maximal degree in co-relation 442146. Up to 15798 conditions per place. [2022-12-13 19:29:55,049 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 2928 selfloop transitions, 2748 changer transitions 66/5742 dead transitions. [2022-12-13 19:29:55,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 5742 transitions, 213257 flow [2022-12-13 19:29:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 19:29:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 19:29:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2443 transitions. [2022-12-13 19:29:55,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4709851551956815 [2022-12-13 19:29:55,052 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2443 transitions. [2022-12-13 19:29:55,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2443 transitions. [2022-12-13 19:29:55,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:29:55,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2443 transitions. [2022-12-13 19:29:55,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.64102564102564) internal successors, (2443), 39 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:29:55,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 133.0) internal successors, (5320), 40 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:29:55,057 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 133.0) internal successors, (5320), 40 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:29:55,058 INFO L175 Difference]: Start difference. First operand has 605 places, 5179 transitions, 186664 flow. Second operand 39 states and 2443 transitions. [2022-12-13 19:29:55,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 5742 transitions, 213257 flow [2022-12-13 19:31:41,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 5742 transitions, 212423 flow, removed 347 selfloop flow, removed 9 redundant places. [2022-12-13 19:31:41,524 INFO L231 Difference]: Finished difference. Result has 642 places, 5426 transitions, 203635 flow [2022-12-13 19:31:41,526 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=185802, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=203635, PETRI_PLACES=642, PETRI_TRANSITIONS=5426} [2022-12-13 19:31:41,526 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2022-12-13 19:31:41,527 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 5426 transitions, 203635 flow [2022-12-13 19:31:41,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.57142857142857) internal successors, (1230), 21 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:31:41,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:31:41,527 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:31:41,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 19:31:41,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 19:31:41,727 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:31:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:31:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1651548175, now seen corresponding path program 33 times [2022-12-13 19:31:41,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:31:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819103638] [2022-12-13 19:31:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:31:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:31:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:31:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:31:41,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:31:41,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819103638] [2022-12-13 19:31:41,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819103638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:31:41,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540225320] [2022-12-13 19:31:41,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:31:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:31:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:31:41,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:31:41,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40d4c0f-ae26-460b-9e4f-0130e28e8a45/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 19:31:41,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:31:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:31:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:31:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:31:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:31:41,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:31:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:31:42,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540225320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:31:42,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:31:42,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 19:31:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755140170] [2022-12-13 19:31:42,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:31:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:31:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:31:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:31:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:31:42,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 133 [2022-12-13 19:31:42,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 5426 transitions, 203635 flow. Second operand has 21 states, 21 states have (on average 58.714285714285715) internal successors, (1233), 21 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:31:42,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:31:42,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 133 [2022-12-13 19:31:42,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand