./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-5e519f3 [2022-11-02 21:08:09,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:09,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:09,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:09,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:09,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:09,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:09,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:09,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:09,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:09,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:09,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:09,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:09,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:09,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:09,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:09,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:09,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:09,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:09,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:09,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:09,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:09,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:09,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:09,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:09,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:09,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:09,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:09,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:09,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:09,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:09,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:09,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:09,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:09,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:09,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:09,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:09,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:09,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:09,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:09,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:09,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:08:09,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:09,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:09,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:09,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:09,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:09,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:09,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:09,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:09,914 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:09,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:09,916 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:09,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:09,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:09,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:09,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:08:09,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:09,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:08:09,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:09,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:08:09,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:09,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:08:09,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:09,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:09,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:09,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:09,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:09,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:09,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:08:09,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:08:09,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:08:09,924 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:08:09,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:08:09,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:08:09,925 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_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-02 21:08:10,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:10,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:10,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:10,387 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:10,388 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:10,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-02 21:08:10,481 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/data/c02bbd0d9/9c11238ddb9b4eeb92baba9cb0533021/FLAGcd9bf5312 [2022-11-02 21:08:11,087 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:11,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-02 21:08:11,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/data/c02bbd0d9/9c11238ddb9b4eeb92baba9cb0533021/FLAGcd9bf5312 [2022-11-02 21:08:11,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/data/c02bbd0d9/9c11238ddb9b4eeb92baba9cb0533021 [2022-11-02 21:08:11,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:11,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:11,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:11,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:11,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:11,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c509d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11, skipping insertion in model container [2022-11-02 21:08:11,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:11,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:11,720 WARN L230 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_d81cce73-e73b-4074-b50f-7e96e86ee733/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-02 21:08:11,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:11,736 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:11,778 WARN L230 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_d81cce73-e73b-4074-b50f-7e96e86ee733/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-02 21:08:11,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:11,809 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:11,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11 WrapperNode [2022-11-02 21:08:11,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:11,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:11,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:11,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:11,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,856 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-11-02 21:08:11,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:11,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:11,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:11,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:11,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:11,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:11,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:11,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:11,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (1/1) ... [2022-11-02 21:08:11,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:11,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:11,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:11,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:11,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 21:08:11,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 21:08:11,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 21:08:11,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 21:08:11,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:08:11,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:08:12,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:08:12,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:08:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:08:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:12,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:08:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:08:12,003 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 21:08:12,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:12,224 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:12,475 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:12,585 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:12,586 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:08:12,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:12 BoogieIcfgContainer [2022-11-02 21:08:12,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:12,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:12,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:12,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:12,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:11" (1/3) ... [2022-11-02 21:08:12,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc9c7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:12, skipping insertion in model container [2022-11-02 21:08:12,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:11" (2/3) ... [2022-11-02 21:08:12,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc9c7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:12, skipping insertion in model container [2022-11-02 21:08:12,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:12" (3/3) ... [2022-11-02 21:08:12,612 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-02 21:08:12,623 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:08:12,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:12,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:08:12,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:08:12,783 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 21:08:12,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-11-02 21:08:12,958 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-11-02 21:08:12,959 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:08:12,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-02 21:08:12,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-11-02 21:08:12,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-11-02 21:08:12,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:12,990 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;@632c88d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:12,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 21:08:13,020 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2022-11-02 21:08:13,020 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:08:13,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:13,021 INFO L208 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] [2022-11-02 21:08:13,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1062414046, now seen corresponding path program 1 times [2022-11-02 21:08:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114933866] [2022-11-02 21:08:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:13,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:13,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114933866] [2022-11-02 21:08:13,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114933866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:13,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:13,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:08:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042581368] [2022-11-02 21:08:13,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:13,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:08:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:08:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:08:13,516 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-11-02 21:08:13,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:13,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:13,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-11-02 21:08:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:13,599 INFO L130 PetriNetUnfolder]: 10/97 cut-off events. [2022-11-02 21:08:13,600 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-02 21:08:13,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-02 21:08:13,602 INFO L137 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-11-02 21:08:13,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-11-02 21:08:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:08:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 21:08:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-11-02 21:08:13,625 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-11-02 21:08:13,626 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-11-02 21:08:13,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-11-02 21:08:13,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:13,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-11-02 21:08:13,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:13,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:13,652 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:13,655 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-11-02 21:08:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-11-02 21:08:13,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 21:08:13,671 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-11-02 21:08:13,673 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-11-02 21:08:13,677 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-11-02 21:08:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-11-02 21:08:13,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:13,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:13,679 INFO L208 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] [2022-11-02 21:08:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:08:13,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-11-02 21:08:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085551532] [2022-11-02 21:08:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:14,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085551532] [2022-11-02 21:08:14,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085551532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:14,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:14,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:08:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618118361] [2022-11-02 21:08:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:08:14,425 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-11-02 21:08:14,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:14,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:14,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-11-02 21:08:14,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:14,623 INFO L130 PetriNetUnfolder]: 62/188 cut-off events. [2022-11-02 21:08:14,623 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 21:08:14,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-11-02 21:08:14,629 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-11-02 21:08:14,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-11-02 21:08:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:08:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:08:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-11-02 21:08:14,641 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-11-02 21:08:14,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-11-02 21:08:14,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-11-02 21:08:14,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:14,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-11-02 21:08:14,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:14,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:14,649 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:14,649 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-11-02 21:08:14,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-11-02 21:08:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:08:14,653 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-11-02 21:08:14,653 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-11-02 21:08:14,654 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-11-02 21:08:14,655 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-11-02 21:08:14,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:14,656 INFO L208 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] [2022-11-02 21:08:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:08:14,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 31782083, now seen corresponding path program 1 times [2022-11-02 21:08:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622900131] [2022-11-02 21:08:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:08:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622900131] [2022-11-02 21:08:15,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622900131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:15,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:15,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:08:15,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849681555] [2022-11-02 21:08:15,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:15,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:08:15,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:08:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:08:15,031 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-11-02 21:08:15,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:15,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:15,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-11-02 21:08:15,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:15,226 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-02 21:08:15,226 INFO L131 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-11-02 21:08:15,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 524 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-11-02 21:08:15,232 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-02 21:08:15,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-11-02 21:08:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:08:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:08:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-11-02 21:08:15,237 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-11-02 21:08:15,237 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-11-02 21:08:15,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-11-02 21:08:15,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:15,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-11-02 21:08:15,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:15,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:15,247 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:15,247 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-11-02 21:08:15,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-11-02 21:08:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 21:08:15,253 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-11-02 21:08:15,254 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-02 21:08:15,258 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-11-02 21:08:15,258 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-11-02 21:08:15,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:15,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:15,260 INFO L208 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] [2022-11-02 21:08:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:08:15,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-11-02 21:08:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:15,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777836030] [2022-11-02 21:08:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:15,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777836030] [2022-11-02 21:08:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777836030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691507642] [2022-11-02 21:08:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:16,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:16,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:16,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:16,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:08:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:08:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:17,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691507642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:17,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:08:17,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630453786] [2022-11-02 21:08:17,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:08:17,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:08:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:08:17,818 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:17,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:17,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:17,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:17,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:21,907 INFO L130 PetriNetUnfolder]: 258/823 cut-off events. [2022-11-02 21:08:21,907 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-02 21:08:21,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4950 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-11-02 21:08:21,919 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-11-02 21:08:21,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-11-02 21:08:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 21:08:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-02 21:08:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-11-02 21:08:21,934 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-11-02 21:08:21,934 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-11-02 21:08:21,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-11-02 21:08:21,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:21,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-11-02 21:08:21,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:21,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:21,977 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:21,977 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-11-02 21:08:21,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-11-02 21:08:21,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 21:08:21,997 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-11-02 21:08:21,997 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-11-02 21:08:21,999 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-11-02 21:08:21,999 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-11-02 21:08:22,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:22,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:22,001 INFO L208 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] [2022-11-02 21:08:22,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:22,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:22,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-11-02 21:08:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221825589] [2022-11-02 21:08:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:22,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221825589] [2022-11-02 21:08:22,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221825589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:22,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200645929] [2022-11-02 21:08:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:08:22,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:22,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:08:22,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:08:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:08:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:23,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200645929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:24,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:24,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-02 21:08:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796015873] [2022-11-02 21:08:24,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:08:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:08:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:08:24,415 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:24,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:24,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:24,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:24,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:30,808 INFO L130 PetriNetUnfolder]: 452/1591 cut-off events. [2022-11-02 21:08:30,808 INFO L131 PetriNetUnfolder]: For 3920/3920 co-relation queries the response was YES. [2022-11-02 21:08:30,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5255 conditions, 1591 events. 452/1591 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12002 event pairs, 43 based on Foata normal form. 9/1595 useless extension candidates. Maximal degree in co-relation 5219. Up to 381 conditions per place. [2022-11-02 21:08:30,831 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-11-02 21:08:30,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-11-02 21:08:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-02 21:08:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-02 21:08:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-11-02 21:08:30,844 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-11-02 21:08:30,844 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-11-02 21:08:30,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-11-02 21:08:30,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:30,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-11-02 21:08:30,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:30,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:30,882 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:30,882 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-11-02 21:08:30,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-11-02 21:08:30,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-11-02 21:08:30,936 INFO L231 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-11-02 21:08:30,937 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-11-02 21:08:30,938 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-11-02 21:08:30,938 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-11-02 21:08:30,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:30,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:30,940 INFO L208 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] [2022-11-02 21:08:30,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:31,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 48036111, now seen corresponding path program 3 times [2022-11-02 21:08:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274926225] [2022-11-02 21:08:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274926225] [2022-11-02 21:08:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274926225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305478749] [2022-11-02 21:08:31,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:08:31,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:31,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:31,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:31,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:08:31,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:08:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:08:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:32,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:33,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305478749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:33,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:33,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:08:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668117355] [2022-11-02 21:08:33,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:33,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:08:33,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:08:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:08:33,147 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:33,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:33,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:33,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:33,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:38,249 INFO L130 PetriNetUnfolder]: 490/1649 cut-off events. [2022-11-02 21:08:38,250 INFO L131 PetriNetUnfolder]: For 15402/15402 co-relation queries the response was YES. [2022-11-02 21:08:38,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7787 conditions, 1649 events. 490/1649 cut-off events. For 15402/15402 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12412 event pairs, 17 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 7716. Up to 315 conditions per place. [2022-11-02 21:08:38,277 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-11-02 21:08:38,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-11-02 21:08:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-02 21:08:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-02 21:08:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-11-02 21:08:38,286 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-11-02 21:08:38,286 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-11-02 21:08:38,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-11-02 21:08:38,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:38,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-11-02 21:08:38,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:38,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:38,315 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:38,315 INFO L175 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-11-02 21:08:38,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-11-02 21:08:38,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-11-02 21:08:38,441 INFO L231 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-11-02 21:08:38,442 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-11-02 21:08:38,443 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-11-02 21:08:38,443 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-11-02 21:08:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:38,444 INFO L208 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] [2022-11-02 21:08:38,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:08:38,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-11-02 21:08:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078659829] [2022-11-02 21:08:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:39,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078659829] [2022-11-02 21:08:39,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078659829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112809857] [2022-11-02 21:08:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:08:39,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:39,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:39,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:08:39,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:08:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:08:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:39,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:40,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112809857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:40,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:40,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:08:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402520089] [2022-11-02 21:08:40,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:40,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:08:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:08:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:08:40,312 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:40,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:40,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:40,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:40,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:45,636 INFO L130 PetriNetUnfolder]: 650/2184 cut-off events. [2022-11-02 21:08:45,637 INFO L131 PetriNetUnfolder]: For 24785/24785 co-relation queries the response was YES. [2022-11-02 21:08:45,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11475 conditions, 2184 events. 650/2184 cut-off events. For 24785/24785 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17617 event pairs, 24 based on Foata normal form. 3/2184 useless extension candidates. Maximal degree in co-relation 11399. Up to 427 conditions per place. [2022-11-02 21:08:45,688 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-11-02 21:08:45,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-11-02 21:08:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-02 21:08:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-02 21:08:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-11-02 21:08:45,707 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-11-02 21:08:45,707 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-11-02 21:08:45,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-11-02 21:08:45,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:45,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-11-02 21:08:45,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:45,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:45,766 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:45,767 INFO L175 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-11-02 21:08:45,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-11-02 21:08:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-11-02 21:08:46,000 INFO L231 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-11-02 21:08:46,000 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-11-02 21:08:46,001 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-11-02 21:08:46,001 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-11-02 21:08:46,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:46,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:46,003 INFO L208 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] [2022-11-02 21:08:46,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:08:46,273 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1745646075, now seen corresponding path program 5 times [2022-11-02 21:08:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133076272] [2022-11-02 21:08:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:46,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133076272] [2022-11-02 21:08:46,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133076272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463237194] [2022-11-02 21:08:46,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:08:46,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:46,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:46,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:08:46,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:08:46,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:08:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:47,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:48,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463237194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:48,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:48,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:08:48,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610922086] [2022-11-02 21:08:48,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:48,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:08:48,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:08:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:08:48,280 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:48,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:48,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:48,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:48,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:54,660 INFO L130 PetriNetUnfolder]: 665/2215 cut-off events. [2022-11-02 21:08:54,661 INFO L131 PetriNetUnfolder]: For 37591/37591 co-relation queries the response was YES. [2022-11-02 21:08:54,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13149 conditions, 2215 events. 665/2215 cut-off events. For 37591/37591 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17909 event pairs, 28 based on Foata normal form. 5/2216 useless extension candidates. Maximal degree in co-relation 13054. Up to 425 conditions per place. [2022-11-02 21:08:54,708 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-11-02 21:08:54,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-11-02 21:08:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-02 21:08:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-02 21:08:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-11-02 21:08:54,719 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-11-02 21:08:54,719 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-11-02 21:08:54,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-11-02 21:08:54,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:54,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-11-02 21:08:54,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:54,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:54,747 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:54,747 INFO L175 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-11-02 21:08:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-11-02 21:08:55,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-11-02 21:08:55,108 INFO L231 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-11-02 21:08:55,109 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-11-02 21:08:55,110 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-11-02 21:08:55,110 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-11-02 21:08:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:55,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:55,111 INFO L208 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] [2022-11-02 21:08:55,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:55,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-11-02 21:08:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:55,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255404902] [2022-11-02 21:08:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:55,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255404902] [2022-11-02 21:08:55,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255404902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939490017] [2022-11-02 21:08:55,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:08:55,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:55,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:55,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:08:55,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:08:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:55,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 21:08:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:56,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939490017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:57,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:57,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-11-02 21:08:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194487584] [2022-11-02 21:08:57,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:08:57,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:08:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:08:57,918 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:08:57,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:57,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:57,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:08:57,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:02,811 INFO L130 PetriNetUnfolder]: 887/2908 cut-off events. [2022-11-02 21:09:02,811 INFO L131 PetriNetUnfolder]: For 49715/49715 co-relation queries the response was YES. [2022-11-02 21:09:02,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18202 conditions, 2908 events. 887/2908 cut-off events. For 49715/49715 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25278 event pairs, 35 based on Foata normal form. 2/2901 useless extension candidates. Maximal degree in co-relation 18096. Up to 777 conditions per place. [2022-11-02 21:09:02,886 INFO L137 encePairwiseOnDemand]: 66/86 looper letters, 296 selfloop transitions, 714 changer transitions 36/1087 dead transitions. [2022-11-02 21:09:02,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1087 transitions, 16485 flow [2022-11-02 21:09:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 21:09:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-02 21:09:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3501 transitions. [2022-11-02 21:09:02,892 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6360828488372093 [2022-11-02 21:09:02,892 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3501 transitions. [2022-11-02 21:09:02,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3501 transitions. [2022-11-02 21:09:02,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:02,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3501 transitions. [2022-11-02 21:09:02,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.703125) internal successors, (3501), 64 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:02,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:02,911 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:02,911 INFO L175 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 64 states and 3501 transitions. [2022-11-02 21:09:02,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1087 transitions, 16485 flow [2022-11-02 21:09:03,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1087 transitions, 15330 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-11-02 21:09:03,341 INFO L231 Difference]: Finished difference. Result has 468 places, 971 transitions, 14134 flow [2022-11-02 21:09:03,342 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=14134, PETRI_PLACES=468, PETRI_TRANSITIONS=971} [2022-11-02 21:09:03,343 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 392 predicate places. [2022-11-02 21:09:03,343 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 971 transitions, 14134 flow [2022-11-02 21:09:03,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:03,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:03,344 INFO L208 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] [2022-11-02 21:09:03,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 21:09:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 21:09:03,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 7 times [2022-11-02 21:09:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787299063] [2022-11-02 21:09:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:04,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787299063] [2022-11-02 21:09:04,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787299063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848519192] [2022-11-02 21:09:04,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:09:04,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:04,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:04,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:04,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:09:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:04,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:04,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848519192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:05,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:05,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725818008] [2022-11-02 21:09:05,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:05,430 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:05,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 971 transitions, 14134 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:05,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:05,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:10,785 INFO L130 PetriNetUnfolder]: 947/3126 cut-off events. [2022-11-02 21:09:10,785 INFO L131 PetriNetUnfolder]: For 58844/58844 co-relation queries the response was YES. [2022-11-02 21:09:10,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21448 conditions, 3126 events. 947/3126 cut-off events. For 58844/58844 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27557 event pairs, 53 based on Foata normal form. 2/3122 useless extension candidates. Maximal degree in co-relation 21331. Up to 950 conditions per place. [2022-11-02 21:09:10,838 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 330 selfloop transitions, 852 changer transitions 12/1235 dead transitions. [2022-11-02 21:09:10,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1235 transitions, 21050 flow [2022-11-02 21:09:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 21:09:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-02 21:09:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-11-02 21:09:10,844 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-11-02 21:09:10,845 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-11-02 21:09:10,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-11-02 21:09:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:10,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-11-02 21:09:10,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:10,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:10,863 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:10,863 INFO L175 Difference]: Start difference. First operand has 468 places, 971 transitions, 14134 flow. Second operand 68 states and 3758 transitions. [2022-11-02 21:09:10,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1235 transitions, 21050 flow [2022-11-02 21:09:11,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1235 transitions, 20056 flow, removed 335 selfloop flow, removed 27 redundant places. [2022-11-02 21:09:11,770 INFO L231 Difference]: Finished difference. Result has 521 places, 1131 transitions, 19020 flow [2022-11-02 21:09:11,772 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=19020, PETRI_PLACES=521, PETRI_TRANSITIONS=1131} [2022-11-02 21:09:11,773 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 445 predicate places. [2022-11-02 21:09:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1131 transitions, 19020 flow [2022-11-02 21:09:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:11,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:11,774 INFO L208 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] [2022-11-02 21:09:11,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-02 21:09:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:11,978 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2064802447, now seen corresponding path program 8 times [2022-11-02 21:09:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975524015] [2022-11-02 21:09:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975524015] [2022-11-02 21:09:12,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975524015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964965548] [2022-11-02 21:09:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:12,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:12,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:09:12,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:13,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:13,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964965548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:13,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200221491] [2022-11-02 21:09:13,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:13,698 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:13,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1131 transitions, 19020 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:13,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:13,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:13,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:18,423 INFO L130 PetriNetUnfolder]: 947/3113 cut-off events. [2022-11-02 21:09:18,423 INFO L131 PetriNetUnfolder]: For 71290/71290 co-relation queries the response was YES. [2022-11-02 21:09:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22564 conditions, 3113 events. 947/3113 cut-off events. For 71290/71290 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 27428 event pairs, 66 based on Foata normal form. 2/3111 useless extension candidates. Maximal degree in co-relation 22444. Up to 905 conditions per place. [2022-11-02 21:09:18,482 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 391 selfloop transitions, 776 changer transitions 14/1222 dead transitions. [2022-11-02 21:09:18,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1222 transitions, 22967 flow [2022-11-02 21:09:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-02 21:09:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-02 21:09:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3416 transitions. [2022-11-02 21:09:18,488 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6406601650412603 [2022-11-02 21:09:18,488 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3416 transitions. [2022-11-02 21:09:18,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3416 transitions. [2022-11-02 21:09:18,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:18,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3416 transitions. [2022-11-02 21:09:18,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.096774193548384) internal successors, (3416), 62 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:18,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:18,504 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:18,505 INFO L175 Difference]: Start difference. First operand has 521 places, 1131 transitions, 19020 flow. Second operand 62 states and 3416 transitions. [2022-11-02 21:09:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1222 transitions, 22967 flow [2022-11-02 21:09:19,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1222 transitions, 21899 flow, removed 243 selfloop flow, removed 36 redundant places. [2022-11-02 21:09:19,470 INFO L231 Difference]: Finished difference. Result has 550 places, 1141 transitions, 19828 flow [2022-11-02 21:09:19,471 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18007, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=19828, PETRI_PLACES=550, PETRI_TRANSITIONS=1141} [2022-11-02 21:09:19,472 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 474 predicate places. [2022-11-02 21:09:19,472 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1141 transitions, 19828 flow [2022-11-02 21:09:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:19,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:19,473 INFO L208 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] [2022-11-02 21:09:19,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:19,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -335085921, now seen corresponding path program 9 times [2022-11-02 21:09:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478546666] [2022-11-02 21:09:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478546666] [2022-11-02 21:09:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478546666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830616932] [2022-11-02 21:09:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:09:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:20,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:20,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:09:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:09:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:20,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:21,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830616932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:21,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:21,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:21,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415909723] [2022-11-02 21:09:21,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:21,285 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:21,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1141 transitions, 19828 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:21,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:21,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:21,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:25,091 INFO L130 PetriNetUnfolder]: 1014/3283 cut-off events. [2022-11-02 21:09:25,092 INFO L131 PetriNetUnfolder]: For 75222/75222 co-relation queries the response was YES. [2022-11-02 21:09:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24750 conditions, 3283 events. 1014/3283 cut-off events. For 75222/75222 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 29049 event pairs, 68 based on Foata normal form. 1/3275 useless extension candidates. Maximal degree in co-relation 24627. Up to 1420 conditions per place. [2022-11-02 21:09:25,144 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 731 changer transitions 6/1312 dead transitions. [2022-11-02 21:09:25,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1312 transitions, 25324 flow [2022-11-02 21:09:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 21:09:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-02 21:09:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2311 transitions. [2022-11-02 21:09:25,148 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6398117386489479 [2022-11-02 21:09:25,149 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2311 transitions. [2022-11-02 21:09:25,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2311 transitions. [2022-11-02 21:09:25,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:25,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2311 transitions. [2022-11-02 21:09:25,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.023809523809526) internal successors, (2311), 42 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:25,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:25,158 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:25,158 INFO L175 Difference]: Start difference. First operand has 550 places, 1141 transitions, 19828 flow. Second operand 42 states and 2311 transitions. [2022-11-02 21:09:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1312 transitions, 25324 flow [2022-11-02 21:09:25,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1312 transitions, 24867 flow, removed 45 selfloop flow, removed 33 redundant places. [2022-11-02 21:09:25,973 INFO L231 Difference]: Finished difference. Result has 567 places, 1256 transitions, 24144 flow [2022-11-02 21:09:25,975 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=19445, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=24144, PETRI_PLACES=567, PETRI_TRANSITIONS=1256} [2022-11-02 21:09:25,976 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 491 predicate places. [2022-11-02 21:09:25,976 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1256 transitions, 24144 flow [2022-11-02 21:09:25,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:25,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:25,977 INFO L208 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] [2022-11-02 21:09:25,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 21:09:26,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:26,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1276571101, now seen corresponding path program 10 times [2022-11-02 21:09:26,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:26,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582239137] [2022-11-02 21:09:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:26,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:26,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582239137] [2022-11-02 21:09:26,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582239137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111448134] [2022-11-02 21:09:26,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:09:26,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:26,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:26,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:26,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:09:26,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:09:26,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:26,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:27,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111448134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:27,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:27,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:27,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446700095] [2022-11-02 21:09:27,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:27,635 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:27,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1256 transitions, 24144 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:27,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:27,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:32,369 INFO L130 PetriNetUnfolder]: 1050/3393 cut-off events. [2022-11-02 21:09:32,369 INFO L131 PetriNetUnfolder]: For 83985/83985 co-relation queries the response was YES. [2022-11-02 21:09:32,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27504 conditions, 3393 events. 1050/3393 cut-off events. For 83985/83985 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30334 event pairs, 65 based on Foata normal form. 1/3387 useless extension candidates. Maximal degree in co-relation 27374. Up to 1333 conditions per place. [2022-11-02 21:09:32,419 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 469 selfloop transitions, 870 changer transitions 6/1386 dead transitions. [2022-11-02 21:09:32,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1386 transitions, 29401 flow [2022-11-02 21:09:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 21:09:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-02 21:09:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2809 transitions. [2022-11-02 21:09:32,424 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6404468764249887 [2022-11-02 21:09:32,424 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2809 transitions. [2022-11-02 21:09:32,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2809 transitions. [2022-11-02 21:09:32,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:32,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2809 transitions. [2022-11-02 21:09:32,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.07843137254902) internal successors, (2809), 51 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:32,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:32,436 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:32,436 INFO L175 Difference]: Start difference. First operand has 567 places, 1256 transitions, 24144 flow. Second operand 51 states and 2809 transitions. [2022-11-02 21:09:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1386 transitions, 29401 flow [2022-11-02 21:09:33,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1386 transitions, 29251 flow, removed 56 selfloop flow, removed 9 redundant places. [2022-11-02 21:09:33,475 INFO L231 Difference]: Finished difference. Result has 617 places, 1314 transitions, 27516 flow [2022-11-02 21:09:33,477 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24014, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=27516, PETRI_PLACES=617, PETRI_TRANSITIONS=1314} [2022-11-02 21:09:33,478 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 541 predicate places. [2022-11-02 21:09:33,478 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1314 transitions, 27516 flow [2022-11-02 21:09:33,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:33,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:33,479 INFO L208 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] [2022-11-02 21:09:33,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:33,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:09:33,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1429222919, now seen corresponding path program 11 times [2022-11-02 21:09:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765421803] [2022-11-02 21:09:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:34,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765421803] [2022-11-02 21:09:34,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765421803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509203909] [2022-11-02 21:09:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:09:34,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:34,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:34,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:09:34,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:09:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:34,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509203909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:35,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:35,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772739740] [2022-11-02 21:09:35,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:35,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:35,292 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:35,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1314 transitions, 27516 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:35,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:35,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:35,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:38,604 INFO L130 PetriNetUnfolder]: 1082/3483 cut-off events. [2022-11-02 21:09:38,604 INFO L131 PetriNetUnfolder]: For 98323/98323 co-relation queries the response was YES. [2022-11-02 21:09:38,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30331 conditions, 3483 events. 1082/3483 cut-off events. For 98323/98323 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 31314 event pairs, 75 based on Foata normal form. 1/3474 useless extension candidates. Maximal degree in co-relation 30191. Up to 1479 conditions per place. [2022-11-02 21:09:38,654 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 591 selfloop transitions, 833 changer transitions 6/1471 dead transitions. [2022-11-02 21:09:38,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1471 transitions, 33511 flow [2022-11-02 21:09:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 21:09:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 21:09:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2022-11-02 21:09:38,657 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6457122093023255 [2022-11-02 21:09:38,657 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2022-11-02 21:09:38,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2022-11-02 21:09:38,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:38,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2022-11-02 21:09:38,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:38,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 86.0) internal successors, (2838), 33 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:38,664 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 86.0) internal successors, (2838), 33 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:38,664 INFO L175 Difference]: Start difference. First operand has 617 places, 1314 transitions, 27516 flow. Second operand 32 states and 1777 transitions. [2022-11-02 21:09:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1471 transitions, 33511 flow [2022-11-02 21:09:39,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1471 transitions, 32945 flow, removed 118 selfloop flow, removed 30 redundant places. [2022-11-02 21:09:39,746 INFO L231 Difference]: Finished difference. Result has 631 places, 1391 transitions, 31941 flow [2022-11-02 21:09:39,748 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26987, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=31941, PETRI_PLACES=631, PETRI_TRANSITIONS=1391} [2022-11-02 21:09:39,748 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 555 predicate places. [2022-11-02 21:09:39,749 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 1391 transitions, 31941 flow [2022-11-02 21:09:39,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:39,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:39,749 INFO L208 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] [2022-11-02 21:09:39,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:09:39,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1679895921, now seen corresponding path program 12 times [2022-11-02 21:09:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191248596] [2022-11-02 21:09:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:40,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191248596] [2022-11-02 21:09:40,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191248596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016274409] [2022-11-02 21:09:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:09:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:40,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:40,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:09:40,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 21:09:40,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:40,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016274409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:41,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:41,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155550468] [2022-11-02 21:09:41,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:41,518 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:41,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 1391 transitions, 31941 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:41,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:41,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:46,809 INFO L130 PetriNetUnfolder]: 1082/3497 cut-off events. [2022-11-02 21:09:46,809 INFO L131 PetriNetUnfolder]: For 106432/106432 co-relation queries the response was YES. [2022-11-02 21:09:46,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32297 conditions, 3497 events. 1082/3497 cut-off events. For 106432/106432 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 31533 event pairs, 74 based on Foata normal form. 1/3491 useless extension candidates. Maximal degree in co-relation 32144. Up to 1304 conditions per place. [2022-11-02 21:09:46,881 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 611 selfloop transitions, 812 changer transitions 8/1472 dead transitions. [2022-11-02 21:09:46,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 1472 transitions, 36173 flow [2022-11-02 21:09:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 21:09:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-02 21:09:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-11-02 21:09:46,886 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-11-02 21:09:46,886 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-11-02 21:09:46,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-11-02 21:09:46,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:46,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-11-02 21:09:46,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:46,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:46,897 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:46,897 INFO L175 Difference]: Start difference. First operand has 631 places, 1391 transitions, 31941 flow. Second operand 49 states and 2688 transitions. [2022-11-02 21:09:46,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 1472 transitions, 36173 flow [2022-11-02 21:09:48,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 1472 transitions, 35985 flow, removed 38 selfloop flow, removed 13 redundant places. [2022-11-02 21:09:48,713 INFO L231 Difference]: Finished difference. Result has 669 places, 1397 transitions, 33622 flow [2022-11-02 21:09:48,714 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31781, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33622, PETRI_PLACES=669, PETRI_TRANSITIONS=1397} [2022-11-02 21:09:48,715 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 593 predicate places. [2022-11-02 21:09:48,715 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 1397 transitions, 33622 flow [2022-11-02 21:09:48,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:48,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:48,716 INFO L208 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] [2022-11-02 21:09:48,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:09:48,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1764815239, now seen corresponding path program 13 times [2022-11-02 21:09:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:48,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984258390] [2022-11-02 21:09:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:49,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984258390] [2022-11-02 21:09:49,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984258390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:49,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772210000] [2022-11-02 21:09:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:09:49,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:49,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:49,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:09:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:50,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772210000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:50,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:50,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659836900] [2022-11-02 21:09:50,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:50,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:50,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:50,404 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:50,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1397 transitions, 33622 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:50,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:50,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:55,970 INFO L130 PetriNetUnfolder]: 1101/3571 cut-off events. [2022-11-02 21:09:55,970 INFO L131 PetriNetUnfolder]: For 114143/114143 co-relation queries the response was YES. [2022-11-02 21:09:56,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34227 conditions, 3571 events. 1101/3571 cut-off events. For 114143/114143 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 32491 event pairs, 68 based on Foata normal form. 2/3566 useless extension candidates. Maximal degree in co-relation 34071. Up to 1532 conditions per place. [2022-11-02 21:09:56,033 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 612 selfloop transitions, 880 changer transitions 12/1545 dead transitions. [2022-11-02 21:09:56,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 1545 transitions, 39669 flow [2022-11-02 21:09:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 21:09:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-02 21:09:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2845 transitions. [2022-11-02 21:09:56,038 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.636180679785331 [2022-11-02 21:09:56,038 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2845 transitions. [2022-11-02 21:09:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2845 transitions. [2022-11-02 21:09:56,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:56,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2845 transitions. [2022-11-02 21:09:56,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.71153846153846) internal successors, (2845), 52 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,048 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,048 INFO L175 Difference]: Start difference. First operand has 669 places, 1397 transitions, 33622 flow. Second operand 52 states and 2845 transitions. [2022-11-02 21:09:56,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 1545 transitions, 39669 flow [2022-11-02 21:09:57,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 1545 transitions, 39016 flow, removed 37 selfloop flow, removed 33 redundant places. [2022-11-02 21:09:57,528 INFO L231 Difference]: Finished difference. Result has 700 places, 1467 transitions, 37818 flow [2022-11-02 21:09:57,530 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33050, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=37818, PETRI_PLACES=700, PETRI_TRANSITIONS=1467} [2022-11-02 21:09:57,531 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 624 predicate places. [2022-11-02 21:09:57,531 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 1467 transitions, 37818 flow [2022-11-02 21:09:57,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:57,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:57,532 INFO L208 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] [2022-11-02 21:09:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:57,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:09:57,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1868004661, now seen corresponding path program 14 times [2022-11-02 21:09:57,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170342363] [2022-11-02 21:09:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:58,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170342363] [2022-11-02 21:09:58,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170342363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:58,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334202266] [2022-11-02 21:09:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:58,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:58,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:58,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:58,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:09:58,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:09:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:58,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334202266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:59,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:09:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956195977] [2022-11-02 21:09:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:09:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:09:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:09:59,055 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:09:59,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 1467 transitions, 37818 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:59,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:59,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:09:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:10:04,924 INFO L130 PetriNetUnfolder]: 1136/3675 cut-off events. [2022-11-02 21:10:04,924 INFO L131 PetriNetUnfolder]: For 131619/131619 co-relation queries the response was YES. [2022-11-02 21:10:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37480 conditions, 3675 events. 1136/3675 cut-off events. For 131619/131619 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33691 event pairs, 65 based on Foata normal form. 1/3668 useless extension candidates. Maximal degree in co-relation 37314. Up to 1431 conditions per place. [2022-11-02 21:10:05,120 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 537 selfloop transitions, 1031 changer transitions 6/1615 dead transitions. [2022-11-02 21:10:05,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 1615 transitions, 44342 flow [2022-11-02 21:10:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-02 21:10:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-02 21:10:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3189 transitions. [2022-11-02 21:10:05,125 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6393344025661588 [2022-11-02 21:10:05,125 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3189 transitions. [2022-11-02 21:10:05,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3189 transitions. [2022-11-02 21:10:05,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:10:05,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3189 transitions. [2022-11-02 21:10:05,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.98275862068966) internal successors, (3189), 58 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:05,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:05,137 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:05,137 INFO L175 Difference]: Start difference. First operand has 700 places, 1467 transitions, 37818 flow. Second operand 58 states and 3189 transitions. [2022-11-02 21:10:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 1615 transitions, 44342 flow [2022-11-02 21:10:06,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1615 transitions, 43632 flow, removed 142 selfloop flow, removed 28 redundant places. [2022-11-02 21:10:06,816 INFO L231 Difference]: Finished difference. Result has 738 places, 1530 transitions, 41420 flow [2022-11-02 21:10:06,817 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=37185, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=41420, PETRI_PLACES=738, PETRI_TRANSITIONS=1530} [2022-11-02 21:10:06,818 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 662 predicate places. [2022-11-02 21:10:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 1530 transitions, 41420 flow [2022-11-02 21:10:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:06,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:06,818 INFO L208 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] [2022-11-02 21:10:06,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:10:07,019 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:10:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1522398115, now seen corresponding path program 15 times [2022-11-02 21:10:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538973546] [2022-11-02 21:10:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538973546] [2022-11-02 21:10:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538973546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205041442] [2022-11-02 21:10:07,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:10:07,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:07,554 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:07,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:10:07,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:10:07,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:10:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:08,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:08,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205041442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:08,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:08,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-02 21:10:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046306205] [2022-11-02 21:10:08,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:10:08,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:10:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:10:08,600 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:10:08,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 1530 transitions, 41420 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:08,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:10:08,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:10:08,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:10:13,846 INFO L130 PetriNetUnfolder]: 1136/3671 cut-off events. [2022-11-02 21:10:13,846 INFO L131 PetriNetUnfolder]: For 147290/147290 co-relation queries the response was YES. [2022-11-02 21:10:13,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39007 conditions, 3671 events. 1136/3671 cut-off events. For 147290/147290 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 33565 event pairs, 73 based on Foata normal form. 1/3664 useless extension candidates. Maximal degree in co-relation 38834. Up to 1333 conditions per place. [2022-11-02 21:10:13,971 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 666 selfloop transitions, 889 changer transitions 8/1604 dead transitions. [2022-11-02 21:10:13,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 1604 transitions, 45905 flow [2022-11-02 21:10:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 21:10:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-02 21:10:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2370 transitions. [2022-11-02 21:10:13,974 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6408869659275284 [2022-11-02 21:10:13,974 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2370 transitions. [2022-11-02 21:10:13,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2370 transitions. [2022-11-02 21:10:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:10:13,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2370 transitions. [2022-11-02 21:10:13,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.116279069767444) internal successors, (2370), 43 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:13,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:13,981 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:13,982 INFO L175 Difference]: Start difference. First operand has 738 places, 1530 transitions, 41420 flow. Second operand 43 states and 2370 transitions. [2022-11-02 21:10:13,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 1604 transitions, 45905 flow [2022-11-02 21:10:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 1604 transitions, 44442 flow, removed 194 selfloop flow, removed 28 redundant places. [2022-11-02 21:10:16,584 INFO L231 Difference]: Finished difference. Result has 753 places, 1537 transitions, 41949 flow [2022-11-02 21:10:16,586 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=39972, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=41949, PETRI_PLACES=753, PETRI_TRANSITIONS=1537} [2022-11-02 21:10:16,586 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 677 predicate places. [2022-11-02 21:10:16,586 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 1537 transitions, 41949 flow [2022-11-02 21:10:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:16,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:16,587 INFO L208 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] [2022-11-02 21:10:16,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-02 21:10:16,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:16,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:10:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 125081973, now seen corresponding path program 16 times [2022-11-02 21:10:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:16,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788573527] [2022-11-02 21:10:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788573527] [2022-11-02 21:10:16,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788573527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338594140] [2022-11-02 21:10:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:10:16,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:16,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:16,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 21:10:16,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:10:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:10:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:17,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338594140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:17,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:17,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-02 21:10:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478207491] [2022-11-02 21:10:17,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:10:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:10:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:10:17,149 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-11-02 21:10:17,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 1537 transitions, 41949 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:17,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:10:17,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-11-02 21:10:17,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:10:19,797 INFO L130 PetriNetUnfolder]: 1056/3378 cut-off events. [2022-11-02 21:10:19,797 INFO L131 PetriNetUnfolder]: For 139631/139803 co-relation queries the response was YES. [2022-11-02 21:10:19,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35672 conditions, 3378 events. 1056/3378 cut-off events. For 139631/139803 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 30506 event pairs, 61 based on Foata normal form. 41/3404 useless extension candidates. Maximal degree in co-relation 35498. Up to 1000 conditions per place. [2022-11-02 21:10:19,879 INFO L137 encePairwiseOnDemand]: 81/86 looper letters, 406 selfloop transitions, 559 changer transitions 0/1522 dead transitions. [2022-11-02 21:10:19,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1522 transitions, 43787 flow [2022-11-02 21:10:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:10:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:10:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2022-11-02 21:10:19,880 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8395348837209302 [2022-11-02 21:10:19,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2022-11-02 21:10:19,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2022-11-02 21:10:19,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:10:19,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2022-11-02 21:10:19,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:19,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:19,882 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:19,882 INFO L175 Difference]: Start difference. First operand has 753 places, 1537 transitions, 41949 flow. Second operand 5 states and 361 transitions. [2022-11-02 21:10:19,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1522 transitions, 43787 flow [2022-11-02 21:10:22,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 1522 transitions, 43282 flow, removed 63 selfloop flow, removed 33 redundant places. [2022-11-02 21:10:22,075 INFO L231 Difference]: Finished difference. Result has 690 places, 1514 transitions, 43357 flow [2022-11-02 21:10:22,076 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40556, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=43357, PETRI_PLACES=690, PETRI_TRANSITIONS=1514} [2022-11-02 21:10:22,077 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 614 predicate places. [2022-11-02 21:10:22,077 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1514 transitions, 43357 flow [2022-11-02 21:10:22,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:22,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:22,077 INFO L208 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] [2022-11-02 21:10:22,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:22,278 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:10:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -4653495, now seen corresponding path program 17 times [2022-11-02 21:10:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:22,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556603885] [2022-11-02 21:10:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556603885] [2022-11-02 21:10:22,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556603885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:22,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584127899] [2022-11-02 21:10:22,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:10:22,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:22,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:22,759 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 21:10:22,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:10:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:10:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:23,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584127899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:24,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:24,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-02 21:10:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579744500] [2022-11-02 21:10:24,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 21:10:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 21:10:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-11-02 21:10:24,179 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:10:24,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1514 transitions, 43357 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:24,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:10:24,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:10:24,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:10:32,211 INFO L130 PetriNetUnfolder]: 1381/4325 cut-off events. [2022-11-02 21:10:32,212 INFO L131 PetriNetUnfolder]: For 191634/191634 co-relation queries the response was YES. [2022-11-02 21:10:32,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49090 conditions, 4325 events. 1381/4325 cut-off events. For 191634/191634 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40819 event pairs, 75 based on Foata normal form. 13/4328 useless extension candidates. Maximal degree in co-relation 48924. Up to 1754 conditions per place. [2022-11-02 21:10:32,321 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 832 selfloop transitions, 1124 changer transitions 50/2047 dead transitions. [2022-11-02 21:10:32,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 2047 transitions, 62299 flow [2022-11-02 21:10:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 21:10:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-02 21:10:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3520 transitions. [2022-11-02 21:10:32,327 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-11-02 21:10:32,328 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3520 transitions. [2022-11-02 21:10:32,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3520 transitions. [2022-11-02 21:10:32,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:10:32,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3520 transitions. [2022-11-02 21:10:32,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.0) internal successors, (3520), 64 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:32,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:32,342 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:32,342 INFO L175 Difference]: Start difference. First operand has 690 places, 1514 transitions, 43357 flow. Second operand 64 states and 3520 transitions. [2022-11-02 21:10:32,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 2047 transitions, 62299 flow [2022-11-02 21:10:35,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 2047 transitions, 62009 flow, removed 134 selfloop flow, removed 2 redundant places. [2022-11-02 21:10:35,837 INFO L231 Difference]: Finished difference. Result has 800 places, 1868 transitions, 59670 flow [2022-11-02 21:10:35,839 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43314, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=794, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=59670, PETRI_PLACES=800, PETRI_TRANSITIONS=1868} [2022-11-02 21:10:35,839 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 724 predicate places. [2022-11-02 21:10:35,839 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 1868 transitions, 59670 flow [2022-11-02 21:10:35,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:35,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:35,840 INFO L208 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] [2022-11-02 21:10:35,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-02 21:10:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:36,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:10:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1752903601, now seen corresponding path program 18 times [2022-11-02 21:10:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:36,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583455927] [2022-11-02 21:10:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:36,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:36,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583455927] [2022-11-02 21:10:36,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583455927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:36,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015923540] [2022-11-02 21:10:36,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:10:36,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:36,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:36,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 21:10:36,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 21:10:36,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:36,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:10:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:37,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015923540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:37,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:37,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-02 21:10:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114490131] [2022-11-02 21:10:37,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:37,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:10:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:10:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:10:37,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:10:37,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 1868 transitions, 59670 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:37,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:10:37,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:10:37,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:10:47,832 INFO L130 PetriNetUnfolder]: 1598/5025 cut-off events. [2022-11-02 21:10:47,832 INFO L131 PetriNetUnfolder]: For 281502/281512 co-relation queries the response was YES. [2022-11-02 21:10:47,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62866 conditions, 5025 events. 1598/5025 cut-off events. For 281502/281512 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49219 event pairs, 70 based on Foata normal form. 6/5024 useless extension candidates. Maximal degree in co-relation 62651. Up to 1732 conditions per place. [2022-11-02 21:10:48,016 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 836 selfloop transitions, 1422 changer transitions 30/2329 dead transitions. [2022-11-02 21:10:48,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 2329 transitions, 78803 flow [2022-11-02 21:10:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 21:10:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-02 21:10:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3354 transitions. [2022-11-02 21:10:48,022 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.639344262295082 [2022-11-02 21:10:48,023 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3354 transitions. [2022-11-02 21:10:48,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3354 transitions. [2022-11-02 21:10:48,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:10:48,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3354 transitions. [2022-11-02 21:10:48,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.98360655737705) internal successors, (3354), 61 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:48,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:48,041 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:48,041 INFO L175 Difference]: Start difference. First operand has 800 places, 1868 transitions, 59670 flow. Second operand 61 states and 3354 transitions. [2022-11-02 21:10:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 2329 transitions, 78803 flow [2022-11-02 21:10:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 2329 transitions, 77811 flow, removed 476 selfloop flow, removed 23 redundant places. [2022-11-02 21:10:53,048 INFO L231 Difference]: Finished difference. Result has 850 places, 2184 transitions, 75751 flow [2022-11-02 21:10:53,050 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=58983, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=75751, PETRI_PLACES=850, PETRI_TRANSITIONS=2184} [2022-11-02 21:10:53,051 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 774 predicate places. [2022-11-02 21:10:53,051 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 2184 transitions, 75751 flow [2022-11-02 21:10:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:53,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:10:53,052 INFO L208 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] [2022-11-02 21:10:53,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-02 21:10:53,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:53,302 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:10:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash -226042183, now seen corresponding path program 19 times [2022-11-02 21:10:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840797463] [2022-11-02 21:10:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:53,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:53,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840797463] [2022-11-02 21:10:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840797463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:53,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079053822] [2022-11-02 21:10:53,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:10:53,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:53,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:53,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 21:10:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:10:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:54,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:10:54,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079053822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:54,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:54,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-02 21:10:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676277669] [2022-11-02 21:10:54,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:54,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 21:10:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 21:10:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-11-02 21:10:54,766 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:10:54,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 2184 transitions, 75751 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:54,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:10:54,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:10:54,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:04,325 INFO L130 PetriNetUnfolder]: 1649/5157 cut-off events. [2022-11-02 21:11:04,325 INFO L131 PetriNetUnfolder]: For 315185/315200 co-relation queries the response was YES. [2022-11-02 21:11:04,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68469 conditions, 5157 events. 1649/5157 cut-off events. For 315185/315200 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 50737 event pairs, 99 based on Foata normal form. 9/5156 useless extension candidates. Maximal degree in co-relation 68244. Up to 2529 conditions per place. [2022-11-02 21:11:04,543 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 997 selfloop transitions, 1366 changer transitions 6/2410 dead transitions. [2022-11-02 21:11:04,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2410 transitions, 87329 flow [2022-11-02 21:11:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:11:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-02 21:11:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2022-11-02 21:11:04,547 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6493738819320215 [2022-11-02 21:11:04,547 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2022-11-02 21:11:04,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2022-11-02 21:11:04,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:04,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2022-11-02 21:11:04,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:04,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:04,553 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:04,553 INFO L175 Difference]: Start difference. First operand has 850 places, 2184 transitions, 75751 flow. Second operand 26 states and 1452 transitions. [2022-11-02 21:11:04,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2410 transitions, 87329 flow [2022-11-02 21:11:10,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2410 transitions, 86631 flow, removed 262 selfloop flow, removed 15 redundant places. [2022-11-02 21:11:10,367 INFO L231 Difference]: Finished difference. Result has 868 places, 2302 transitions, 85032 flow [2022-11-02 21:11:10,368 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75153, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=85032, PETRI_PLACES=868, PETRI_TRANSITIONS=2302} [2022-11-02 21:11:10,369 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 792 predicate places. [2022-11-02 21:11:10,369 INFO L495 AbstractCegarLoop]: Abstraction has has 868 places, 2302 transitions, 85032 flow [2022-11-02 21:11:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:10,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:10,369 INFO L208 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] [2022-11-02 21:11:10,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:10,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:10,570 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:11:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:10,570 INFO L85 PathProgramCache]: Analyzing trace with hash 997276537, now seen corresponding path program 20 times [2022-11-02 21:11:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:10,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028693078] [2022-11-02 21:11:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028693078] [2022-11-02 21:11:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028693078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131328694] [2022-11-02 21:11:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:10,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 21:11:11,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:11,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:11:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:11,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:11,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131328694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:11,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:11,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-02 21:11:11,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808256047] [2022-11-02 21:11:11,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:11:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:11:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:11:12,000 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:11:12,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 868 places, 2302 transitions, 85032 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:12,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:12,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:11:12,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:22,201 INFO L130 PetriNetUnfolder]: 1675/5245 cut-off events. [2022-11-02 21:11:22,202 INFO L131 PetriNetUnfolder]: For 343524/343537 co-relation queries the response was YES. [2022-11-02 21:11:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72619 conditions, 5245 events. 1675/5245 cut-off events. For 343524/343537 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51806 event pairs, 93 based on Foata normal form. 10/5246 useless extension candidates. Maximal degree in co-relation 72388. Up to 2385 conditions per place. [2022-11-02 21:11:22,375 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 872 selfloop transitions, 1561 changer transitions 6/2480 dead transitions. [2022-11-02 21:11:22,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 2480 transitions, 94917 flow [2022-11-02 21:11:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 21:11:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 21:11:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2528 transitions. [2022-11-02 21:11:22,379 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6390293225480284 [2022-11-02 21:11:22,380 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2528 transitions. [2022-11-02 21:11:22,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2528 transitions. [2022-11-02 21:11:22,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:22,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2528 transitions. [2022-11-02 21:11:22,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.95652173913044) internal successors, (2528), 46 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:22,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:22,389 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 86.0) internal successors, (4042), 47 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:22,390 INFO L175 Difference]: Start difference. First operand has 868 places, 2302 transitions, 85032 flow. Second operand 46 states and 2528 transitions. [2022-11-02 21:11:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 2480 transitions, 94917 flow [2022-11-02 21:11:28,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 903 places, 2480 transitions, 94602 flow, removed 147 selfloop flow, removed 7 redundant places. [2022-11-02 21:11:28,608 INFO L231 Difference]: Finished difference. Result has 918 places, 2399 transitions, 92016 flow [2022-11-02 21:11:28,610 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=84823, PETRI_DIFFERENCE_MINUEND_PLACES=858, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=92016, PETRI_PLACES=918, PETRI_TRANSITIONS=2399} [2022-11-02 21:11:28,611 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, 842 predicate places. [2022-11-02 21:11:28,611 INFO L495 AbstractCegarLoop]: Abstraction has has 918 places, 2399 transitions, 92016 flow [2022-11-02 21:11:28,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:28,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:28,611 INFO L208 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] [2022-11-02 21:11:28,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 21:11:28,812 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:11:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1414495959, now seen corresponding path program 21 times [2022-11-02 21:11:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:28,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174953454] [2022-11-02 21:11:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:29,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174953454] [2022-11-02 21:11:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174953454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336346161] [2022-11-02 21:11:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:11:29,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:29,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:29,268 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:29,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d81cce73-e73b-4074-b50f-7e96e86ee733/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 21:11:29,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:11:29,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:11:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:30,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336346161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:30,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:30,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-02 21:11:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396699480] [2022-11-02 21:11:30,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:30,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:11:30,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:11:30,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:11:30,618 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-02 21:11:30,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 918 places, 2399 transitions, 92016 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:30,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:30,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-02 21:11:30,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:45,795 INFO L130 PetriNetUnfolder]: 1855/5868 cut-off events. [2022-11-02 21:11:45,795 INFO L131 PetriNetUnfolder]: For 431531/431553 co-relation queries the response was YES. [2022-11-02 21:11:45,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84537 conditions, 5868 events. 1855/5868 cut-off events. For 431531/431553 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 59575 event pairs, 75 based on Foata normal form. 15/5874 useless extension candidates. Maximal degree in co-relation 84293. Up to 2249 conditions per place. [2022-11-02 21:11:46,003 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 1137 selfloop transitions, 1645 changer transitions 19/2842 dead transitions. [2022-11-02 21:11:46,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1000 places, 2842 transitions, 112644 flow [2022-11-02 21:11:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-02 21:11:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-02 21:11:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4703 transitions. [2022-11-02 21:11:46,010 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6358842617631152 [2022-11-02 21:11:46,010 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4703 transitions. [2022-11-02 21:11:46,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4703 transitions. [2022-11-02 21:11:46,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:46,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4703 transitions. [2022-11-02 21:11:46,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 54.68604651162791) internal successors, (4703), 86 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:46,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:46,026 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:46,026 INFO L175 Difference]: Start difference. First operand has 918 places, 2399 transitions, 92016 flow. Second operand 86 states and 4703 transitions. [2022-11-02 21:11:46,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1000 places, 2842 transitions, 112644 flow