./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/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_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/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_0a846371-5fd3-4f58-b8d1-620a4f782113/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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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 20:51:17,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:51:17,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:51:17,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:51:17,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:51:17,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:51:17,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:51:17,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:51:17,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:51:17,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:51:17,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:51:17,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:51:17,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:51:17,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:51:17,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:51:17,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:51:17,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:51:17,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:51:17,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:51:17,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:51:17,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:51:17,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:51:17,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:51:17,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:51:17,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:51:17,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:51:17,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:51:17,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:51:17,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:51:17,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:51:17,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:51:17,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:51:17,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:51:17,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:51:17,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:51:17,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:51:17,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:51:17,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:51:17,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:51:17,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:51:17,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:51:17,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:51:18,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:51:18,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:51:18,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:51:18,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:51:18,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:51:18,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:51:18,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:51:18,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:51:18,017 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:51:18,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:51:18,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:51:18,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:51:18,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:51:18,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:51:18,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:51:18,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:51:18,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:51:18,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:51:18,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:51:18,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:51:18,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:51:18,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:51:18,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:51:18,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:51:18,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:51:18,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:51:18,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:51:18,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:51:18,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:51:18,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:51:18,022 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:51:18,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:51:18,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:51:18,023 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_0a846371-5fd3-4f58-b8d1-620a4f782113/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-02 20:51:18,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:51:18,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:51:18,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:51:18,375 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:51:18,375 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:51:18,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-02 20:51:18,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/data/34ef9f53d/0943e32b55c8459d9baae9eca3e8f935/FLAGe7c9b2ae8 [2022-11-02 20:51:19,080 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:51:19,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-02 20:51:19,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/data/34ef9f53d/0943e32b55c8459d9baae9eca3e8f935/FLAGe7c9b2ae8 [2022-11-02 20:51:19,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/data/34ef9f53d/0943e32b55c8459d9baae9eca3e8f935 [2022-11-02 20:51:19,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:51:19,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:51:19,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:51:19,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:51:19,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:51:19,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3958b580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19, skipping insertion in model container [2022-11-02 20:51:19,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:51:19,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:51:19,691 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_0a846371-5fd3-4f58-b8d1-620a4f782113/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-02 20:51:19,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:51:19,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:51:19,731 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_0a846371-5fd3-4f58-b8d1-620a4f782113/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-02 20:51:19,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:51:19,748 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:51:19,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19 WrapperNode [2022-11-02 20:51:19,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:51:19,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:51:19,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:51:19,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:51:19,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,796 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-11-02 20:51:19,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:51:19,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:51:19,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:51:19,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:51:19,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:51:19,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:51:19,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:51:19,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:51:19,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (1/1) ... [2022-11-02 20:51:19,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:51:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:19,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:51:19,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:51:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:51:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:51:19,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:51:19,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:51:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:51:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:51:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:51:19,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:51:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:51:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:51:19,982 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 20:51:20,088 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:51:20,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:51:20,551 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:51:20,681 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:51:20,681 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:51:20,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:51:20 BoogieIcfgContainer [2022-11-02 20:51:20,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:51:20,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:51:20,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:51:20,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:51:20,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:51:19" (1/3) ... [2022-11-02 20:51:20,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b218ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:51:20, skipping insertion in model container [2022-11-02 20:51:20,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:19" (2/3) ... [2022-11-02 20:51:20,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b218ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:51:20, skipping insertion in model container [2022-11-02 20:51:20,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:51:20" (3/3) ... [2022-11-02 20:51:20,704 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-02 20:51:20,717 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:51:20,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:51:20,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:51:20,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:51:20,824 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:51:20,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-11-02 20:51:20,989 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-02 20:51:20,995 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:51:21,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-02 20:51:21,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-11-02 20:51:21,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-11-02 20:51:21,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:21,040 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;@5d454133, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:21,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:51:21,088 INFO L130 PetriNetUnfolder]: 11/121 cut-off events. [2022-11-02 20:51:21,088 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:51:21,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:21,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:21,089 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 20:51:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2032369785, now seen corresponding path program 1 times [2022-11-02 20:51:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:21,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626049645] [2022-11-02 20:51:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:21,409 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 20:51:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626049645] [2022-11-02 20:51:21,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626049645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:21,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:21,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222386700] [2022-11-02 20:51:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:51:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:51:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:21,461 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2022-11-02 20:51:21,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 20:51:21,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:21,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2022-11-02 20:51:21,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:21,553 INFO L130 PetriNetUnfolder]: 8/122 cut-off events. [2022-11-02 20:51:21,553 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-02 20:51:21,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2022-11-02 20:51:21,557 INFO L137 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2022-11-02 20:51:21,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2022-11-02 20:51:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:51:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:51:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-11-02 20:51:21,578 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2022-11-02 20:51:21,579 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-11-02 20:51:21,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-11-02 20:51:21,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:21,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-11-02 20:51:21,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 20:51:21,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 20:51:21,599 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 20:51:21,601 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2022-11-02 20:51:21,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2022-11-02 20:51:21,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:51:21,612 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2022-11-02 20:51:21,614 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2022-11-02 20:51:21,623 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2022-11-02 20:51:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2022-11-02 20:51:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 20:51:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:21,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:51:21,625 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 20:51:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2022-11-02 20:51:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907439818] [2022-11-02 20:51:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:22,207 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 20:51:22,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907439818] [2022-11-02 20:51:22,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907439818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:22,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:22,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:51:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507989082] [2022-11-02 20:51:22,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:22,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:51:22,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:51:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:51:22,224 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2022-11-02 20:51:22,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 20:51:22,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:22,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2022-11-02 20:51:22,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:22,406 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2022-11-02 20:51:22,407 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-02 20:51:22,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 254 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2022-11-02 20:51:22,410 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2022-11-02 20:51:22,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2022-11-02 20:51:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:51:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:51:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2022-11-02 20:51:22,418 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-11-02 20:51:22,418 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2022-11-02 20:51:22,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2022-11-02 20:51:22,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:22,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2022-11-02 20:51:22,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 20:51:22,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,428 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2022-11-02 20:51:22,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2022-11-02 20:51:22,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:22,435 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2022-11-02 20:51:22,435 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-11-02 20:51:22,436 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-11-02 20:51:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2022-11-02 20:51:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 20:51:22,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:22,439 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, 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 20:51:22,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:51:22,439 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 20:51:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2022-11-02 20:51:22,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523955150] [2022-11-02 20:51:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:22,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:22,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:22,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523955150] [2022-11-02 20:51:22,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523955150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:22,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:22,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:22,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163448040] [2022-11-02 20:51:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:22,857 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-11-02 20:51:22,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 20:51:22,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:22,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-11-02 20:51:22,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:22,954 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2022-11-02 20:51:22,954 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:51:22,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 347 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2022-11-02 20:51:22,956 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2022-11-02 20:51:22,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2022-11-02 20:51:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-02 20:51:22,959 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2022-11-02 20:51:22,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-02 20:51:22,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-02 20:51:22,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:22,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-02 20:51:22,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 20:51:22,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,963 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2022-11-02 20:51:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2022-11-02 20:51:22,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-02 20:51:22,970 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2022-11-02 20:51:22,970 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2022-11-02 20:51:22,973 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2022-11-02 20:51:22,973 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2022-11-02 20:51:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 20:51:22,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:22,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:22,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:51:22,975 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 20:51:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash -677544406, now seen corresponding path program 1 times [2022-11-02 20:51:22,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:22,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614607427] [2022-11-02 20:51:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:23,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614607427] [2022-11-02 20:51:23,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614607427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:23,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:23,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:51:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789860121] [2022-11-02 20:51:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:23,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:51:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:51:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:51:23,571 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 133 [2022-11-02 20:51:23,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 20:51:23,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:23,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 133 [2022-11-02 20:51:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:23,977 INFO L130 PetriNetUnfolder]: 55/344 cut-off events. [2022-11-02 20:51:23,978 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-02 20:51:23,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 344 events. 55/344 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1408 event pairs, 15 based on Foata normal form. 6/312 useless extension candidates. Maximal degree in co-relation 544. Up to 64 conditions per place. [2022-11-02 20:51:23,982 INFO L137 encePairwiseOnDemand]: 121/133 looper letters, 33 selfloop transitions, 7 changer transitions 28/150 dead transitions. [2022-11-02 20:51:23,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 150 transitions, 490 flow [2022-11-02 20:51:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:51:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:51:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1113 transitions. [2022-11-02 20:51:23,986 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7607655502392344 [2022-11-02 20:51:23,987 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1113 transitions. [2022-11-02 20:51:23,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1113 transitions. [2022-11-02 20:51:23,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:23,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1113 transitions. [2022-11-02 20:51:23,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.18181818181819) internal successors, (1113), 11 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 20:51:23,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:24,001 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:24,001 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 11 states and 1113 transitions. [2022-11-02 20:51:24,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 150 transitions, 490 flow [2022-11-02 20:51:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:24,011 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 286 flow [2022-11-02 20:51:24,011 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=286, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2022-11-02 20:51:24,013 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2022-11-02 20:51:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 286 flow [2022-11-02 20:51:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 20:51:24,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:24,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:24,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:51:24,023 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 20:51:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1159863037, now seen corresponding path program 1 times [2022-11-02 20:51:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737837984] [2022-11-02 20:51:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:24,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:24,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737837984] [2022-11-02 20:51:24,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737837984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:24,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:24,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604670675] [2022-11-02 20:51:24,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:24,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:24,202 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-02 20:51:24,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 20:51:24,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:24,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-02 20:51:24,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:24,264 INFO L130 PetriNetUnfolder]: 29/230 cut-off events. [2022-11-02 20:51:24,265 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-11-02 20:51:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 230 events. 29/230 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 632 event pairs, 7 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 350. Up to 46 conditions per place. [2022-11-02 20:51:24,267 INFO L137 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2022-11-02 20:51:24,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 120 transitions, 340 flow [2022-11-02 20:51:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-11-02 20:51:24,269 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-11-02 20:51:24,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-11-02 20:51:24,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-11-02 20:51:24,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:24,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-11-02 20:51:24,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 20:51:24,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:24,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:24,272 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 286 flow. Second operand 3 states and 360 transitions. [2022-11-02 20:51:24,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 120 transitions, 340 flow [2022-11-02 20:51:24,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 120 transitions, 320 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-02 20:51:24,276 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 274 flow [2022-11-02 20:51:24,277 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2022-11-02 20:51:24,278 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 2 predicate places. [2022-11-02 20:51:24,278 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 274 flow [2022-11-02 20:51:24,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 20:51:24,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:24,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:51:24,279 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 20:51:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1830296443, now seen corresponding path program 1 times [2022-11-02 20:51:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506849660] [2022-11-02 20:51:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:51:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506849660] [2022-11-02 20:51:24,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506849660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180575769] [2022-11-02 20:51:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:24,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:24,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:51:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:51:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:26,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:51:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:26,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:26,667 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:26,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-02 20:51:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:28,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180575769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:28,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:28,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 17] total 38 [2022-11-02 20:51:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149303170] [2022-11-02 20:51:28,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:51:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:51:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:51:28,133 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2022-11-02 20:51:28,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 274 flow. Second operand has 38 states, 38 states have (on average 72.39473684210526) internal successors, (2751), 38 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states 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 20:51:28,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:28,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2022-11-02 20:51:28,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:29,876 INFO L130 PetriNetUnfolder]: 116/700 cut-off events. [2022-11-02 20:51:29,876 INFO L131 PetriNetUnfolder]: For 127/135 co-relation queries the response was YES. [2022-11-02 20:51:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142 conditions, 700 events. 116/700 cut-off events. For 127/135 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3631 event pairs, 10 based on Foata normal form. 8/670 useless extension candidates. Maximal degree in co-relation 1134. Up to 70 conditions per place. [2022-11-02 20:51:29,881 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 62 selfloop transitions, 26 changer transitions 44/191 dead transitions. [2022-11-02 20:51:29,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 191 transitions, 746 flow [2022-11-02 20:51:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:51:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:51:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2481 transitions. [2022-11-02 20:51:29,888 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5486510393631137 [2022-11-02 20:51:29,888 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2481 transitions. [2022-11-02 20:51:29,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2481 transitions. [2022-11-02 20:51:29,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:29,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2481 transitions. [2022-11-02 20:51:29,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 72.97058823529412) internal successors, (2481), 34 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states 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 20:51:29,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states 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 20:51:29,907 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states 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 20:51:29,907 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 274 flow. Second operand 34 states and 2481 transitions. [2022-11-02 20:51:29,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 191 transitions, 746 flow [2022-11-02 20:51:29,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 191 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:29,915 INFO L231 Difference]: Finished difference. Result has 167 places, 123 transitions, 400 flow [2022-11-02 20:51:29,917 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=400, PETRI_PLACES=167, PETRI_TRANSITIONS=123} [2022-11-02 20:51:29,920 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 49 predicate places. [2022-11-02 20:51:29,923 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 123 transitions, 400 flow [2022-11-02 20:51:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 72.39473684210526) internal successors, (2751), 38 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states 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 20:51:29,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:29,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:29,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:30,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:30,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1501596615, now seen corresponding path program 2 times [2022-11-02 20:51:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034622076] [2022-11-02 20:51:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:51:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034622076] [2022-11-02 20:51:30,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034622076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:30,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:51:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017724371] [2022-11-02 20:51:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:51:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:51:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:51:30,362 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-11-02 20:51:30,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 123 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 20:51:30,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:30,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-11-02 20:51:30,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:30,486 INFO L130 PetriNetUnfolder]: 54/468 cut-off events. [2022-11-02 20:51:30,487 INFO L131 PetriNetUnfolder]: For 259/263 co-relation queries the response was YES. [2022-11-02 20:51:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 468 events. 54/468 cut-off events. For 259/263 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1914 event pairs, 9 based on Foata normal form. 4/451 useless extension candidates. Maximal degree in co-relation 795. Up to 60 conditions per place. [2022-11-02 20:51:30,491 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 22 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2022-11-02 20:51:30,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 138 transitions, 544 flow [2022-11-02 20:51:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:51:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:51:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2022-11-02 20:51:30,493 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2022-11-02 20:51:30,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2022-11-02 20:51:30,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2022-11-02 20:51:30,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:30,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2022-11-02 20:51:30,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 20:51:30,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,497 INFO L175 Difference]: Start difference. First operand has 167 places, 123 transitions, 400 flow. Second operand 4 states and 476 transitions. [2022-11-02 20:51:30,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 138 transitions, 544 flow [2022-11-02 20:51:30,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 477 flow, removed 16 selfloop flow, removed 24 redundant places. [2022-11-02 20:51:30,506 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 454 flow [2022-11-02 20:51:30,506 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2022-11-02 20:51:30,507 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 19 predicate places. [2022-11-02 20:51:30,508 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 454 flow [2022-11-02 20:51:30,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 20:51:30,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:30,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:30,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:51:30,509 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 20:51:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash 18095569, now seen corresponding path program 3 times [2022-11-02 20:51:30,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:30,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984055189] [2022-11-02 20:51:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:51:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984055189] [2022-11-02 20:51:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984055189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:30,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:30,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:51:30,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98364799] [2022-11-02 20:51:30,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:30,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:51:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:51:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:51:30,790 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-11-02 20:51:30,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 20:51:30,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:30,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-11-02 20:51:30,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:30,964 INFO L130 PetriNetUnfolder]: 86/771 cut-off events. [2022-11-02 20:51:30,964 INFO L131 PetriNetUnfolder]: For 534/538 co-relation queries the response was YES. [2022-11-02 20:51:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 771 events. 86/771 cut-off events. For 534/538 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4430 event pairs, 18 based on Foata normal form. 27/757 useless extension candidates. Maximal degree in co-relation 1305. Up to 98 conditions per place. [2022-11-02 20:51:30,969 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 32 selfloop transitions, 4 changer transitions 1/142 dead transitions. [2022-11-02 20:51:30,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 601 flow [2022-11-02 20:51:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:51:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:51:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2022-11-02 20:51:30,972 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2022-11-02 20:51:30,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2022-11-02 20:51:30,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2022-11-02 20:51:30,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:30,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2022-11-02 20:51:30,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 20:51:30,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,976 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,976 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 454 flow. Second operand 4 states and 474 transitions. [2022-11-02 20:51:30,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 601 flow [2022-11-02 20:51:30,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 589 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:30,981 INFO L231 Difference]: Finished difference. Result has 142 places, 132 transitions, 457 flow [2022-11-02 20:51:30,981 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=142, PETRI_TRANSITIONS=132} [2022-11-02 20:51:30,985 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-02 20:51:30,985 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 132 transitions, 457 flow [2022-11-02 20:51:30,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 20:51:30,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:30,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:51:30,986 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 20:51:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1388921737, now seen corresponding path program 1 times [2022-11-02 20:51:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:30,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325332181] [2022-11-02 20:51:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:51:31,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325332181] [2022-11-02 20:51:31,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325332181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421155952] [2022-11-02 20:51:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:31,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:31,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:31,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:51:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:51:31,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:33,502 INFO L356 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-02 20:51:33,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-11-02 20:51:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:33,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:34,206 INFO L356 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-02 20:51:34,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2022-11-02 20:51:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:36,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421155952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:36,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:36,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 20] total 41 [2022-11-02 20:51:36,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705643298] [2022-11-02 20:51:36,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:51:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:51:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:51:36,683 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2022-11-02 20:51:36,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 132 transitions, 457 flow. Second operand has 41 states, 41 states have (on average 75.58536585365853) internal successors, (3099), 41 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states 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 20:51:36,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:36,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2022-11-02 20:51:36,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:44,353 INFO L130 PetriNetUnfolder]: 1899/7117 cut-off events. [2022-11-02 20:51:44,353 INFO L131 PetriNetUnfolder]: For 8752/8766 co-relation queries the response was YES. [2022-11-02 20:51:44,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15346 conditions, 7117 events. 1899/7117 cut-off events. For 8752/8766 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 70579 event pairs, 305 based on Foata normal form. 32/6770 useless extension candidates. Maximal degree in co-relation 15326. Up to 710 conditions per place. [2022-11-02 20:51:44,414 INFO L137 encePairwiseOnDemand]: 110/133 looper letters, 286 selfloop transitions, 129 changer transitions 109/588 dead transitions. [2022-11-02 20:51:44,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 588 transitions, 3352 flow [2022-11-02 20:51:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:51:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-02 20:51:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5664 transitions. [2022-11-02 20:51:44,432 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5914786967418546 [2022-11-02 20:51:44,432 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5664 transitions. [2022-11-02 20:51:44,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5664 transitions. [2022-11-02 20:51:44,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:44,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5664 transitions. [2022-11-02 20:51:44,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 78.66666666666667) internal successors, (5664), 72 states have internal predecessors, (5664), 0 states have call successors, (0), 0 states 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 20:51:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 133.0) internal successors, (9709), 73 states have internal predecessors, (9709), 0 states have call successors, (0), 0 states 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 20:51:44,472 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 133.0) internal successors, (9709), 73 states have internal predecessors, (9709), 0 states have call successors, (0), 0 states 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 20:51:44,472 INFO L175 Difference]: Start difference. First operand has 142 places, 132 transitions, 457 flow. Second operand 72 states and 5664 transitions. [2022-11-02 20:51:44,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 588 transitions, 3352 flow [2022-11-02 20:51:44,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 588 transitions, 3347 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:44,500 INFO L231 Difference]: Finished difference. Result has 264 places, 249 transitions, 1866 flow [2022-11-02 20:51:44,500 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1866, PETRI_PLACES=264, PETRI_TRANSITIONS=249} [2022-11-02 20:51:44,501 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 146 predicate places. [2022-11-02 20:51:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 249 transitions, 1866 flow [2022-11-02 20:51:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.58536585365853) internal successors, (3099), 41 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states 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 20:51:44,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:44,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:44,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:44,727 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 20:51:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1738020841, now seen corresponding path program 2 times [2022-11-02 20:51:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78289207] [2022-11-02 20:51:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:51:45,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78289207] [2022-11-02 20:51:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78289207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570971451] [2022-11-02 20:51:45,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:51:45,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:45,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:45,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:45,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:51:45,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:51:45,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-02 20:51:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:46,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:51:47,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:51:47,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:51:48,585 INFO L356 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-02 20:51:48,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-11-02 20:51:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:48,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:00,163 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:00,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-02 20:52:00,228 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:52:00,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 549 [2022-11-02 20:52:00,294 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:52:00,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 499 [2022-11-02 20:52:00,361 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:52:00,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 399 [2022-11-02 20:52:03,092 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:03,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-02 20:52:03,130 INFO L356 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-11-02 20:52:03,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 505 [2022-11-02 20:52:03,172 INFO L356 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-11-02 20:52:03,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 405 [2022-11-02 20:52:03,212 INFO L356 Elim1Store]: treesize reduction 56, result has 13.8 percent of original size [2022-11-02 20:52:03,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 355 [2022-11-02 20:52:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570971451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:06,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:06,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 33, 29] total 63 [2022-11-02 20:52:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548924742] [2022-11-02 20:52:06,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:06,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-02 20:52:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-02 20:52:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=3329, Unknown=53, NotChecked=0, Total=3906 [2022-11-02 20:52:06,061 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-02 20:52:06,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 249 transitions, 1866 flow. Second operand has 63 states, 63 states have (on average 60.80952380952381) internal successors, (3831), 63 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states 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 20:52:06,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:06,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-02 20:52:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:14,759 INFO L130 PetriNetUnfolder]: 2605/9786 cut-off events. [2022-11-02 20:52:14,759 INFO L131 PetriNetUnfolder]: For 136810/137082 co-relation queries the response was YES. [2022-11-02 20:52:14,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47826 conditions, 9786 events. 2605/9786 cut-off events. For 136810/137082 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 104129 event pairs, 824 based on Foata normal form. 53/9267 useless extension candidates. Maximal degree in co-relation 47754. Up to 3502 conditions per place. [2022-11-02 20:52:14,904 INFO L137 encePairwiseOnDemand]: 95/133 looper letters, 267 selfloop transitions, 168 changer transitions 78/567 dead transitions. [2022-11-02 20:52:14,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 567 transitions, 7102 flow [2022-11-02 20:52:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-02 20:52:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-02 20:52:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3711 transitions. [2022-11-02 20:52:14,913 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4729195871033516 [2022-11-02 20:52:14,913 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3711 transitions. [2022-11-02 20:52:14,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3711 transitions. [2022-11-02 20:52:14,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:14,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3711 transitions. [2022-11-02 20:52:14,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 62.898305084745765) internal successors, (3711), 59 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states 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 20:52:14,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 133.0) internal successors, (7980), 60 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states 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 20:52:14,939 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 133.0) internal successors, (7980), 60 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states 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 20:52:14,939 INFO L175 Difference]: Start difference. First operand has 264 places, 249 transitions, 1866 flow. Second operand 59 states and 3711 transitions. [2022-11-02 20:52:14,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 567 transitions, 7102 flow [2022-11-02 20:52:15,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 567 transitions, 6362 flow, removed 345 selfloop flow, removed 22 redundant places. [2022-11-02 20:52:15,421 INFO L231 Difference]: Finished difference. Result has 320 places, 384 transitions, 4127 flow [2022-11-02 20:52:15,423 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=4127, PETRI_PLACES=320, PETRI_TRANSITIONS=384} [2022-11-02 20:52:15,423 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 202 predicate places. [2022-11-02 20:52:15,424 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 384 transitions, 4127 flow [2022-11-02 20:52:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 60.80952380952381) internal successors, (3831), 63 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states 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 20:52:15,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:15,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:15,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:15,647 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 20:52:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1453494819, now seen corresponding path program 3 times [2022-11-02 20:52:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541259178] [2022-11-02 20:52:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541259178] [2022-11-02 20:52:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541259178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704906774] [2022-11-02 20:52:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:52:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:19,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:19,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:52:19,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:52:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:19,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-02 20:52:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:20,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:52:21,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:52:21,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:52:21,744 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:21,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 14 [2022-11-02 20:52:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:21,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:25,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:25,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-02 20:52:25,094 INFO L356 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-02 20:52:25,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 275 [2022-11-02 20:52:25,146 INFO L356 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-02 20:52:25,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 223 [2022-11-02 20:52:25,202 INFO L356 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-02 20:52:25,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 197 [2022-11-02 20:52:26,242 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:26,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-02 20:52:26,280 INFO L356 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-02 20:52:26,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 571 treesize of output 511 [2022-11-02 20:52:26,321 INFO L356 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-02 20:52:26,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 503 treesize of output 459 [2022-11-02 20:52:26,357 INFO L356 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-02 20:52:26,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 451 treesize of output 355 [2022-11-02 20:52:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704906774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:27,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 23] total 68 [2022-11-02 20:52:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315316125] [2022-11-02 20:52:27,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:27,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:52:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:52:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=3637, Unknown=54, NotChecked=0, Total=4556 [2022-11-02 20:52:27,877 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-11-02 20:52:27,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 384 transitions, 4127 flow. Second operand has 68 states, 68 states have (on average 57.705882352941174) internal successors, (3924), 68 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states 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 20:52:27,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:27,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-11-02 20:52:27,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:51,008 INFO L130 PetriNetUnfolder]: 3667/14078 cut-off events. [2022-11-02 20:52:51,009 INFO L131 PetriNetUnfolder]: For 579733/580229 co-relation queries the response was YES. [2022-11-02 20:52:51,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94178 conditions, 14078 events. 3667/14078 cut-off events. For 579733/580229 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 159525 event pairs, 520 based on Foata normal form. 289/13630 useless extension candidates. Maximal degree in co-relation 94085. Up to 2855 conditions per place. [2022-11-02 20:52:51,239 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 337 selfloop transitions, 308 changer transitions 208/904 dead transitions. [2022-11-02 20:52:51,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 904 transitions, 16093 flow [2022-11-02 20:52:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-02 20:52:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-02 20:52:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 6670 transitions. [2022-11-02 20:52:51,258 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4518051886472939 [2022-11-02 20:52:51,258 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 6670 transitions. [2022-11-02 20:52:51,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 6670 transitions. [2022-11-02 20:52:51,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:51,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 6670 transitions. [2022-11-02 20:52:51,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 60.090090090090094) internal successors, (6670), 111 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states 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 20:52:51,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 133.0) internal successors, (14896), 112 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states 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 20:52:51,316 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 133.0) internal successors, (14896), 112 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states 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 20:52:51,317 INFO L175 Difference]: Start difference. First operand has 320 places, 384 transitions, 4127 flow. Second operand 111 states and 6670 transitions. [2022-11-02 20:52:51,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 904 transitions, 16093 flow [2022-11-02 20:52:53,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 904 transitions, 14029 flow, removed 998 selfloop flow, removed 37 redundant places. [2022-11-02 20:52:53,218 INFO L231 Difference]: Finished difference. Result has 453 places, 485 transitions, 6105 flow [2022-11-02 20:52:53,219 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=6105, PETRI_PLACES=453, PETRI_TRANSITIONS=485} [2022-11-02 20:52:53,219 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 335 predicate places. [2022-11-02 20:52:53,220 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 485 transitions, 6105 flow [2022-11-02 20:52:53,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 57.705882352941174) internal successors, (3924), 68 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states 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 20:52:53,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:53,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:53,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:53,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:52:53,426 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 20:52:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2047066575, now seen corresponding path program 4 times [2022-11-02 20:52:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:53,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221164916] [2022-11-02 20:52:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221164916] [2022-11-02 20:52:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221164916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899366336] [2022-11-02 20:52:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:52:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:57,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:57,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:52:57,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:52:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-02 20:52:57,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:59,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:59,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-11-02 20:52:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:59,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:00,199 INFO L356 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-02 20:53:00,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2022-11-02 20:53:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:02,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899366336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:02,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:02,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 23] total 68 [2022-11-02 20:53:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875542818] [2022-11-02 20:53:02,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:02,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:53:02,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:53:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=3867, Unknown=0, NotChecked=0, Total=4556 [2022-11-02 20:53:02,233 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-02 20:53:02,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 485 transitions, 6105 flow. Second operand has 68 states, 68 states have (on average 60.6764705882353) internal successors, (4126), 68 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states 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 20:53:02,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:02,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-02 20:53:02,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:19,822 INFO L130 PetriNetUnfolder]: 4713/17678 cut-off events. [2022-11-02 20:53:19,822 INFO L131 PetriNetUnfolder]: For 807849/808514 co-relation queries the response was YES. [2022-11-02 20:53:20,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128221 conditions, 17678 events. 4713/17678 cut-off events. For 807849/808514 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 209652 event pairs, 750 based on Foata normal form. 111/16847 useless extension candidates. Maximal degree in co-relation 128064. Up to 3659 conditions per place. [2022-11-02 20:53:20,387 INFO L137 encePairwiseOnDemand]: 97/133 looper letters, 370 selfloop transitions, 366 changer transitions 106/896 dead transitions. [2022-11-02 20:53:20,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 896 transitions, 17277 flow [2022-11-02 20:53:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-02 20:53:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-11-02 20:53:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5091 transitions. [2022-11-02 20:53:20,402 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.47847744360902256 [2022-11-02 20:53:20,402 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5091 transitions. [2022-11-02 20:53:20,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5091 transitions. [2022-11-02 20:53:20,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:20,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5091 transitions. [2022-11-02 20:53:20,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 63.6375) internal successors, (5091), 80 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states 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 20:53:20,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 0 states have call successors, (0), 0 states 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 20:53:20,426 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 0 states have call successors, (0), 0 states 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 20:53:20,427 INFO L175 Difference]: Start difference. First operand has 453 places, 485 transitions, 6105 flow. Second operand 80 states and 5091 transitions. [2022-11-02 20:53:20,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 896 transitions, 17277 flow [2022-11-02 20:53:24,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 896 transitions, 15583 flow, removed 813 selfloop flow, removed 73 redundant places. [2022-11-02 20:53:24,142 INFO L231 Difference]: Finished difference. Result has 444 places, 589 transitions, 8225 flow [2022-11-02 20:53:24,143 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=8225, PETRI_PLACES=444, PETRI_TRANSITIONS=589} [2022-11-02 20:53:24,143 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 326 predicate places. [2022-11-02 20:53:24,144 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 589 transitions, 8225 flow [2022-11-02 20:53:24,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 60.6764705882353) internal successors, (4126), 68 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states 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 20:53:24,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:24,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:24,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:24,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:53:24,345 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 20:53:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1134251460, now seen corresponding path program 5 times [2022-11-02 20:53:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698972724] [2022-11-02 20:53:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698972724] [2022-11-02 20:53:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698972724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72418115] [2022-11-02 20:53:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:53:29,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:29,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:29,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:29,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:53:29,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:53:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:53:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:29,981 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:53:29,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-11-02 20:53:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:53:30,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:30,398 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:53:30,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-11-02 20:53:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:53:30,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72418115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:30,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:30,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 9] total 42 [2022-11-02 20:53:30,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874049358] [2022-11-02 20:53:30,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:53:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:53:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:53:30,956 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 133 [2022-11-02 20:53:30,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 589 transitions, 8225 flow. Second operand has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 20:53:30,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:30,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 133 [2022-11-02 20:53:30,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:40,811 INFO L130 PetriNetUnfolder]: 3285/15231 cut-off events. [2022-11-02 20:53:40,811 INFO L131 PetriNetUnfolder]: For 839975/842193 co-relation queries the response was YES. [2022-11-02 20:53:41,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119415 conditions, 15231 events. 3285/15231 cut-off events. For 839975/842193 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 188713 event pairs, 1247 based on Foata normal form. 314/14483 useless extension candidates. Maximal degree in co-relation 119272. Up to 3596 conditions per place. [2022-11-02 20:53:41,298 INFO L137 encePairwiseOnDemand]: 109/133 looper letters, 385 selfloop transitions, 205 changer transitions 45/728 dead transitions. [2022-11-02 20:53:41,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 728 transitions, 12222 flow [2022-11-02 20:53:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 20:53:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-02 20:53:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2861 transitions. [2022-11-02 20:53:41,303 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5002622836160168 [2022-11-02 20:53:41,303 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2861 transitions. [2022-11-02 20:53:41,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2861 transitions. [2022-11-02 20:53:41,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:41,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2861 transitions. [2022-11-02 20:53:41,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 66.53488372093024) internal successors, (2861), 43 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states 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 20:53:41,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states 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 20:53:41,319 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states 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 20:53:41,319 INFO L175 Difference]: Start difference. First operand has 444 places, 589 transitions, 8225 flow. Second operand 43 states and 2861 transitions. [2022-11-02 20:53:41,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 728 transitions, 12222 flow [2022-11-02 20:53:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 728 transitions, 11742 flow, removed 184 selfloop flow, removed 40 redundant places. [2022-11-02 20:53:45,036 INFO L231 Difference]: Finished difference. Result has 448 places, 623 transitions, 8791 flow [2022-11-02 20:53:45,037 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=7779, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=8791, PETRI_PLACES=448, PETRI_TRANSITIONS=623} [2022-11-02 20:53:45,037 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 330 predicate places. [2022-11-02 20:53:45,037 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 623 transitions, 8791 flow [2022-11-02 20:53:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states 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 20:53:45,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:45,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:45,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:45,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:45,242 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 20:53:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 559447831, now seen corresponding path program 6 times [2022-11-02 20:53:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951803729] [2022-11-02 20:53:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:53:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951803729] [2022-11-02 20:53:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951803729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490506934] [2022-11-02 20:53:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:53:45,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:45,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:45,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:53:45,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 20:53:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:53:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:53:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:53:46,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490506934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:46,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:46,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2022-11-02 20:53:46,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489776088] [2022-11-02 20:53:46,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:53:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:53:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:53:46,304 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-11-02 20:53:46,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 623 transitions, 8791 flow. Second operand has 10 states, 10 states have (on average 115.5) internal successors, (1155), 10 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 20:53:46,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:46,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-11-02 20:53:46,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:53,685 INFO L130 PetriNetUnfolder]: 3533/17977 cut-off events. [2022-11-02 20:53:53,685 INFO L131 PetriNetUnfolder]: For 983445/985361 co-relation queries the response was YES. [2022-11-02 20:53:54,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136969 conditions, 17977 events. 3533/17977 cut-off events. For 983445/985361 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 232019 event pairs, 1081 based on Foata normal form. 428/17202 useless extension candidates. Maximal degree in co-relation 136823. Up to 3617 conditions per place. [2022-11-02 20:53:54,434 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 150 selfloop transitions, 308 changer transitions 0/652 dead transitions. [2022-11-02 20:53:54,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 652 transitions, 10578 flow [2022-11-02 20:53:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2022-11-02 20:53:54,436 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8872180451127819 [2022-11-02 20:53:54,436 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2022-11-02 20:53:54,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2022-11-02 20:53:54,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:54,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2022-11-02 20:53:54,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 20:53:54,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:54,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:54,440 INFO L175 Difference]: Start difference. First operand has 448 places, 623 transitions, 8791 flow. Second operand 6 states and 708 transitions. [2022-11-02 20:53:54,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 652 transitions, 10578 flow [2022-11-02 20:53:58,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 652 transitions, 10213 flow, removed 40 selfloop flow, removed 28 redundant places. [2022-11-02 20:53:58,616 INFO L231 Difference]: Finished difference. Result has 422 places, 641 transitions, 10273 flow [2022-11-02 20:53:58,617 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10273, PETRI_PLACES=422, PETRI_TRANSITIONS=641} [2022-11-02 20:53:58,617 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 304 predicate places. [2022-11-02 20:53:58,617 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 641 transitions, 10273 flow [2022-11-02 20:53:58,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 115.5) internal successors, (1155), 10 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 20:53:58,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:58,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:58,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:58,834 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 20:53:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1165427386, now seen corresponding path program 7 times [2022-11-02 20:53:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638896148] [2022-11-02 20:53:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638896148] [2022-11-02 20:53:59,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638896148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121753658] [2022-11-02 20:53:59,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:53:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:59,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:59,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:53:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:53:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:53:59,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:54:00,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121753658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:00,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:00,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 35 [2022-11-02 20:54:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875762501] [2022-11-02 20:54:00,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:54:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:54:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:54:00,438 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-11-02 20:54:00,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 641 transitions, 10273 flow. Second operand has 35 states, 35 states have (on average 97.25714285714285) internal successors, (3404), 35 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 20:54:00,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:00,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-11-02 20:54:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:07,340 INFO L130 PetriNetUnfolder]: 2455/11775 cut-off events. [2022-11-02 20:54:07,340 INFO L131 PetriNetUnfolder]: For 620209/620828 co-relation queries the response was YES. [2022-11-02 20:54:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86819 conditions, 11775 events. 2455/11775 cut-off events. For 620209/620828 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 137224 event pairs, 1170 based on Foata normal form. 224/11002 useless extension candidates. Maximal degree in co-relation 86675. Up to 3891 conditions per place. [2022-11-02 20:54:07,936 INFO L137 encePairwiseOnDemand]: 116/133 looper letters, 229 selfloop transitions, 16 changer transitions 157/511 dead transitions. [2022-11-02 20:54:07,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 511 transitions, 9018 flow [2022-11-02 20:54:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:54:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-02 20:54:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2552 transitions. [2022-11-02 20:54:07,940 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7379988432620012 [2022-11-02 20:54:07,941 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2552 transitions. [2022-11-02 20:54:07,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2552 transitions. [2022-11-02 20:54:07,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:07,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2552 transitions. [2022-11-02 20:54:07,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.15384615384616) internal successors, (2552), 26 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states 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 20:54:07,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,950 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 133.0) internal successors, (3591), 27 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,951 INFO L175 Difference]: Start difference. First operand has 422 places, 641 transitions, 10273 flow. Second operand 26 states and 2552 transitions. [2022-11-02 20:54:07,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 511 transitions, 9018 flow [2022-11-02 20:54:10,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 511 transitions, 8684 flow, removed 65 selfloop flow, removed 29 redundant places. [2022-11-02 20:54:10,394 INFO L231 Difference]: Finished difference. Result has 416 places, 351 transitions, 4648 flow [2022-11-02 20:54:10,396 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4648, PETRI_PLACES=416, PETRI_TRANSITIONS=351} [2022-11-02 20:54:10,396 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 298 predicate places. [2022-11-02 20:54:10,397 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 351 transitions, 4648 flow [2022-11-02 20:54:10,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 97.25714285714285) internal successors, (3404), 35 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 20:54:10,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:10,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:10,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 20:54:10,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:10,607 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 20:54:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -466718020, now seen corresponding path program 8 times [2022-11-02 20:54:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:10,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188129014] [2022-11-02 20:54:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:14,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188129014] [2022-11-02 20:54:14,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188129014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:14,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514087820] [2022-11-02 20:54:14,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:14,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:14,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:14,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:14,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a846371-5fd3-4f58-b8d1-620a4f782113/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:54:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-02 20:54:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:16,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:16,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-11-02 20:54:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:17,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:17,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2022-11-02 20:54:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:19,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514087820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:19,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:19,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 22, 22] total 68 [2022-11-02 20:54:19,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672105621] [2022-11-02 20:54:19,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:54:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:54:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=3987, Unknown=0, NotChecked=0, Total=4556 [2022-11-02 20:54:19,869 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-11-02 20:54:19,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 351 transitions, 4648 flow. Second operand has 68 states, 68 states have (on average 61.11764705882353) internal successors, (4156), 68 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states 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 20:54:19,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:19,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-11-02 20:54:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand