./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 15:48:31,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:48:31,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:48:31,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:48:31,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:48:31,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:48:31,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:48:31,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:48:31,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:48:31,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:48:31,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:48:31,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:48:31,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:48:31,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:48:31,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:48:31,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:48:31,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:48:31,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:48:31,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:48:31,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:48:31,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:48:31,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:48:31,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:48:31,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:48:31,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:48:31,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:48:31,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:48:31,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:48:31,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:48:31,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:48:31,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:48:31,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:48:31,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:48:31,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:48:31,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:48:31,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:48:31,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:48:31,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:48:31,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:48:31,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:48:31,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:48:31,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:48:31,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:48:31,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:48:31,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:48:31,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:48:31,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:48:31,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:48:31,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:48:31,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:48:31,703 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:48:31,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:48:31,704 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:48:31,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:48:31,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:48:31,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:48:31,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:48:31,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:48:31,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:48:31,707 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:48:31,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:48:31,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:48:31,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:48:31,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:48:31,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:48:31,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:48:31,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:48:31,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:48:31,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:48:31,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:48:31,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:48:31,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:48:31,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:48:31,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:48:31,711 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:48:31,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:48:31,712 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2022-11-25 15:48:31,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:48:32,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:48:32,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:48:32,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:48:32,035 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:48:32,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-11-25 15:48:35,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:48:35,423 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:48:35,423 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-11-25 15:48:35,438 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/data/e3419495d/953dd03d7b5641038da6daa1a5ec68dc/FLAG158fa4a0e [2022-11-25 15:48:35,453 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/data/e3419495d/953dd03d7b5641038da6daa1a5ec68dc [2022-11-25 15:48:35,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:48:35,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:48:35,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:48:35,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:48:35,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:48:35,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:48:35" (1/1) ... [2022-11-25 15:48:35,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b8b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:35, skipping insertion in model container [2022-11-25 15:48:35,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:48:35" (1/1) ... [2022-11-25 15:48:35,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:48:35,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:48:35,928 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-11-25 15:48:35,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:48:35,956 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:48:36,012 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-11-25 15:48:36,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:48:36,069 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:48:36,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36 WrapperNode [2022-11-25 15:48:36,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:48:36,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:48:36,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:48:36,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:48:36,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,113 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2022-11-25 15:48:36,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:48:36,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:48:36,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:48:36,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:48:36,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,169 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:48:36,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:48:36,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:48:36,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:48:36,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (1/1) ... [2022-11-25 15:48:36,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:48:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:36,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:48:36,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c736ef-fbda-44f4-b280-a05c3ff639be/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:48:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:48:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-25 15:48:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-25 15:48:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 15:48:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 15:48:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:48:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:48:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:48:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:48:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:48:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:48:36,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:48:36,269 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:48:36,419 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:48:36,426 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:48:36,804 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:48:36,993 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:48:36,993 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:48:36,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:48:36 BoogieIcfgContainer [2022-11-25 15:48:36,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:48:36,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:48:36,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:48:37,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:48:37,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:48:35" (1/3) ... [2022-11-25 15:48:37,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:48:37, skipping insertion in model container [2022-11-25 15:48:37,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:48:36" (2/3) ... [2022-11-25 15:48:37,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:48:37, skipping insertion in model container [2022-11-25 15:48:37,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:48:36" (3/3) ... [2022-11-25 15:48:37,008 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2022-11-25 15:48:37,020 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:48:37,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:48:37,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:48:37,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:48:37,110 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:48:37,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2022-11-25 15:48:37,191 INFO L130 PetriNetUnfolder]: 6/90 cut-off events. [2022-11-25 15:48:37,191 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 6/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-11-25 15:48:37,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2022-11-25 15:48:37,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2022-11-25 15:48:37,206 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:48:37,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 166 flow [2022-11-25 15:48:37,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 166 flow [2022-11-25 15:48:37,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 166 flow [2022-11-25 15:48:37,249 INFO L130 PetriNetUnfolder]: 6/90 cut-off events. [2022-11-25 15:48:37,249 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 6/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-11-25 15:48:37,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 1900 [2022-11-25 15:48:40,021 INFO L134 LiptonReduction]: Checked pairs total: 3251 [2022-11-25 15:48:40,022 INFO L136 LiptonReduction]: Total number of compositions: 63 [2022-11-25 15:48:40,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:48:40,059 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;@55ab8255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:48:40,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:48:40,073 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 15:48:40,074 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:40,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:40,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:48:40,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:48:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 505735998, now seen corresponding path program 1 times [2022-11-25 15:48:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:40,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345321290] [2022-11-25 15:48:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:40,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345321290] [2022-11-25 15:48:40,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345321290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:40,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:40,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:48:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453591408] [2022-11-25 15:48:40,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:40,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:40,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:40,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 143 [2022-11-25 15:48:40,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:40,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 143 [2022-11-25 15:48:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:40,652 INFO L130 PetriNetUnfolder]: 182/310 cut-off events. [2022-11-25 15:48:40,652 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:48:40,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 310 events. 182/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1112 event pairs, 51 based on Foata normal form. 12/311 useless extension candidates. Maximal degree in co-relation 620. Up to 222 conditions per place. [2022-11-25 15:48:40,666 INFO L137 encePairwiseOnDemand]: 137/143 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-25 15:48:40,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 102 flow [2022-11-25 15:48:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2022-11-25 15:48:40,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-11-25 15:48:40,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2022-11-25 15:48:40,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2022-11-25 15:48:40,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:40,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2022-11-25 15:48:40,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,693 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 209 transitions. [2022-11-25 15:48:40,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 102 flow [2022-11-25 15:48:40,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:40,698 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 57 flow [2022-11-25 15:48:40,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2022-11-25 15:48:40,704 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2022-11-25 15:48:40,704 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 57 flow [2022-11-25 15:48:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:40,705 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:40,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:48:40,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:48:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 359998239, now seen corresponding path program 1 times [2022-11-25 15:48:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899964803] [2022-11-25 15:48:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:48:40,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:48:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:48:40,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:48:40,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:48:40,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 15:48:40,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 15:48:40,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-25 15:48:40,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 15:48:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:48:40,767 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:48:40,770 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:48:40,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 15:48:40,806 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:48:40,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2022-11-25 15:48:40,828 INFO L130 PetriNetUnfolder]: 8/131 cut-off events. [2022-11-25 15:48:40,828 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:48:40,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 131 events. 8/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 140. Up to 6 conditions per place. [2022-11-25 15:48:40,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2022-11-25 15:48:40,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2022-11-25 15:48:40,831 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:48:40,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 107 transitions, 229 flow [2022-11-25 15:48:40,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 107 transitions, 229 flow [2022-11-25 15:48:40,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2022-11-25 15:48:40,872 INFO L130 PetriNetUnfolder]: 8/131 cut-off events. [2022-11-25 15:48:40,872 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:48:40,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 8/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 248 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 116. Up to 6 conditions per place. [2022-11-25 15:48:40,878 INFO L119 LiptonReduction]: Number of co-enabled transitions 4896 [2022-11-25 15:48:43,729 INFO L134 LiptonReduction]: Checked pairs total: 13454 [2022-11-25 15:48:43,729 INFO L136 LiptonReduction]: Total number of compositions: 75 [2022-11-25 15:48:43,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:48:43,732 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;@55ab8255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:48:43,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 15:48:43,735 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 15:48:43,736 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:43,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:43,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:48:43,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:48:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 733401742, now seen corresponding path program 1 times [2022-11-25 15:48:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263947156] [2022-11-25 15:48:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:43,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:43,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263947156] [2022-11-25 15:48:43,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263947156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:43,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:43,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:48:43,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836243540] [2022-11-25 15:48:43,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:43,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2022-11-25 15:48:43,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:43,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:43,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2022-11-25 15:48:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:44,365 INFO L130 PetriNetUnfolder]: 2388/3580 cut-off events. [2022-11-25 15:48:44,365 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-11-25 15:48:44,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7115 conditions, 3580 events. 2388/3580 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19924 event pairs, 709 based on Foata normal form. 27/3404 useless extension candidates. Maximal degree in co-relation 7104. Up to 3163 conditions per place. [2022-11-25 15:48:44,392 INFO L137 encePairwiseOnDemand]: 190/197 looper letters, 37 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-25 15:48:44,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 200 flow [2022-11-25 15:48:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2022-11-25 15:48:44,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5109983079526227 [2022-11-25 15:48:44,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2022-11-25 15:48:44,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2022-11-25 15:48:44,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:44,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2022-11-25 15:48:44,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:44,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:44,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:44,414 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 101 flow. Second operand 3 states and 302 transitions. [2022-11-25 15:48:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 200 flow [2022-11-25 15:48:44,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 50 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:44,416 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2022-11-25 15:48:44,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 15:48:44,420 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2022-11-25 15:48:44,420 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2022-11-25 15:48:44,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:44,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:44,421 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:44,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:48:44,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:48:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash 896210847, now seen corresponding path program 1 times [2022-11-25 15:48:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:44,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205575769] [2022-11-25 15:48:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:44,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:44,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205575769] [2022-11-25 15:48:44,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205575769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:44,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:44,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:48:44,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449071542] [2022-11-25 15:48:44,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:44,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:48:44,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:48:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:48:44,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2022-11-25 15:48:44,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:44,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:44,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2022-11-25 15:48:44,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:45,527 INFO L130 PetriNetUnfolder]: 3237/4805 cut-off events. [2022-11-25 15:48:45,528 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-11-25 15:48:45,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10127 conditions, 4805 events. 3237/4805 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28458 event pairs, 745 based on Foata normal form. 48/4632 useless extension candidates. Maximal degree in co-relation 10114. Up to 3399 conditions per place. [2022-11-25 15:48:45,560 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 78 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2022-11-25 15:48:45,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 104 transitions, 456 flow [2022-11-25 15:48:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:48:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:48:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 671 transitions. [2022-11-25 15:48:45,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4865844815083394 [2022-11-25 15:48:45,567 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 671 transitions. [2022-11-25 15:48:45,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 671 transitions. [2022-11-25 15:48:45,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:45,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 671 transitions. [2022-11-25 15:48:45,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:45,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:45,574 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:45,574 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 671 transitions. [2022-11-25 15:48:45,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 104 transitions, 456 flow [2022-11-25 15:48:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:45,577 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2022-11-25 15:48:45,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2022-11-25 15:48:45,578 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2022-11-25 15:48:45,578 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2022-11-25 15:48:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:45,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:45,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:48:45,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:48:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2029815620, now seen corresponding path program 1 times [2022-11-25 15:48:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713469181] [2022-11-25 15:48:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713469181] [2022-11-25 15:48:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713469181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:45,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:45,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:48:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722849527] [2022-11-25 15:48:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:48:45,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:48:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:48:45,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2022-11-25 15:48:45,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 81.71428571428571) internal successors, (572), 7 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:45,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:45,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2022-11-25 15:48:45,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:46,864 INFO L130 PetriNetUnfolder]: 3823/5735 cut-off events. [2022-11-25 15:48:46,864 INFO L131 PetriNetUnfolder]: For 3374/3418 co-relation queries the response was YES. [2022-11-25 15:48:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 5735 events. 3823/5735 cut-off events. For 3374/3418 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35726 event pairs, 545 based on Foata normal form. 100/5628 useless extension candidates. Maximal degree in co-relation 14477. Up to 3195 conditions per place. [2022-11-25 15:48:46,909 INFO L137 encePairwiseOnDemand]: 186/197 looper letters, 103 selfloop transitions, 23 changer transitions 0/135 dead transitions. [2022-11-25 15:48:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 135 transitions, 716 flow [2022-11-25 15:48:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:48:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:48:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2022-11-25 15:48:46,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47772137619853355 [2022-11-25 15:48:46,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2022-11-25 15:48:46,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2022-11-25 15:48:46,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:46,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2022-11-25 15:48:46,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:46,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:46,921 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:46,921 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 847 transitions. [2022-11-25 15:48:46,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 135 transitions, 716 flow [2022-11-25 15:48:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 135 transitions, 708 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:46,939 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2022-11-25 15:48:46,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-11-25 15:48:46,941 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2022-11-25 15:48:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2022-11-25 15:48:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.71428571428571) internal successors, (572), 7 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:46,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:46,943 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:48:46,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 15:48:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1257714721, now seen corresponding path program 1 times [2022-11-25 15:48:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:46,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574536684] [2022-11-25 15:48:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:48:46,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:48:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:48:46,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:48:46,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:48:46,997 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 15:48:46,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 15:48:46,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-25 15:48:46,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 15:48:46,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 15:48:46,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:48:46,999 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 15:48:47,000 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:48:47,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 15:48:47,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:48:47,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 164 transitions, 370 flow [2022-11-25 15:48:47,077 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2022-11-25 15:48:47,077 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:48:47,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 172 events. 10/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 416 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2022-11-25 15:48:47,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 164 transitions, 370 flow [2022-11-25 15:48:47,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 135 transitions, 294 flow [2022-11-25 15:48:47,080 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:48:47,080 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 135 transitions, 294 flow [2022-11-25 15:48:47,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 135 transitions, 294 flow [2022-11-25 15:48:47,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 135 transitions, 294 flow [2022-11-25 15:48:47,101 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2022-11-25 15:48:47,101 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:48:47,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 172 events. 10/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 416 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2022-11-25 15:48:47,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 9404 [2022-11-25 15:48:50,827 INFO L134 LiptonReduction]: Checked pairs total: 30084 [2022-11-25 15:48:50,827 INFO L136 LiptonReduction]: Total number of compositions: 93 [2022-11-25 15:48:50,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:48:50,830 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;@55ab8255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:48:50,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 15:48:50,832 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-11-25 15:48:50,832 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:50,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:50,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:48:50,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 15:48:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1018153403, now seen corresponding path program 1 times [2022-11-25 15:48:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:50,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407965544] [2022-11-25 15:48:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:50,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407965544] [2022-11-25 15:48:50,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407965544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:50,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:50,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:48:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785457158] [2022-11-25 15:48:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:50,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:50,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2022-11-25 15:48:50,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:50,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:50,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2022-11-25 15:48:50,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:57,425 INFO L130 PetriNetUnfolder]: 41727/56400 cut-off events. [2022-11-25 15:48:57,432 INFO L131 PetriNetUnfolder]: For 3305/3305 co-relation queries the response was YES. [2022-11-25 15:48:57,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112640 conditions, 56400 events. 41727/56400 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 353421 event pairs, 14741 based on Foata normal form. 0/50319 useless extension candidates. Maximal degree in co-relation 112628. Up to 52818 conditions per place. [2022-11-25 15:48:57,826 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 53 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2022-11-25 15:48:57,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 288 flow [2022-11-25 15:48:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2022-11-25 15:48:57,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5084306095979247 [2022-11-25 15:48:57,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2022-11-25 15:48:57,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2022-11-25 15:48:57,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:57,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2022-11-25 15:48:57,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:57,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:57,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:57,834 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 136 flow. Second operand 3 states and 392 transitions. [2022-11-25 15:48:57,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 288 flow [2022-11-25 15:48:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 279 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:57,838 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 151 flow [2022-11-25 15:48:57,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2022-11-25 15:48:57,839 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2022-11-25 15:48:57,839 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 151 flow [2022-11-25 15:48:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:57,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:57,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:48:57,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 15:48:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1705590222, now seen corresponding path program 1 times [2022-11-25 15:48:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940634772] [2022-11-25 15:48:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940634772] [2022-11-25 15:48:57,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940634772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:57,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:57,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:48:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759363592] [2022-11-25 15:48:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:48:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:48:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:48:58,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-25 15:48:58,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:58,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:58,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-25 15:48:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:05,799 INFO L130 PetriNetUnfolder]: 58976/79357 cut-off events. [2022-11-25 15:49:05,799 INFO L131 PetriNetUnfolder]: For 9471/9471 co-relation queries the response was YES. [2022-11-25 15:49:05,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166636 conditions, 79357 events. 58976/79357 cut-off events. For 9471/9471 co-relation queries the response was YES. Maximal size of possible extension queue 2604. Compared 517428 event pairs, 16303 based on Foata normal form. 436/75212 useless extension candidates. Maximal degree in co-relation 166622. Up to 59465 conditions per place. [2022-11-25 15:49:06,266 INFO L137 encePairwiseOnDemand]: 243/257 looper letters, 126 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2022-11-25 15:49:06,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 164 transitions, 738 flow [2022-11-25 15:49:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:49:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:49:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 904 transitions. [2022-11-25 15:49:06,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5025013896609227 [2022-11-25 15:49:06,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 904 transitions. [2022-11-25 15:49:06,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 904 transitions. [2022-11-25 15:49:06,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:06,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 904 transitions. [2022-11-25 15:49:06,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.14285714285714) internal successors, (904), 7 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:06,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:06,277 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:06,278 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 151 flow. Second operand 7 states and 904 transitions. [2022-11-25 15:49:06,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 164 transitions, 738 flow [2022-11-25 15:49:06,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 164 transitions, 732 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:49:06,287 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 342 flow [2022-11-25 15:49:06,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2022-11-25 15:49:06,288 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2022-11-25 15:49:06,288 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 342 flow [2022-11-25 15:49:06,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:06,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:06,289 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:49:06,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 15:49:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1605268230, now seen corresponding path program 1 times [2022-11-25 15:49:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:06,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137531336] [2022-11-25 15:49:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:06,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:49:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:06,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137531336] [2022-11-25 15:49:06,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137531336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:06,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:49:06,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:49:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395508542] [2022-11-25 15:49:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:06,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:49:06,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:49:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:49:06,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2022-11-25 15:49:06,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 106.71428571428571) internal successors, (747), 7 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:06,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:06,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2022-11-25 15:49:06,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:49:17,526 INFO L130 PetriNetUnfolder]: 75627/102574 cut-off events. [2022-11-25 15:49:17,526 INFO L131 PetriNetUnfolder]: For 67027/68051 co-relation queries the response was YES. [2022-11-25 15:49:17,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267681 conditions, 102574 events. 75627/102574 cut-off events. For 67027/68051 co-relation queries the response was YES. Maximal size of possible extension queue 3505. Compared 705478 event pairs, 15243 based on Foata normal form. 1058/98309 useless extension candidates. Maximal degree in co-relation 267662. Up to 60295 conditions per place. [2022-11-25 15:49:18,360 INFO L137 encePairwiseOnDemand]: 241/257 looper letters, 189 selfloop transitions, 47 changer transitions 0/247 dead transitions. [2022-11-25 15:49:18,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 247 transitions, 1376 flow [2022-11-25 15:49:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:49:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:49:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1288 transitions. [2022-11-25 15:49:18,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5011673151750973 [2022-11-25 15:49:18,370 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1288 transitions. [2022-11-25 15:49:18,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1288 transitions. [2022-11-25 15:49:18,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:49:18,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1288 transitions. [2022-11-25 15:49:18,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 128.8) internal successors, (1288), 10 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:18,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:18,381 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:18,382 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 342 flow. Second operand 10 states and 1288 transitions. [2022-11-25 15:49:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 247 transitions, 1376 flow [2022-11-25 15:49:18,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 247 transitions, 1362 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 15:49:18,595 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 617 flow [2022-11-25 15:49:18,595 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=617, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2022-11-25 15:49:18,597 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2022-11-25 15:49:18,597 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 617 flow [2022-11-25 15:49:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.71428571428571) internal successors, (747), 7 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:18,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:49:18,599 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:49:18,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 15:49:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash -308751759, now seen corresponding path program 1 times [2022-11-25 15:49:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:18,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606129384] [2022-11-25 15:49:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606129384] [2022-11-25 15:49:18,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606129384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:18,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:49:18,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:49:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098027359] [2022-11-25 15:49:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:49:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:49:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:49:18,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-25 15:49:18,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 617 flow. Second operand has 5 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:49:18,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:49:18,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-25 15:49:18,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand