./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-b5237d8 [2022-11-21 16:31:15,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:31:15,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:31:15,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:31:15,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:31:15,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:31:15,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:31:15,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:31:15,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:31:15,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:31:15,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:31:15,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:31:15,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:31:15,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:31:15,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:31:15,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:31:15,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:31:15,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:31:15,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:31:15,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:31:15,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:31:15,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:31:15,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:31:15,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:31:15,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:31:15,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:31:15,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:31:15,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:31:15,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:31:15,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:31:15,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:31:15,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:31:15,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:31:15,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:31:15,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:31:15,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:31:15,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:31:15,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:31:15,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:31:15,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:31:15,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:31:15,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:31:15,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:31:15,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:31:15,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:31:15,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:31:15,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:31:15,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:31:15,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:31:15,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:31:15,875 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:31:15,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:31:15,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:31:15,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:31:15,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:31:15,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:31:15,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:31:15,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:31:15,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:31:15,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:31:15,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:31:15,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:31:15,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:31:15,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:31:15,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:31:15,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:31:15,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:31:15,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:31:15,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:31:15,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:31:15,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:31:15,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:31:15,883 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:31:15,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:31:15,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:31:15,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-21 16:31:16,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:31:16,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:31:16,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:31:16,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:31:16,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:31:16,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-21 16:31:19,698 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:31:19,898 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:31:19,899 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-21 16:31:19,909 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/data/587406969/bd2a1f41514048b88a00589830d7415b/FLAGd8de76448 [2022-11-21 16:31:19,929 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/data/587406969/bd2a1f41514048b88a00589830d7415b [2022-11-21 16:31:19,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:31:19,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:31:19,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:31:19,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:31:19,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:31:19,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:31:19" (1/1) ... [2022-11-21 16:31:19,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451d2b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:19, skipping insertion in model container [2022-11-21 16:31:19,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:31:19" (1/1) ... [2022-11-21 16:31:19,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:31:19,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:31:20,207 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_67eee922-e039-4f62-a71d-45f9b723f24a/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-21 16:31:20,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:31:20,226 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:31:20,252 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_67eee922-e039-4f62-a71d-45f9b723f24a/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-21 16:31:20,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:31:20,272 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:31:20,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20 WrapperNode [2022-11-21 16:31:20,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:31:20,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:31:20,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:31:20,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:31:20,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,319 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-11-21 16:31:20,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:31:20,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:31:20,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:31:20,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:31:20,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:31:20,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:31:20,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:31:20,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:31:20,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (1/1) ... [2022-11-21 16:31:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:31:20,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:20,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:31:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:31:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:31:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:31:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:31:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:31:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:31:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:31:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:31:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:31:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:31:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:31:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:31:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:31:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:31:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:31:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:31:20,475 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:31:20,596 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:31:20,598 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:31:21,089 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:31:21,099 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:31:21,100 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:31:21,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:31:21 BoogieIcfgContainer [2022-11-21 16:31:21,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:31:21,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:31:21,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:31:21,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:31:21,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:31:19" (1/3) ... [2022-11-21 16:31:21,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e624672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:31:21, skipping insertion in model container [2022-11-21 16:31:21,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:31:20" (2/3) ... [2022-11-21 16:31:21,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e624672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:31:21, skipping insertion in model container [2022-11-21 16:31:21,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:31:21" (3/3) ... [2022-11-21 16:31:21,120 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-11-21 16:31:21,131 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:31:21,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:31:21,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:31:21,145 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:31:21,279 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:31:21,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-11-21 16:31:21,538 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-11-21 16:31:21,539 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:31:21,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 15/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 192 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-21 16:31:21,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 184 transitions, 392 flow [2022-11-21 16:31:21,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 170 transitions, 358 flow [2022-11-21 16:31:21,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:31:21,574 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;@1d754820, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:31:21,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:31:21,623 INFO L130 PetriNetUnfolder]: 15/169 cut-off events. [2022-11-21 16:31:21,624 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:31:21,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:21,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:21,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 406210709, now seen corresponding path program 1 times [2022-11-21 16:31:21,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:21,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408601574] [2022-11-21 16:31:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408601574] [2022-11-21 16:31:22,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408601574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:31:22,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:31:22,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:31:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458595202] [2022-11-21 16:31:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:31:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:22,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:31:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:31:22,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 184 [2022-11-21 16:31:22,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 170 transitions, 358 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:22,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:22,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 184 [2022-11-21 16:31:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:22,175 INFO L130 PetriNetUnfolder]: 7/162 cut-off events. [2022-11-21 16:31:22,175 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-21 16:31:22,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 162 events. 7/162 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 14/165 useless extension candidates. Maximal degree in co-relation 130. Up to 7 conditions per place. [2022-11-21 16:31:22,181 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 6 selfloop transitions, 0 changer transitions 4/162 dead transitions. [2022-11-21 16:31:22,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 162 transitions, 354 flow [2022-11-21 16:31:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:31:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:31:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-11-21 16:31:22,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2022-11-21 16:31:22,211 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-11-21 16:31:22,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-11-21 16:31:22,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:22,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-11-21 16:31:22,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:22,242 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:22,244 INFO L175 Difference]: Start difference. First operand has 165 places, 170 transitions, 358 flow. Second operand 2 states and 352 transitions. [2022-11-21 16:31:22,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 162 transitions, 354 flow [2022-11-21 16:31:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 342 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-21 16:31:22,260 INFO L231 Difference]: Finished difference. Result has 160 places, 158 transitions, 322 flow [2022-11-21 16:31:22,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=160, PETRI_TRANSITIONS=158} [2022-11-21 16:31:22,270 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, -5 predicate places. [2022-11-21 16:31:22,270 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 158 transitions, 322 flow [2022-11-21 16:31:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:22,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:22,272 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:22,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:31:22,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash -597888393, now seen corresponding path program 1 times [2022-11-21 16:31:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118204689] [2022-11-21 16:31:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:23,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118204689] [2022-11-21 16:31:23,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118204689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:31:23,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:31:23,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:31:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327587763] [2022-11-21 16:31:23,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:31:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:31:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:31:23,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 184 [2022-11-21 16:31:23,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 158 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 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) [2022-11-21 16:31:23,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:23,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 184 [2022-11-21 16:31:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:23,683 INFO L130 PetriNetUnfolder]: 175/665 cut-off events. [2022-11-21 16:31:23,683 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-21 16:31:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 665 events. 175/665 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3322 event pairs, 74 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 917. Up to 225 conditions per place. [2022-11-21 16:31:23,696 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 41 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-11-21 16:31:23,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 440 flow [2022-11-21 16:31:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:31:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:31:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1076 transitions. [2022-11-21 16:31:23,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7309782608695652 [2022-11-21 16:31:23,703 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1076 transitions. [2022-11-21 16:31:23,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1076 transitions. [2022-11-21 16:31:23,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:23,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1076 transitions. [2022-11-21 16:31:23,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:23,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:23,716 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:23,717 INFO L175 Difference]: Start difference. First operand has 160 places, 158 transitions, 322 flow. Second operand 8 states and 1076 transitions. [2022-11-21 16:31:23,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 440 flow [2022-11-21 16:31:23,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:31:23,726 INFO L231 Difference]: Finished difference. Result has 167 places, 159 transitions, 350 flow [2022-11-21 16:31:23,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=167, PETRI_TRANSITIONS=159} [2022-11-21 16:31:23,727 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-11-21 16:31:23,728 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 159 transitions, 350 flow [2022-11-21 16:31:23,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 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) [2022-11-21 16:31:23,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:23,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:23,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:31:23,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1889566339, now seen corresponding path program 1 times [2022-11-21 16:31:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:23,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211448235] [2022-11-21 16:31:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211448235] [2022-11-21 16:31:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211448235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:31:24,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:31:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:31:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077236601] [2022-11-21 16:31:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:31:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:31:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:31:24,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 184 [2022-11-21 16:31:24,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 159 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:24,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:24,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 184 [2022-11-21 16:31:24,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:25,068 INFO L130 PetriNetUnfolder]: 224/1098 cut-off events. [2022-11-21 16:31:25,068 INFO L131 PetriNetUnfolder]: For 45/46 co-relation queries the response was YES. [2022-11-21 16:31:25,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 1098 events. 224/1098 cut-off events. For 45/46 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7286 event pairs, 34 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 1450. Up to 149 conditions per place. [2022-11-21 16:31:25,084 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 62 selfloop transitions, 9 changer transitions 4/200 dead transitions. [2022-11-21 16:31:25,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 200 transitions, 594 flow [2022-11-21 16:31:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:31:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:31:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2022-11-21 16:31:25,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2022-11-21 16:31:25,089 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2022-11-21 16:31:25,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2022-11-21 16:31:25,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:25,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2022-11-21 16:31:25,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,099 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,100 INFO L175 Difference]: Start difference. First operand has 167 places, 159 transitions, 350 flow. Second operand 7 states and 1035 transitions. [2022-11-21 16:31:25,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 200 transitions, 594 flow [2022-11-21 16:31:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 200 transitions, 576 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-21 16:31:25,111 INFO L231 Difference]: Finished difference. Result has 168 places, 165 transitions, 385 flow [2022-11-21 16:31:25,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=168, PETRI_TRANSITIONS=165} [2022-11-21 16:31:25,113 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-11-21 16:31:25,114 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 165 transitions, 385 flow [2022-11-21 16:31:25,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:25,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:25,115 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:25,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:31:25,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash -933576923, now seen corresponding path program 1 times [2022-11-21 16:31:25,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:25,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829443857] [2022-11-21 16:31:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829443857] [2022-11-21 16:31:25,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829443857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:25,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111920172] [2022-11-21 16:31:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:25,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:25,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:31:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:31:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:25,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:26,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111920172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:26,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:26,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:31:26,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376160818] [2022-11-21 16:31:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:31:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:31:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:31:26,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-21 16:31:26,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 165 transitions, 385 flow. Second operand has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:26,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:26,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-21 16:31:26,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:26,837 INFO L130 PetriNetUnfolder]: 270/1248 cut-off events. [2022-11-21 16:31:26,837 INFO L131 PetriNetUnfolder]: For 81/90 co-relation queries the response was YES. [2022-11-21 16:31:26,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1248 events. 270/1248 cut-off events. For 81/90 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8252 event pairs, 103 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 1815. Up to 188 conditions per place. [2022-11-21 16:31:26,852 INFO L137 encePairwiseOnDemand]: 171/184 looper letters, 46 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2022-11-21 16:31:26,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 193 transitions, 575 flow [2022-11-21 16:31:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:31:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:31:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1933 transitions. [2022-11-21 16:31:26,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8081103678929766 [2022-11-21 16:31:26,862 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1933 transitions. [2022-11-21 16:31:26,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1933 transitions. [2022-11-21 16:31:26,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:26,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1933 transitions. [2022-11-21 16:31:26,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 148.69230769230768) internal successors, (1933), 13 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:26,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:26,875 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:26,875 INFO L175 Difference]: Start difference. First operand has 168 places, 165 transitions, 385 flow. Second operand 13 states and 1933 transitions. [2022-11-21 16:31:26,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 193 transitions, 575 flow [2022-11-21 16:31:26,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 193 transitions, 571 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-21 16:31:26,882 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 457 flow [2022-11-21 16:31:26,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=457, PETRI_PLACES=182, PETRI_TRANSITIONS=172} [2022-11-21 16:31:26,885 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 17 predicate places. [2022-11-21 16:31:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 457 flow [2022-11-21 16:31:26,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:26,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:26,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:26,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:27,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:27,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2061525029, now seen corresponding path program 1 times [2022-11-21 16:31:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:27,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615745364] [2022-11-21 16:31:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:27,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615745364] [2022-11-21 16:31:27,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615745364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:31:27,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:31:27,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:31:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73596107] [2022-11-21 16:31:27,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:27,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:31:27,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:31:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:31:27,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-21 16:31:27,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 172 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:27,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-21 16:31:27,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:27,528 INFO L130 PetriNetUnfolder]: 106/711 cut-off events. [2022-11-21 16:31:27,528 INFO L131 PetriNetUnfolder]: For 94/116 co-relation queries the response was YES. [2022-11-21 16:31:27,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 711 events. 106/711 cut-off events. For 94/116 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3852 event pairs, 7 based on Foata normal form. 7/658 useless extension candidates. Maximal degree in co-relation 1056. Up to 104 conditions per place. [2022-11-21 16:31:27,540 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 22 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-11-21 16:31:27,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 557 flow [2022-11-21 16:31:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:31:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:31:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 829 transitions. [2022-11-21 16:31:27,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010869565217391 [2022-11-21 16:31:27,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 829 transitions. [2022-11-21 16:31:27,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 829 transitions. [2022-11-21 16:31:27,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:27,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 829 transitions. [2022-11-21 16:31:27,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,551 INFO L175 Difference]: Start difference. First operand has 182 places, 172 transitions, 457 flow. Second operand 5 states and 829 transitions. [2022-11-21 16:31:27,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 557 flow [2022-11-21 16:31:27,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 542 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-21 16:31:27,558 INFO L231 Difference]: Finished difference. Result has 185 places, 176 transitions, 492 flow [2022-11-21 16:31:27,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=185, PETRI_TRANSITIONS=176} [2022-11-21 16:31:27,559 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 20 predicate places. [2022-11-21 16:31:27,560 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 176 transitions, 492 flow [2022-11-21 16:31:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:27,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:27,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:31:27,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1140785363, now seen corresponding path program 1 times [2022-11-21 16:31:27,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:27,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186653033] [2022-11-21 16:31:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:27,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186653033] [2022-11-21 16:31:27,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186653033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:31:27,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:31:27,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:31:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369441171] [2022-11-21 16:31:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:27,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:31:27,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:31:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:31:27,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-21 16:31:27,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 176 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:27,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:27,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-21 16:31:27,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:28,048 INFO L130 PetriNetUnfolder]: 142/851 cut-off events. [2022-11-21 16:31:28,048 INFO L131 PetriNetUnfolder]: For 216/254 co-relation queries the response was YES. [2022-11-21 16:31:28,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 851 events. 142/851 cut-off events. For 216/254 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5136 event pairs, 11 based on Foata normal form. 3/792 useless extension candidates. Maximal degree in co-relation 1329. Up to 158 conditions per place. [2022-11-21 16:31:28,061 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 21 selfloop transitions, 7 changer transitions 0/188 dead transitions. [2022-11-21 16:31:28,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 188 transitions, 583 flow [2022-11-21 16:31:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:31:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:31:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 828 transitions. [2022-11-21 16:31:28,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-21 16:31:28,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 828 transitions. [2022-11-21 16:31:28,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 828 transitions. [2022-11-21 16:31:28,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:28,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 828 transitions. [2022-11-21 16:31:28,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:28,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:28,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:28,072 INFO L175 Difference]: Start difference. First operand has 185 places, 176 transitions, 492 flow. Second operand 5 states and 828 transitions. [2022-11-21 16:31:28,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 188 transitions, 583 flow [2022-11-21 16:31:28,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:31:28,079 INFO L231 Difference]: Finished difference. Result has 192 places, 180 transitions, 536 flow [2022-11-21 16:31:28,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=192, PETRI_TRANSITIONS=180} [2022-11-21 16:31:28,081 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 27 predicate places. [2022-11-21 16:31:28,081 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 180 transitions, 536 flow [2022-11-21 16:31:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:28,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:28,082 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:28,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:31:28,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1289800445, now seen corresponding path program 1 times [2022-11-21 16:31:28,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119644494] [2022-11-21 16:31:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119644494] [2022-11-21 16:31:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119644494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33072724] [2022-11-21 16:31:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:28,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:31:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:31:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:29,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:29,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33072724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:29,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:29,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-21 16:31:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022680329] [2022-11-21 16:31:29,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:29,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:31:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:31:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:31:29,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 184 [2022-11-21 16:31:29,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 180 transitions, 536 flow. Second operand has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:29,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:29,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 184 [2022-11-21 16:31:29,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:32,507 INFO L130 PetriNetUnfolder]: 1389/4440 cut-off events. [2022-11-21 16:31:32,508 INFO L131 PetriNetUnfolder]: For 1388/1450 co-relation queries the response was YES. [2022-11-21 16:31:32,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 4440 events. 1389/4440 cut-off events. For 1388/1450 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 40310 event pairs, 871 based on Foata normal form. 33/3994 useless extension candidates. Maximal degree in co-relation 8815. Up to 1413 conditions per place. [2022-11-21 16:31:32,559 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 71 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2022-11-21 16:31:32,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 216 transitions, 815 flow [2022-11-21 16:31:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:31:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 16:31:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2411 transitions. [2022-11-21 16:31:32,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6896453089244852 [2022-11-21 16:31:32,568 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2411 transitions. [2022-11-21 16:31:32,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2411 transitions. [2022-11-21 16:31:32,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:32,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2411 transitions. [2022-11-21 16:31:32,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.89473684210526) internal successors, (2411), 19 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:32,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:32,587 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:32,587 INFO L175 Difference]: Start difference. First operand has 192 places, 180 transitions, 536 flow. Second operand 19 states and 2411 transitions. [2022-11-21 16:31:32,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 216 transitions, 815 flow [2022-11-21 16:31:32,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 216 transitions, 815 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:31:32,603 INFO L231 Difference]: Finished difference. Result has 217 places, 187 transitions, 627 flow [2022-11-21 16:31:32,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=627, PETRI_PLACES=217, PETRI_TRANSITIONS=187} [2022-11-21 16:31:32,605 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 52 predicate places. [2022-11-21 16:31:32,605 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 187 transitions, 627 flow [2022-11-21 16:31:32,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:32,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:32,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:32,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:31:32,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -942074776, now seen corresponding path program 1 times [2022-11-21 16:31:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:32,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337309638] [2022-11-21 16:31:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:33,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337309638] [2022-11-21 16:31:33,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337309638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669622557] [2022-11-21 16:31:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:33,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:33,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:33,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:31:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:31:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:34,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669622557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:34,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:34,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-21 16:31:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344035806] [2022-11-21 16:31:34,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:34,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:31:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:31:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:31:34,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 184 [2022-11-21 16:31:34,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 187 transitions, 627 flow. Second operand has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:34,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:34,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 184 [2022-11-21 16:31:34,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:36,660 INFO L130 PetriNetUnfolder]: 1000/2883 cut-off events. [2022-11-21 16:31:36,661 INFO L131 PetriNetUnfolder]: For 1379/1436 co-relation queries the response was YES. [2022-11-21 16:31:36,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 2883 events. 1000/2883 cut-off events. For 1379/1436 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 23388 event pairs, 690 based on Foata normal form. 23/2631 useless extension candidates. Maximal degree in co-relation 6518. Up to 1174 conditions per place. [2022-11-21 16:31:36,701 INFO L137 encePairwiseOnDemand]: 167/184 looper letters, 50 selfloop transitions, 13 changer transitions 21/208 dead transitions. [2022-11-21 16:31:36,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 208 transitions, 853 flow [2022-11-21 16:31:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:31:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-21 16:31:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2174 transitions. [2022-11-21 16:31:36,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6950127877237852 [2022-11-21 16:31:36,709 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2174 transitions. [2022-11-21 16:31:36,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2174 transitions. [2022-11-21 16:31:36,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:36,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2174 transitions. [2022-11-21 16:31:36,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:36,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:36,727 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:36,727 INFO L175 Difference]: Start difference. First operand has 217 places, 187 transitions, 627 flow. Second operand 17 states and 2174 transitions. [2022-11-21 16:31:36,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 208 transitions, 853 flow [2022-11-21 16:31:36,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 208 transitions, 827 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-21 16:31:36,740 INFO L231 Difference]: Finished difference. Result has 223 places, 177 transitions, 573 flow [2022-11-21 16:31:36,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=573, PETRI_PLACES=223, PETRI_TRANSITIONS=177} [2022-11-21 16:31:36,745 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 58 predicate places. [2022-11-21 16:31:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 177 transitions, 573 flow [2022-11-21 16:31:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:36,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:36,767 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:36,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:31:36,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:36,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash 931953981, now seen corresponding path program 2 times [2022-11-21 16:31:36,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:36,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107600653] [2022-11-21 16:31:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:36,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:37,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107600653] [2022-11-21 16:31:37,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107600653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:37,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663936888] [2022-11-21 16:31:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:31:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:37,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:37,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:31:37,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:31:37,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:31:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663936888] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:38,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:31:38,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-21 16:31:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789491835] [2022-11-21 16:31:38,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:38,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:31:38,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:31:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:31:38,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-21 16:31:38,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 177 transitions, 573 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:38,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:38,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-21 16:31:38,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:40,497 INFO L130 PetriNetUnfolder]: 2643/6400 cut-off events. [2022-11-21 16:31:40,497 INFO L131 PetriNetUnfolder]: For 2904/2917 co-relation queries the response was YES. [2022-11-21 16:31:40,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 6400 events. 2643/6400 cut-off events. For 2904/2917 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 57853 event pairs, 617 based on Foata normal form. 13/6193 useless extension candidates. Maximal degree in co-relation 14708. Up to 1153 conditions per place. [2022-11-21 16:31:40,577 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 82 selfloop transitions, 20 changer transitions 0/234 dead transitions. [2022-11-21 16:31:40,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 234 transitions, 960 flow [2022-11-21 16:31:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:31:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:31:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1992 transitions. [2022-11-21 16:31:40,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7732919254658385 [2022-11-21 16:31:40,585 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1992 transitions. [2022-11-21 16:31:40,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1992 transitions. [2022-11-21 16:31:40,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:40,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1992 transitions. [2022-11-21 16:31:40,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.28571428571428) internal successors, (1992), 14 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:40,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:40,599 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:40,600 INFO L175 Difference]: Start difference. First operand has 223 places, 177 transitions, 573 flow. Second operand 14 states and 1992 transitions. [2022-11-21 16:31:40,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 234 transitions, 960 flow [2022-11-21 16:31:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 886 flow, removed 23 selfloop flow, removed 19 redundant places. [2022-11-21 16:31:40,646 INFO L231 Difference]: Finished difference. Result has 210 places, 189 transitions, 636 flow [2022-11-21 16:31:40,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=636, PETRI_PLACES=210, PETRI_TRANSITIONS=189} [2022-11-21 16:31:40,648 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 45 predicate places. [2022-11-21 16:31:40,648 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 189 transitions, 636 flow [2022-11-21 16:31:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:40,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:40,650 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:40,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:40,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:40,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2100281099, now seen corresponding path program 3 times [2022-11-21 16:31:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187043164] [2022-11-21 16:31:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:41,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:41,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187043164] [2022-11-21 16:31:41,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187043164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:41,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143456778] [2022-11-21 16:31:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:31:41,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:41,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:41,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:41,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:31:41,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:31:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:31:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:31:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:31:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143456778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:41,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:41,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-11-21 16:31:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032245040] [2022-11-21 16:31:41,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:31:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:31:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:31:41,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-21 16:31:41,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 189 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:41,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:41,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-21 16:31:41,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:47,838 INFO L130 PetriNetUnfolder]: 8766/20056 cut-off events. [2022-11-21 16:31:47,838 INFO L131 PetriNetUnfolder]: For 11149/11266 co-relation queries the response was YES. [2022-11-21 16:31:47,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46484 conditions, 20056 events. 8766/20056 cut-off events. For 11149/11266 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 203712 event pairs, 731 based on Foata normal form. 80/19763 useless extension candidates. Maximal degree in co-relation 46461. Up to 1539 conditions per place. [2022-11-21 16:31:48,071 INFO L137 encePairwiseOnDemand]: 165/184 looper letters, 265 selfloop transitions, 92 changer transitions 0/484 dead transitions. [2022-11-21 16:31:48,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 484 transitions, 2300 flow [2022-11-21 16:31:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:31:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-21 16:31:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3847 transitions. [2022-11-21 16:31:48,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7743558776167472 [2022-11-21 16:31:48,085 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3847 transitions. [2022-11-21 16:31:48,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3847 transitions. [2022-11-21 16:31:48,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:48,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3847 transitions. [2022-11-21 16:31:48,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 142.4814814814815) internal successors, (3847), 27 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:48,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:48,118 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:48,119 INFO L175 Difference]: Start difference. First operand has 210 places, 189 transitions, 636 flow. Second operand 27 states and 3847 transitions. [2022-11-21 16:31:48,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 484 transitions, 2300 flow [2022-11-21 16:31:48,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 2287 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-21 16:31:48,509 INFO L231 Difference]: Finished difference. Result has 248 places, 270 transitions, 1403 flow [2022-11-21 16:31:48,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1403, PETRI_PLACES=248, PETRI_TRANSITIONS=270} [2022-11-21 16:31:48,510 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 83 predicate places. [2022-11-21 16:31:48,511 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 270 transitions, 1403 flow [2022-11-21 16:31:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:48,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:48,513 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:48,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:31:48,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 504300449, now seen corresponding path program 4 times [2022-11-21 16:31:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321014116] [2022-11-21 16:31:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321014116] [2022-11-21 16:31:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321014116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133944307] [2022-11-21 16:31:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:31:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:49,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:49,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:31:49,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:31:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:31:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:49,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:31:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133944307] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:50,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:31:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-21 16:31:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012254018] [2022-11-21 16:31:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:31:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:31:50,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:31:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:31:50,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-21 16:31:50,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 270 transitions, 1403 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:50,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:50,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-21 16:31:50,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:53,628 INFO L130 PetriNetUnfolder]: 4783/12514 cut-off events. [2022-11-21 16:31:53,629 INFO L131 PetriNetUnfolder]: For 36741/37742 co-relation queries the response was YES. [2022-11-21 16:31:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 12514 events. 4783/12514 cut-off events. For 36741/37742 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 125771 event pairs, 826 based on Foata normal form. 83/12284 useless extension candidates. Maximal degree in co-relation 37604. Up to 2974 conditions per place. [2022-11-21 16:31:53,780 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 110 selfloop transitions, 94 changer transitions 0/353 dead transitions. [2022-11-21 16:31:53,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 2460 flow [2022-11-21 16:31:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:31:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:31:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1982 transitions. [2022-11-21 16:31:53,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7694099378881988 [2022-11-21 16:31:53,785 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1982 transitions. [2022-11-21 16:31:53,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1982 transitions. [2022-11-21 16:31:53,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:31:53,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1982 transitions. [2022-11-21 16:31:53,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 141.57142857142858) internal successors, (1982), 14 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:53,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:53,797 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:53,797 INFO L175 Difference]: Start difference. First operand has 248 places, 270 transitions, 1403 flow. Second operand 14 states and 1982 transitions. [2022-11-21 16:31:53,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 2460 flow [2022-11-21 16:31:54,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 353 transitions, 2411 flow, removed 16 selfloop flow, removed 9 redundant places. [2022-11-21 16:31:54,180 INFO L231 Difference]: Finished difference. Result has 258 places, 305 transitions, 2045 flow [2022-11-21 16:31:54,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2045, PETRI_PLACES=258, PETRI_TRANSITIONS=305} [2022-11-21 16:31:54,181 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 93 predicate places. [2022-11-21 16:31:54,182 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 305 transitions, 2045 flow [2022-11-21 16:31:54,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:54,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:31:54,183 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:54,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 16:31:54,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:31:54,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:31:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1770658561, now seen corresponding path program 5 times [2022-11-21 16:31:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:31:54,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600302068] [2022-11-21 16:31:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:31:54,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:31:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:31:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:31:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:31:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600302068] [2022-11-21 16:31:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600302068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:54,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441543423] [2022-11-21 16:31:54,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:31:54,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:31:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:31:54,726 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:31:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:31:54,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 16:31:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:55,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:31:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:31:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:31:55,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441543423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:31:55,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:31:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 16:31:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908341468] [2022-11-21 16:31:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:31:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:31:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:31:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:31:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:31:55,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-21 16:31:55,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 305 transitions, 2045 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:31:55,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:31:55,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-21 16:31:55,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:32:02,385 INFO L130 PetriNetUnfolder]: 10040/23203 cut-off events. [2022-11-21 16:32:02,386 INFO L131 PetriNetUnfolder]: For 88979/89185 co-relation queries the response was YES. [2022-11-21 16:32:02,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75614 conditions, 23203 events. 10040/23203 cut-off events. For 88979/89185 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 241979 event pairs, 901 based on Foata normal form. 154/22960 useless extension candidates. Maximal degree in co-relation 75569. Up to 2099 conditions per place. [2022-11-21 16:32:02,707 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 282 selfloop transitions, 185 changer transitions 0/594 dead transitions. [2022-11-21 16:32:02,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 594 transitions, 4695 flow [2022-11-21 16:32:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:32:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-21 16:32:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4129 transitions. [2022-11-21 16:32:02,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738005997001499 [2022-11-21 16:32:02,729 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4129 transitions. [2022-11-21 16:32:02,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4129 transitions. [2022-11-21 16:32:02,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:32:02,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4129 transitions. [2022-11-21 16:32:02,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 142.3793103448276) internal successors, (4129), 29 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:02,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:02,767 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:02,767 INFO L175 Difference]: Start difference. First operand has 258 places, 305 transitions, 2045 flow. Second operand 29 states and 4129 transitions. [2022-11-21 16:32:02,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 594 transitions, 4695 flow [2022-11-21 16:32:04,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 594 transitions, 4658 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-11-21 16:32:04,135 INFO L231 Difference]: Finished difference. Result has 291 places, 370 transitions, 3204 flow [2022-11-21 16:32:04,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3204, PETRI_PLACES=291, PETRI_TRANSITIONS=370} [2022-11-21 16:32:04,137 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 126 predicate places. [2022-11-21 16:32:04,137 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 370 transitions, 3204 flow [2022-11-21 16:32:04,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:04,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:32:04,139 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:04,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:32:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:32:04,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:32:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:04,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1298897347, now seen corresponding path program 6 times [2022-11-21 16:32:04,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:04,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739015508] [2022-11-21 16:32:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:04,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739015508] [2022-11-21 16:32:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739015508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567035139] [2022-11-21 16:32:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:32:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:32:04,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:32:04,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:32:05,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 16:32:05,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:32:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:32:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:32:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:05,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:32:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567035139] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:05,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:32:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 24 [2022-11-21 16:32:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318690625] [2022-11-21 16:32:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:32:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:32:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:32:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:32:05,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-21 16:32:05,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 370 transitions, 3204 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:05,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:32:05,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-21 16:32:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:32:09,537 INFO L130 PetriNetUnfolder]: 5605/14248 cut-off events. [2022-11-21 16:32:09,537 INFO L131 PetriNetUnfolder]: For 75084/76650 co-relation queries the response was YES. [2022-11-21 16:32:09,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51970 conditions, 14248 events. 5605/14248 cut-off events. For 75084/76650 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 145095 event pairs, 909 based on Foata normal form. 185/14021 useless extension candidates. Maximal degree in co-relation 51913. Up to 4853 conditions per place. [2022-11-21 16:32:09,713 INFO L137 encePairwiseOnDemand]: 168/184 looper letters, 145 selfloop transitions, 113 changer transitions 0/425 dead transitions. [2022-11-21 16:32:09,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 4220 flow [2022-11-21 16:32:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:32:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:32:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1851 transitions. [2022-11-21 16:32:09,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738294314381271 [2022-11-21 16:32:09,720 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1851 transitions. [2022-11-21 16:32:09,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1851 transitions. [2022-11-21 16:32:09,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:32:09,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1851 transitions. [2022-11-21 16:32:09,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.3846153846154) internal successors, (1851), 13 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:09,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:09,734 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:09,734 INFO L175 Difference]: Start difference. First operand has 291 places, 370 transitions, 3204 flow. Second operand 13 states and 1851 transitions. [2022-11-21 16:32:09,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 4220 flow [2022-11-21 16:32:10,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 425 transitions, 4098 flow, removed 20 selfloop flow, removed 10 redundant places. [2022-11-21 16:32:10,422 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 3636 flow [2022-11-21 16:32:10,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3636, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2022-11-21 16:32:10,424 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 131 predicate places. [2022-11-21 16:32:10,424 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 3636 flow [2022-11-21 16:32:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:10,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:32:10,426 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:10,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 16:32:10,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:32:10,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:32:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 290812645, now seen corresponding path program 7 times [2022-11-21 16:32:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:10,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072387633] [2022-11-21 16:32:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:10,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072387633] [2022-11-21 16:32:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072387633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629726112] [2022-11-21 16:32:10,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:32:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:32:10,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:32:11,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:32:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:11,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:32:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:32:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:11,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:32:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629726112] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:11,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:32:11,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 25 [2022-11-21 16:32:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953840997] [2022-11-21 16:32:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:32:11,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:32:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:32:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:32:11,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-21 16:32:11,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 3636 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:11,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:32:11,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-21 16:32:11,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:32:15,972 INFO L130 PetriNetUnfolder]: 5528/14207 cut-off events. [2022-11-21 16:32:15,972 INFO L131 PetriNetUnfolder]: For 82683/84654 co-relation queries the response was YES. [2022-11-21 16:32:16,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52813 conditions, 14207 events. 5528/14207 cut-off events. For 82683/84654 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 144649 event pairs, 631 based on Foata normal form. 165/13982 useless extension candidates. Maximal degree in co-relation 52753. Up to 3822 conditions per place. [2022-11-21 16:32:16,146 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 122 selfloop transitions, 131 changer transitions 0/420 dead transitions. [2022-11-21 16:32:16,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 420 transitions, 4463 flow [2022-11-21 16:32:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:32:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:32:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1846 transitions. [2022-11-21 16:32:16,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2022-11-21 16:32:16,151 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1846 transitions. [2022-11-21 16:32:16,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1846 transitions. [2022-11-21 16:32:16,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:32:16,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1846 transitions. [2022-11-21 16:32:16,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:16,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:16,163 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:16,163 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 3636 flow. Second operand 13 states and 1846 transitions. [2022-11-21 16:32:16,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 420 transitions, 4463 flow [2022-11-21 16:32:16,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 4333 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-21 16:32:16,958 INFO L231 Difference]: Finished difference. Result has 302 places, 384 transitions, 4000 flow [2022-11-21 16:32:16,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4000, PETRI_PLACES=302, PETRI_TRANSITIONS=384} [2022-11-21 16:32:16,960 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 137 predicate places. [2022-11-21 16:32:16,960 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 384 transitions, 4000 flow [2022-11-21 16:32:16,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:16,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:32:16,961 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:16,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:32:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:32:17,168 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:32:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1806969854, now seen corresponding path program 2 times [2022-11-21 16:32:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:17,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885238938] [2022-11-21 16:32:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:17,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885238938] [2022-11-21 16:32:17,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885238938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538801672] [2022-11-21 16:32:17,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:32:17,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:32:17,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:32:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:32:17,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:32:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:32:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:32:17,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:32:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:18,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:32:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:32:18,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538801672] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:18,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:32:18,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-11-21 16:32:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757367642] [2022-11-21 16:32:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:32:18,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:32:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:32:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:32:18,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-21 16:32:18,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 384 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:18,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:32:18,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-21 16:32:18,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:32:20,424 INFO L130 PetriNetUnfolder]: 1391/5136 cut-off events. [2022-11-21 16:32:20,424 INFO L131 PetriNetUnfolder]: For 42985/45261 co-relation queries the response was YES. [2022-11-21 16:32:20,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18665 conditions, 5136 events. 1391/5136 cut-off events. For 42985/45261 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 49128 event pairs, 228 based on Foata normal form. 299/5105 useless extension candidates. Maximal degree in co-relation 18603. Up to 841 conditions per place. [2022-11-21 16:32:20,501 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 136 selfloop transitions, 45 changer transitions 0/432 dead transitions. [2022-11-21 16:32:20,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 432 transitions, 5078 flow [2022-11-21 16:32:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:32:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:32:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1483 transitions. [2022-11-21 16:32:20,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059782608695653 [2022-11-21 16:32:20,504 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1483 transitions. [2022-11-21 16:32:20,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1483 transitions. [2022-11-21 16:32:20,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:32:20,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1483 transitions. [2022-11-21 16:32:20,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:20,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:20,513 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:20,513 INFO L175 Difference]: Start difference. First operand has 302 places, 384 transitions, 4000 flow. Second operand 10 states and 1483 transitions. [2022-11-21 16:32:20,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 432 transitions, 5078 flow [2022-11-21 16:32:20,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 432 transitions, 4845 flow, removed 37 selfloop flow, removed 13 redundant places. [2022-11-21 16:32:20,707 INFO L231 Difference]: Finished difference. Result has 299 places, 384 transitions, 3926 flow [2022-11-21 16:32:20,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3926, PETRI_PLACES=299, PETRI_TRANSITIONS=384} [2022-11-21 16:32:20,708 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 134 predicate places. [2022-11-21 16:32:20,708 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 384 transitions, 3926 flow [2022-11-21 16:32:20,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:20,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:32:20,710 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:20,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:32:20,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:32:20,910 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:32:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash 367328972, now seen corresponding path program 1 times [2022-11-21 16:32:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976412320] [2022-11-21 16:32:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:32:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976412320] [2022-11-21 16:32:21,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976412320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:32:21,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:32:21,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:32:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536627464] [2022-11-21 16:32:21,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:32:21,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:32:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:32:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:32:21,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-21 16:32:21,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 384 transitions, 3926 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:21,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:32:21,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-21 16:32:21,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:32:22,325 INFO L130 PetriNetUnfolder]: 1033/4612 cut-off events. [2022-11-21 16:32:22,326 INFO L131 PetriNetUnfolder]: For 25449/26173 co-relation queries the response was YES. [2022-11-21 16:32:22,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15557 conditions, 4612 events. 1033/4612 cut-off events. For 25449/26173 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 44298 event pairs, 49 based on Foata normal form. 124/4638 useless extension candidates. Maximal degree in co-relation 15498. Up to 308 conditions per place. [2022-11-21 16:32:22,374 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 31 selfloop transitions, 8 changer transitions 0/401 dead transitions. [2022-11-21 16:32:22,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 401 transitions, 4120 flow [2022-11-21 16:32:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:32:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:32:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2022-11-21 16:32:22,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978260869565218 [2022-11-21 16:32:22,377 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2022-11-21 16:32:22,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2022-11-21 16:32:22,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:32:22,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2022-11-21 16:32:22,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:22,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:22,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:22,379 INFO L175 Difference]: Start difference. First operand has 299 places, 384 transitions, 3926 flow. Second operand 5 states and 826 transitions. [2022-11-21 16:32:22,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 401 transitions, 4120 flow [2022-11-21 16:32:22,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 401 transitions, 4067 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-21 16:32:22,535 INFO L231 Difference]: Finished difference. Result has 298 places, 387 transitions, 3915 flow [2022-11-21 16:32:22,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3915, PETRI_PLACES=298, PETRI_TRANSITIONS=387} [2022-11-21 16:32:22,536 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 133 predicate places. [2022-11-21 16:32:22,536 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 387 transitions, 3915 flow [2022-11-21 16:32:22,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:22,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:32:22,537 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:32:22,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:32:22,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:32:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:32:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash -118570075, now seen corresponding path program 1 times [2022-11-21 16:32:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:32:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003470712] [2022-11-21 16:32:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:32:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:32:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:32:27,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003470712] [2022-11-21 16:32:27,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003470712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:32:27,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143313986] [2022-11-21 16:32:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:32:27,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:32:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:32:27,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:32:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67eee922-e039-4f62-a71d-45f9b723f24a/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:32:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:32:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-21 16:32:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:32:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:32:30,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:30,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2022-11-21 16:32:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:32,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:32:36,572 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-21 16:32:36,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 43 [2022-11-21 16:32:36,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:36,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2022-11-21 16:32:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:32:38,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143313986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:32:38,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:32:38,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 35, 31] total 84 [2022-11-21 16:32:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234693185] [2022-11-21 16:32:38,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:32:38,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-21 16:32:38,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:32:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-21 16:32:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=6374, Unknown=0, NotChecked=0, Total=6972 [2022-11-21 16:32:38,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 184 [2022-11-21 16:32:38,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 387 transitions, 3915 flow. Second operand has 84 states, 84 states have (on average 73.98809523809524) internal successors, (6215), 84 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:32:38,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:32:38,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 184 [2022-11-21 16:32:38,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand