./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --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_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/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_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/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_e095e281-a22d-4446-8d8b-99c8a792b734/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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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 18:18:49,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:18:49,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:18:49,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:18:49,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:18:49,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:18:49,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:18:49,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:18:49,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:18:49,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:18:49,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:18:49,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:18:49,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:18:49,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:18:49,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:18:49,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:18:49,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:18:49,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:18:49,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:18:49,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:18:49,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:18:49,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:18:49,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:18:49,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:18:49,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:18:49,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:18:49,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:18:49,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:18:49,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:18:49,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:18:49,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:18:49,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:18:49,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:18:49,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:18:49,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:18:49,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:18:49,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:18:49,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:18:49,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:18:49,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:18:49,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:18:49,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:18:49,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:18:49,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:18:49,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:18:49,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:18:49,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:18:49,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:18:49,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:18:49,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:18:49,484 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:18:49,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:18:49,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:18:49,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:18:49,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:18:49,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:18:49,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:18:49,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:18:49,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:18:49,487 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:18:49,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:18:49,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:18:49,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:18:49,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:18:49,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:18:49,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:18:49,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:18:49,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:18:49,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:18:49,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:18:49,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:18:49,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:18:49,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:18:49,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:18:49,492 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:18:49,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:18:49,493 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_e095e281-a22d-4446-8d8b-99c8a792b734/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-25 18:18:49,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:18:49,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:18:49,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:18:49,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:18:49,992 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:18:49,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 18:18:53,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:18:53,464 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:18:53,465 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-25 18:18:53,475 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/data/0ab51ee43/f4855f7e10f0426e8616e158f5dc011b/FLAG7d292df16 [2022-11-25 18:18:53,496 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/data/0ab51ee43/f4855f7e10f0426e8616e158f5dc011b [2022-11-25 18:18:53,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:18:53,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:18:53,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:18:53,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:18:53,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:18:53,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a74600d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53, skipping insertion in model container [2022-11-25 18:18:53,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:18:53,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:18:53,800 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_e095e281-a22d-4446-8d8b-99c8a792b734/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 18:18:53,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:18:53,834 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:18:53,866 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_e095e281-a22d-4446-8d8b-99c8a792b734/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-25 18:18:53,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:18:53,889 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:18:53,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53 WrapperNode [2022-11-25 18:18:53,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:18:53,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:18:53,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:18:53,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:18:53,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,969 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2022-11-25 18:18:53,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:18:53,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:18:53,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:18:53,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:18:53,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:53,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:54,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:54,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:54,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:18:54,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:18:54,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:18:54,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:18:54,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (1/1) ... [2022-11-25 18:18:54,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:18:54,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:18:54,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:18:54,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:18:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:18:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:18:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:18:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:18:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:18:54,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:18:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:18:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:18:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:18:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:18:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:18:54,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:18:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:18:54,134 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 18:18:54,289 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:18:54,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:18:54,936 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:18:54,951 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:18:54,962 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:18:54,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:54 BoogieIcfgContainer [2022-11-25 18:18:54,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:18:54,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:18:54,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:18:54,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:18:54,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:18:53" (1/3) ... [2022-11-25 18:18:54,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164a0d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:54, skipping insertion in model container [2022-11-25 18:18:54,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:18:53" (2/3) ... [2022-11-25 18:18:54,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164a0d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:18:54, skipping insertion in model container [2022-11-25 18:18:54,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:54" (3/3) ... [2022-11-25 18:18:54,986 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-25 18:18:54,997 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:18:55,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:18:55,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:18:55,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:18:55,163 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:18:55,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 374 transitions, 764 flow [2022-11-25 18:18:55,419 INFO L130 PetriNetUnfolder]: 28/372 cut-off events. [2022-11-25 18:18:55,420 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:18:55,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 372 events. 28/372 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 359 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 293. Up to 2 conditions per place. [2022-11-25 18:18:55,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 353 places, 374 transitions, 764 flow [2022-11-25 18:18:55,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 363 transitions, 738 flow [2022-11-25 18:18:55,448 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:18:55,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 363 transitions, 738 flow [2022-11-25 18:18:55,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 363 transitions, 738 flow [2022-11-25 18:18:55,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 363 transitions, 738 flow [2022-11-25 18:18:55,664 INFO L130 PetriNetUnfolder]: 28/363 cut-off events. [2022-11-25 18:18:55,664 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:18:55,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 363 events. 28/363 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 358 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 293. Up to 2 conditions per place. [2022-11-25 18:18:55,684 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2022-11-25 18:19:13,686 INFO L134 LiptonReduction]: Checked pairs total: 7858 [2022-11-25 18:19:13,687 INFO L136 LiptonReduction]: Total number of compositions: 430 [2022-11-25 18:19:13,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:19:13,714 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;@7e1e642e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:19:13,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:19:13,723 INFO L130 PetriNetUnfolder]: 6/25 cut-off events. [2022-11-25 18:19:13,723 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:19:13,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:13,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:13,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1151960367, now seen corresponding path program 1 times [2022-11-25 18:19:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197011040] [2022-11-25 18:19:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:14,297 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 18:19:14,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197011040] [2022-11-25 18:19:14,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197011040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:14,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:14,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:19:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380039946] [2022-11-25 18:19:14,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:14,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:14,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 804 [2022-11-25 18:19:14,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 18:19:14,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:14,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 804 [2022-11-25 18:19:14,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:14,544 INFO L130 PetriNetUnfolder]: 61/120 cut-off events. [2022-11-25 18:19:14,544 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 18:19:14,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 120 events. 61/120 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 279 event pairs, 33 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 220. Up to 91 conditions per place. [2022-11-25 18:19:14,547 INFO L137 encePairwiseOnDemand]: 800/804 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2022-11-25 18:19:14,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 139 flow [2022-11-25 18:19:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1058 transitions. [2022-11-25 18:19:14,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4386401326699834 [2022-11-25 18:19:14,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1058 transitions. [2022-11-25 18:19:14,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1058 transitions. [2022-11-25 18:19:14,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:14,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1058 transitions. [2022-11-25 18:19:14,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states 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 18:19:14,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 804.0) internal successors, (3216), 4 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 18:19:14,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 804.0) internal successors, (3216), 4 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 18:19:14,614 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 1058 transitions. [2022-11-25 18:19:14,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 139 flow [2022-11-25 18:19:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:19:14,621 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 74 flow [2022-11-25 18:19:14,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-11-25 18:19:14,628 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2022-11-25 18:19:14,628 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 74 flow [2022-11-25 18:19:14,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 18:19:14,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:14,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:19:14,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1934972582, now seen corresponding path program 1 times [2022-11-25 18:19:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:14,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302983100] [2022-11-25 18:19:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:15,048 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 18:19:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:15,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302983100] [2022-11-25 18:19:15,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302983100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:15,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:15,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:19:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323703817] [2022-11-25 18:19:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:15,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:19:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:19:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:19:15,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 804 [2022-11-25 18:19:15,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 18:19:15,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:15,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 804 [2022-11-25 18:19:15,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:15,254 INFO L130 PetriNetUnfolder]: 61/121 cut-off events. [2022-11-25 18:19:15,254 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 18:19:15,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 121 events. 61/121 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 279 event pairs, 45 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 183. Up to 121 conditions per place. [2022-11-25 18:19:15,255 INFO L137 encePairwiseOnDemand]: 801/804 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2022-11-25 18:19:15,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 132 flow [2022-11-25 18:19:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:19:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:19:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1045 transitions. [2022-11-25 18:19:15,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332504145936982 [2022-11-25 18:19:15,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1045 transitions. [2022-11-25 18:19:15,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1045 transitions. [2022-11-25 18:19:15,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:15,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1045 transitions. [2022-11-25 18:19:15,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.3333333333333) internal successors, (1045), 3 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states 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 18:19:15,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 804.0) internal successors, (3216), 4 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 18:19:15,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 804.0) internal successors, (3216), 4 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 18:19:15,272 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 74 flow. Second operand 3 states and 1045 transitions. [2022-11-25 18:19:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 132 flow [2022-11-25 18:19:15,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:15,274 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 80 flow [2022-11-25 18:19:15,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2022-11-25 18:19:15,275 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2022-11-25 18:19:15,275 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 80 flow [2022-11-25 18:19:15,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 18:19:15,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:15,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:19:15,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:15,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1337550856, now seen corresponding path program 1 times [2022-11-25 18:19:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928424433] [2022-11-25 18:19:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:15,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:19:15,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928424433] [2022-11-25 18:19:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928424433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:15,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:15,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:19:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434165939] [2022-11-25 18:19:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:19:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:19:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:19:15,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 804 [2022-11-25 18:19:15,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 18:19:15,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:15,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 804 [2022-11-25 18:19:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:15,648 INFO L130 PetriNetUnfolder]: 61/122 cut-off events. [2022-11-25 18:19:15,648 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:19:15,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 122 events. 61/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 279 event pairs, 45 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 281. Up to 120 conditions per place. [2022-11-25 18:19:15,650 INFO L137 encePairwiseOnDemand]: 799/804 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2022-11-25 18:19:15,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 140 flow [2022-11-25 18:19:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:19:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:19:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1385 transitions. [2022-11-25 18:19:15,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4306592039800995 [2022-11-25 18:19:15,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1385 transitions. [2022-11-25 18:19:15,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1385 transitions. [2022-11-25 18:19:15,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:15,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1385 transitions. [2022-11-25 18:19:15,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 346.25) internal successors, (1385), 4 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 18:19:15,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:15,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:15,669 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 80 flow. Second operand 4 states and 1385 transitions. [2022-11-25 18:19:15,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 140 flow [2022-11-25 18:19:15,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:15,671 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 94 flow [2022-11-25 18:19:15,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2022-11-25 18:19:15,671 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2022-11-25 18:19:15,672 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 94 flow [2022-11-25 18:19:15,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 18:19:15,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:15,673 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:19:15,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 653419403, now seen corresponding path program 1 times [2022-11-25 18:19:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876629590] [2022-11-25 18:19:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:19:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:15,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876629590] [2022-11-25 18:19:15,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876629590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:15,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521758453] [2022-11-25 18:19:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:15,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:15,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:15,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:15,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:19:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:19:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:16,140 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 18:19:16,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:19:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521758453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:16,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:19:16,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 18:19:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775233900] [2022-11-25 18:19:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:16,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:19:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:19:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:19:16,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 804 [2022-11-25 18:19:16,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 18:19:16,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:16,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 804 [2022-11-25 18:19:16,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:16,352 INFO L130 PetriNetUnfolder]: 61/123 cut-off events. [2022-11-25 18:19:16,352 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:19:16,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 123 events. 61/123 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 279 event pairs, 45 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 281. Up to 122 conditions per place. [2022-11-25 18:19:16,354 INFO L137 encePairwiseOnDemand]: 800/804 looper letters, 27 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2022-11-25 18:19:16,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 156 flow [2022-11-25 18:19:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:19:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:19:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1384 transitions. [2022-11-25 18:19:16,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2022-11-25 18:19:16,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:16,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 18:19:16,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:16,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:16,374 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 94 flow. Second operand 4 states and 1384 transitions. [2022-11-25 18:19:16,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 156 flow [2022-11-25 18:19:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:16,376 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 107 flow [2022-11-25 18:19:16,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2022-11-25 18:19:16,378 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2022-11-25 18:19:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 107 flow [2022-11-25 18:19:16,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 18:19:16,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:16,379 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:16,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:16,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1710876773, now seen corresponding path program 1 times [2022-11-25 18:19:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045630592] [2022-11-25 18:19:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:19:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:16,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045630592] [2022-11-25 18:19:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045630592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:16,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:19:16,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697654952] [2022-11-25 18:19:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:19:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:19:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:19:16,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 804 [2022-11-25 18:19:16,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 344.5) internal successors, (1378), 4 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states 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 18:19:16,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:16,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 804 [2022-11-25 18:19:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:16,924 INFO L130 PetriNetUnfolder]: 61/124 cut-off events. [2022-11-25 18:19:16,925 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 18:19:16,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 124 events. 61/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 279 event pairs, 45 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 288. Up to 123 conditions per place. [2022-11-25 18:19:16,926 INFO L137 encePairwiseOnDemand]: 800/804 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2022-11-25 18:19:16,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 171 flow [2022-11-25 18:19:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:19:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:19:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1384 transitions. [2022-11-25 18:19:16,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2022-11-25 18:19:16,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:16,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1384 transitions. [2022-11-25 18:19:16,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 18:19:16,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:16,944 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 804.0) internal successors, (4020), 5 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 18:19:16,945 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 107 flow. Second operand 4 states and 1384 transitions. [2022-11-25 18:19:16,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 171 flow [2022-11-25 18:19:16,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 165 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:16,947 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2022-11-25 18:19:16,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-25 18:19:16,948 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2022-11-25 18:19:16,948 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2022-11-25 18:19:16,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.5) internal successors, (1378), 4 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states 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 18:19:16,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:16,949 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:16,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:19:16,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1566966628, now seen corresponding path program 1 times [2022-11-25 18:19:16,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:16,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999733697] [2022-11-25 18:19:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:16,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:18,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:18,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999733697] [2022-11-25 18:19:18,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999733697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:18,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:18,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054471383] [2022-11-25 18:19:18,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:18,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:19,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 804 [2022-11-25 18:19:19,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 326.8333333333333) internal successors, (1961), 6 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 18:19:19,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:19,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 804 [2022-11-25 18:19:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:19,656 INFO L130 PetriNetUnfolder]: 110/235 cut-off events. [2022-11-25 18:19:19,656 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:19:19,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 235 events. 110/235 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 825 event pairs, 34 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 555. Up to 111 conditions per place. [2022-11-25 18:19:19,660 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 57 selfloop transitions, 5 changer transitions 5/67 dead transitions. [2022-11-25 18:19:19,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 67 transitions, 349 flow [2022-11-25 18:19:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:19:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1999 transitions. [2022-11-25 18:19:19,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2022-11-25 18:19:19,668 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1999 transitions. [2022-11-25 18:19:19,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1999 transitions. [2022-11-25 18:19:19,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:19,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1999 transitions. [2022-11-25 18:19:19,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 333.1666666666667) internal successors, (1999), 6 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states 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 18:19:19,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:19,693 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:19,693 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 6 states and 1999 transitions. [2022-11-25 18:19:19,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 67 transitions, 349 flow [2022-11-25 18:19:19,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 67 transitions, 343 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:19,700 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 144 flow [2022-11-25 18:19:19,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-11-25 18:19:19,703 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2022-11-25 18:19:19,703 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 144 flow [2022-11-25 18:19:19,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 326.8333333333333) internal successors, (1961), 6 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 18:19:19,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:19,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:19:19,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1473940300, now seen corresponding path program 2 times [2022-11-25 18:19:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62265959] [2022-11-25 18:19:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:21,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:21,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62265959] [2022-11-25 18:19:21,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62265959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:21,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:21,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:19:21,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252865890] [2022-11-25 18:19:21,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:19:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:19:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:22,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 804 [2022-11-25 18:19:22,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 314.875) internal successors, (2519), 8 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states 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 18:19:22,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:22,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 804 [2022-11-25 18:19:22,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:24,124 INFO L130 PetriNetUnfolder]: 142/334 cut-off events. [2022-11-25 18:19:24,125 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-11-25 18:19:24,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 334 events. 142/334 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1513 event pairs, 21 based on Foata normal form. 1/334 useless extension candidates. Maximal degree in co-relation 923. Up to 92 conditions per place. [2022-11-25 18:19:24,128 INFO L137 encePairwiseOnDemand]: 793/804 looper letters, 58 selfloop transitions, 22 changer transitions 5/85 dead transitions. [2022-11-25 18:19:24,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 494 flow [2022-11-25 18:19:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:19:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:19:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3192 transitions. [2022-11-25 18:19:24,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3970149253731343 [2022-11-25 18:19:24,138 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3192 transitions. [2022-11-25 18:19:24,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3192 transitions. [2022-11-25 18:19:24,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:24,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3192 transitions. [2022-11-25 18:19:24,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 319.2) internal successors, (3192), 10 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states 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 18:19:24,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 804.0) internal successors, (8844), 11 states have internal predecessors, (8844), 0 states have call successors, (0), 0 states 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 18:19:24,183 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 804.0) internal successors, (8844), 11 states have internal predecessors, (8844), 0 states have call successors, (0), 0 states 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 18:19:24,183 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 144 flow. Second operand 10 states and 3192 transitions. [2022-11-25 18:19:24,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 494 flow [2022-11-25 18:19:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 490 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:24,189 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 341 flow [2022-11-25 18:19:24,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=341, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2022-11-25 18:19:24,190 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2022-11-25 18:19:24,190 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 341 flow [2022-11-25 18:19:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 314.875) internal successors, (2519), 8 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states 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 18:19:24,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:24,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:24,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:19:24,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -713389344, now seen corresponding path program 3 times [2022-11-25 18:19:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:24,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922647246] [2022-11-25 18:19:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:25,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922647246] [2022-11-25 18:19:25,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922647246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:25,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:25,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:19:25,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387922828] [2022-11-25 18:19:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:25,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:19:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:19:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:26,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 804 [2022-11-25 18:19:26,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 341 flow. Second operand has 8 states, 8 states have (on average 316.875) internal successors, (2535), 8 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 18:19:26,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:26,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 804 [2022-11-25 18:19:26,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:27,118 INFO L130 PetriNetUnfolder]: 142/354 cut-off events. [2022-11-25 18:19:27,118 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2022-11-25 18:19:27,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 354 events. 142/354 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1711 event pairs, 28 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1254. Up to 156 conditions per place. [2022-11-25 18:19:27,122 INFO L137 encePairwiseOnDemand]: 794/804 looper letters, 74 selfloop transitions, 25 changer transitions 6/105 dead transitions. [2022-11-25 18:19:27,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 105 transitions, 784 flow [2022-11-25 18:19:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:19:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2584 transitions. [2022-11-25 18:19:27,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4017412935323383 [2022-11-25 18:19:27,131 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2584 transitions. [2022-11-25 18:19:27,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2584 transitions. [2022-11-25 18:19:27,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:27,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2584 transitions. [2022-11-25 18:19:27,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 18:19:27,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:27,151 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:27,151 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 341 flow. Second operand 8 states and 2584 transitions. [2022-11-25 18:19:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 105 transitions, 784 flow [2022-11-25 18:19:27,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 776 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:19:27,162 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 548 flow [2022-11-25 18:19:27,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2022-11-25 18:19:27,166 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2022-11-25 18:19:27,166 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 548 flow [2022-11-25 18:19:27,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 316.875) internal successors, (2535), 8 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 18:19:27,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:27,168 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:19:27,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1691086312, now seen corresponding path program 4 times [2022-11-25 18:19:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:27,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616418560] [2022-11-25 18:19:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:28,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616418560] [2022-11-25 18:19:28,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616418560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:28,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:28,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112764249] [2022-11-25 18:19:28,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:28,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:28,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:28,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:28,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 804 [2022-11-25 18:19:28,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 326.8333333333333) internal successors, (1961), 6 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 18:19:28,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:28,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 804 [2022-11-25 18:19:28,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:29,431 INFO L130 PetriNetUnfolder]: 140/356 cut-off events. [2022-11-25 18:19:29,432 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-25 18:19:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 356 events. 140/356 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1725 event pairs, 38 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1455. Up to 156 conditions per place. [2022-11-25 18:19:29,436 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 89 selfloop transitions, 15 changer transitions 5/109 dead transitions. [2022-11-25 18:19:29,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 109 transitions, 982 flow [2022-11-25 18:19:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:19:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2006 transitions. [2022-11-25 18:19:29,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4158374792703151 [2022-11-25 18:19:29,443 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2006 transitions. [2022-11-25 18:19:29,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2006 transitions. [2022-11-25 18:19:29,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:29,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2006 transitions. [2022-11-25 18:19:29,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 334.3333333333333) internal successors, (2006), 6 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:29,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:29,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:29,460 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 548 flow. Second operand 6 states and 2006 transitions. [2022-11-25 18:19:29,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 109 transitions, 982 flow [2022-11-25 18:19:29,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 958 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:29,472 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 607 flow [2022-11-25 18:19:29,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2022-11-25 18:19:29,473 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2022-11-25 18:19:29,474 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 607 flow [2022-11-25 18:19:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 326.8333333333333) internal successors, (1961), 6 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 18:19:29,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:29,475 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:29,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:19:29,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1037626982, now seen corresponding path program 1 times [2022-11-25 18:19:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:29,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751613556] [2022-11-25 18:19:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:29,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751613556] [2022-11-25 18:19:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751613556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:30,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:30,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:19:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369809379] [2022-11-25 18:19:30,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:30,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:19:30,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 804 [2022-11-25 18:19:30,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states 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 18:19:30,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:30,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 804 [2022-11-25 18:19:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:30,961 INFO L130 PetriNetUnfolder]: 142/389 cut-off events. [2022-11-25 18:19:30,961 INFO L131 PetriNetUnfolder]: For 1242/1242 co-relation queries the response was YES. [2022-11-25 18:19:30,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 389 events. 142/389 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2039 event pairs, 61 based on Foata normal form. 4/392 useless extension candidates. Maximal degree in co-relation 1625. Up to 197 conditions per place. [2022-11-25 18:19:30,965 INFO L137 encePairwiseOnDemand]: 799/804 looper letters, 65 selfloop transitions, 20 changer transitions 10/95 dead transitions. [2022-11-25 18:19:30,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 940 flow [2022-11-25 18:19:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:19:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:19:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1679 transitions. [2022-11-25 18:19:30,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41766169154228855 [2022-11-25 18:19:30,971 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1679 transitions. [2022-11-25 18:19:30,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1679 transitions. [2022-11-25 18:19:30,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:30,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1679 transitions. [2022-11-25 18:19:30,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 335.8) internal successors, (1679), 5 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states 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 18:19:30,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 804.0) internal successors, (4824), 6 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states 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 18:19:30,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 804.0) internal successors, (4824), 6 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states 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 18:19:30,984 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 607 flow. Second operand 5 states and 1679 transitions. [2022-11-25 18:19:30,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 940 flow [2022-11-25 18:19:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 922 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:30,995 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 709 flow [2022-11-25 18:19:30,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=709, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2022-11-25 18:19:30,997 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2022-11-25 18:19:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 709 flow [2022-11-25 18:19:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states 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 18:19:30,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:30,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:19:31,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash -983371292, now seen corresponding path program 2 times [2022-11-25 18:19:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:31,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171251290] [2022-11-25 18:19:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171251290] [2022-11-25 18:19:31,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171251290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:31,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:31,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864748636] [2022-11-25 18:19:31,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:31,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:32,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 804 [2022-11-25 18:19:32,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 709 flow. Second operand has 6 states, 6 states have (on average 328.8333333333333) internal successors, (1973), 6 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 18:19:32,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:32,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 804 [2022-11-25 18:19:32,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:32,691 INFO L130 PetriNetUnfolder]: 126/358 cut-off events. [2022-11-25 18:19:32,692 INFO L131 PetriNetUnfolder]: For 1452/1452 co-relation queries the response was YES. [2022-11-25 18:19:32,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 358 events. 126/358 cut-off events. For 1452/1452 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1848 event pairs, 67 based on Foata normal form. 2/359 useless extension candidates. Maximal degree in co-relation 1622. Up to 242 conditions per place. [2022-11-25 18:19:32,696 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 69 selfloop transitions, 12 changer transitions 10/91 dead transitions. [2022-11-25 18:19:32,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 958 flow [2022-11-25 18:19:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:19:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1997 transitions. [2022-11-25 18:19:32,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41397180762852404 [2022-11-25 18:19:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1997 transitions. [2022-11-25 18:19:32,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1997 transitions. [2022-11-25 18:19:32,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:32,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1997 transitions. [2022-11-25 18:19:32,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 332.8333333333333) internal successors, (1997), 6 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states 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 18:19:32,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:32,715 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:32,716 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 709 flow. Second operand 6 states and 1997 transitions. [2022-11-25 18:19:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 958 flow [2022-11-25 18:19:32,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 941 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:32,732 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 727 flow [2022-11-25 18:19:32,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=727, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2022-11-25 18:19:32,733 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2022-11-25 18:19:32,733 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 727 flow [2022-11-25 18:19:32,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 328.8333333333333) internal successors, (1973), 6 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 18:19:32,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:32,737 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:32,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:19:32,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1547464556, now seen corresponding path program 3 times [2022-11-25 18:19:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435072081] [2022-11-25 18:19:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:33,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:33,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435072081] [2022-11-25 18:19:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435072081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:33,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:33,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013272925] [2022-11-25 18:19:33,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:34,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 804 [2022-11-25 18:19:34,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 727 flow. Second operand has 6 states, 6 states have (on average 328.8333333333333) internal successors, (1973), 6 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 18:19:34,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:34,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 804 [2022-11-25 18:19:34,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:34,730 INFO L130 PetriNetUnfolder]: 120/342 cut-off events. [2022-11-25 18:19:34,730 INFO L131 PetriNetUnfolder]: For 1470/1470 co-relation queries the response was YES. [2022-11-25 18:19:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 342 events. 120/342 cut-off events. For 1470/1470 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1773 event pairs, 24 based on Foata normal form. 8/349 useless extension candidates. Maximal degree in co-relation 1641. Up to 113 conditions per place. [2022-11-25 18:19:34,734 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 53 selfloop transitions, 7 changer transitions 41/101 dead transitions. [2022-11-25 18:19:34,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 101 transitions, 1064 flow [2022-11-25 18:19:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:19:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:19:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2986 transitions. [2022-11-25 18:19:34,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126589275843007 [2022-11-25 18:19:34,743 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2986 transitions. [2022-11-25 18:19:34,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2986 transitions. [2022-11-25 18:19:34,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:34,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2986 transitions. [2022-11-25 18:19:34,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 331.77777777777777) internal successors, (2986), 9 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states 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 18:19:34,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 804.0) internal successors, (8040), 10 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states 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 18:19:34,769 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 804.0) internal successors, (8040), 10 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states 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 18:19:34,769 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 727 flow. Second operand 9 states and 2986 transitions. [2022-11-25 18:19:34,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 101 transitions, 1064 flow [2022-11-25 18:19:34,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 1048 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 18:19:34,784 INFO L231 Difference]: Finished difference. Result has 89 places, 53 transitions, 472 flow [2022-11-25 18:19:34,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=472, PETRI_PLACES=89, PETRI_TRANSITIONS=53} [2022-11-25 18:19:34,786 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2022-11-25 18:19:34,786 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 53 transitions, 472 flow [2022-11-25 18:19:34,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 328.8333333333333) internal successors, (1973), 6 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 18:19:34,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:34,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:19:34,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash -132674748, now seen corresponding path program 5 times [2022-11-25 18:19:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:34,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614368326] [2022-11-25 18:19:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:35,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:35,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614368326] [2022-11-25 18:19:35,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614368326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:35,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:35,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:19:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34153057] [2022-11-25 18:19:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:19:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:19:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:36,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 804 [2022-11-25 18:19:36,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 53 transitions, 472 flow. Second operand has 9 states, 9 states have (on average 318.55555555555554) internal successors, (2867), 9 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 18:19:36,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:36,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 804 [2022-11-25 18:19:36,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:36,996 INFO L130 PetriNetUnfolder]: 91/254 cut-off events. [2022-11-25 18:19:36,996 INFO L131 PetriNetUnfolder]: For 1178/1178 co-relation queries the response was YES. [2022-11-25 18:19:36,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 254 events. 91/254 cut-off events. For 1178/1178 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 14 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 1139. Up to 107 conditions per place. [2022-11-25 18:19:36,999 INFO L137 encePairwiseOnDemand]: 796/804 looper letters, 57 selfloop transitions, 16 changer transitions 7/80 dead transitions. [2022-11-25 18:19:36,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 773 flow [2022-11-25 18:19:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:19:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2584 transitions. [2022-11-25 18:19:37,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4017412935323383 [2022-11-25 18:19:37,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2584 transitions. [2022-11-25 18:19:37,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2584 transitions. [2022-11-25 18:19:37,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:37,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2584 transitions. [2022-11-25 18:19:37,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 18:19:37,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:37,025 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:37,026 INFO L175 Difference]: Start difference. First operand has 89 places, 53 transitions, 472 flow. Second operand 8 states and 2584 transitions. [2022-11-25 18:19:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 773 flow [2022-11-25 18:19:37,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 688 flow, removed 20 selfloop flow, removed 15 redundant places. [2022-11-25 18:19:37,034 INFO L231 Difference]: Finished difference. Result has 75 places, 54 transitions, 462 flow [2022-11-25 18:19:37,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=462, PETRI_PLACES=75, PETRI_TRANSITIONS=54} [2022-11-25 18:19:37,035 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2022-11-25 18:19:37,035 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 54 transitions, 462 flow [2022-11-25 18:19:37,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 318.55555555555554) internal successors, (2867), 9 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 18:19:37,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:37,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:19:37,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1627938148, now seen corresponding path program 6 times [2022-11-25 18:19:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466873516] [2022-11-25 18:19:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:38,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:38,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466873516] [2022-11-25 18:19:38,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466873516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:38,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:38,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:19:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388148257] [2022-11-25 18:19:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:19:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:19:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:38,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 804 [2022-11-25 18:19:38,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 54 transitions, 462 flow. Second operand has 9 states, 9 states have (on average 318.55555555555554) internal successors, (2867), 9 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 18:19:38,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:38,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 804 [2022-11-25 18:19:38,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:39,275 INFO L130 PetriNetUnfolder]: 90/259 cut-off events. [2022-11-25 18:19:39,275 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-25 18:19:39,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 259 events. 90/259 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1181 event pairs, 17 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 1138. Up to 139 conditions per place. [2022-11-25 18:19:39,278 INFO L137 encePairwiseOnDemand]: 797/804 looper letters, 56 selfloop transitions, 6 changer transitions 11/73 dead transitions. [2022-11-25 18:19:39,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 73 transitions, 707 flow [2022-11-25 18:19:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:19:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2575 transitions. [2022-11-25 18:19:39,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40034203980099503 [2022-11-25 18:19:39,287 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2575 transitions. [2022-11-25 18:19:39,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2575 transitions. [2022-11-25 18:19:39,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:39,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2575 transitions. [2022-11-25 18:19:39,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 321.875) internal successors, (2575), 8 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states 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 18:19:39,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:39,305 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:39,305 INFO L175 Difference]: Start difference. First operand has 75 places, 54 transitions, 462 flow. Second operand 8 states and 2575 transitions. [2022-11-25 18:19:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 73 transitions, 707 flow [2022-11-25 18:19:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 674 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 18:19:39,313 INFO L231 Difference]: Finished difference. Result has 78 places, 54 transitions, 455 flow [2022-11-25 18:19:39,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2022-11-25 18:19:39,314 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2022-11-25 18:19:39,314 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 455 flow [2022-11-25 18:19:39,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 318.55555555555554) internal successors, (2867), 9 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 18:19:39,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:39,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:19:39,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1792856652, now seen corresponding path program 7 times [2022-11-25 18:19:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865220753] [2022-11-25 18:19:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865220753] [2022-11-25 18:19:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865220753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:40,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:40,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:19:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166208872] [2022-11-25 18:19:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:40,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:19:40,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:19:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:41,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 804 [2022-11-25 18:19:41,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 455 flow. Second operand has 10 states, 10 states have (on average 318.3) internal successors, (3183), 10 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states 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 18:19:41,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:41,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 804 [2022-11-25 18:19:41,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:41,912 INFO L130 PetriNetUnfolder]: 86/258 cut-off events. [2022-11-25 18:19:41,912 INFO L131 PetriNetUnfolder]: For 1362/1362 co-relation queries the response was YES. [2022-11-25 18:19:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 258 events. 86/258 cut-off events. For 1362/1362 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1191 event pairs, 23 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 1143. Up to 184 conditions per place. [2022-11-25 18:19:41,915 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 55 selfloop transitions, 6 changer transitions 9/70 dead transitions. [2022-11-25 18:19:41,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 70 transitions, 666 flow [2022-11-25 18:19:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:19:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:19:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2258 transitions. [2022-11-25 18:19:41,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40120824449182657 [2022-11-25 18:19:41,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2258 transitions. [2022-11-25 18:19:41,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2258 transitions. [2022-11-25 18:19:41,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:41,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2258 transitions. [2022-11-25 18:19:41,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 322.57142857142856) internal successors, (2258), 7 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states 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 18:19:41,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:41,939 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:41,939 INFO L175 Difference]: Start difference. First operand has 78 places, 54 transitions, 455 flow. Second operand 7 states and 2258 transitions. [2022-11-25 18:19:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 70 transitions, 666 flow [2022-11-25 18:19:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 651 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-25 18:19:41,947 INFO L231 Difference]: Finished difference. Result has 79 places, 52 transitions, 442 flow [2022-11-25 18:19:41,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=79, PETRI_TRANSITIONS=52} [2022-11-25 18:19:41,949 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2022-11-25 18:19:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 52 transitions, 442 flow [2022-11-25 18:19:41,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 318.3) internal successors, (3183), 10 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states 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 18:19:41,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:41,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:19:41,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash 345954558, now seen corresponding path program 8 times [2022-11-25 18:19:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067617959] [2022-11-25 18:19:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:43,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067617959] [2022-11-25 18:19:43,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067617959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:43,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:43,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:19:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333384493] [2022-11-25 18:19:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:19:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:19:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:19:44,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 804 [2022-11-25 18:19:44,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 52 transitions, 442 flow. Second operand has 13 states, 13 states have (on average 304.7692307692308) internal successors, (3962), 13 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states 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 18:19:44,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:44,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 804 [2022-11-25 18:19:44,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:46,097 INFO L130 PetriNetUnfolder]: 90/312 cut-off events. [2022-11-25 18:19:46,098 INFO L131 PetriNetUnfolder]: For 1823/1823 co-relation queries the response was YES. [2022-11-25 18:19:46,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389 conditions, 312 events. 90/312 cut-off events. For 1823/1823 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1713 event pairs, 9 based on Foata normal form. 3/314 useless extension candidates. Maximal degree in co-relation 1346. Up to 67 conditions per place. [2022-11-25 18:19:46,101 INFO L137 encePairwiseOnDemand]: 791/804 looper letters, 62 selfloop transitions, 24 changer transitions 15/101 dead transitions. [2022-11-25 18:19:46,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 101 transitions, 887 flow [2022-11-25 18:19:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:19:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:19:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4023 transitions. [2022-11-25 18:19:46,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.384902411021814 [2022-11-25 18:19:46,111 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4023 transitions. [2022-11-25 18:19:46,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4023 transitions. [2022-11-25 18:19:46,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:46,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4023 transitions. [2022-11-25 18:19:46,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 309.46153846153845) internal successors, (4023), 13 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states 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 18:19:46,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 804.0) internal successors, (11256), 14 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states 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 18:19:46,137 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 804.0) internal successors, (11256), 14 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states 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 18:19:46,137 INFO L175 Difference]: Start difference. First operand has 79 places, 52 transitions, 442 flow. Second operand 13 states and 4023 transitions. [2022-11-25 18:19:46,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 101 transitions, 887 flow [2022-11-25 18:19:46,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 101 transitions, 853 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-25 18:19:46,163 INFO L231 Difference]: Finished difference. Result has 87 places, 56 transitions, 539 flow [2022-11-25 18:19:46,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=539, PETRI_PLACES=87, PETRI_TRANSITIONS=56} [2022-11-25 18:19:46,165 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2022-11-25 18:19:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 56 transitions, 539 flow [2022-11-25 18:19:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 304.7692307692308) internal successors, (3962), 13 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states 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 18:19:46,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:46,167 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:46,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:19:46,167 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1255618776, now seen corresponding path program 9 times [2022-11-25 18:19:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071421824] [2022-11-25 18:19:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:47,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071421824] [2022-11-25 18:19:47,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071421824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:47,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:47,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:19:47,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590999858] [2022-11-25 18:19:47,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:47,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:19:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:19:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:48,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 804 [2022-11-25 18:19:48,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 56 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 318.3) internal successors, (3183), 10 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states 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 18:19:48,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:48,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 804 [2022-11-25 18:19:48,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:48,449 INFO L130 PetriNetUnfolder]: 82/271 cut-off events. [2022-11-25 18:19:48,449 INFO L131 PetriNetUnfolder]: For 1707/1707 co-relation queries the response was YES. [2022-11-25 18:19:48,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 271 events. 82/271 cut-off events. For 1707/1707 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1356 event pairs, 12 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1302. Up to 139 conditions per place. [2022-11-25 18:19:48,452 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 52 selfloop transitions, 8 changer transitions 10/70 dead transitions. [2022-11-25 18:19:48,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 740 flow [2022-11-25 18:19:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:19:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:19:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2256 transitions. [2022-11-25 18:19:48,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40085287846481876 [2022-11-25 18:19:48,457 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2256 transitions. [2022-11-25 18:19:48,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2256 transitions. [2022-11-25 18:19:48,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:48,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2256 transitions. [2022-11-25 18:19:48,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 322.2857142857143) internal successors, (2256), 7 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states 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 18:19:48,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:48,473 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:48,474 INFO L175 Difference]: Start difference. First operand has 87 places, 56 transitions, 539 flow. Second operand 7 states and 2256 transitions. [2022-11-25 18:19:48,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 740 flow [2022-11-25 18:19:48,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 70 transitions, 701 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-11-25 18:19:48,486 INFO L231 Difference]: Finished difference. Result has 85 places, 53 transitions, 494 flow [2022-11-25 18:19:48,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=85, PETRI_TRANSITIONS=53} [2022-11-25 18:19:48,487 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2022-11-25 18:19:48,487 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 53 transitions, 494 flow [2022-11-25 18:19:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 318.3) internal successors, (3183), 10 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states 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 18:19:48,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:48,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:48,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:19:48,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:48,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1814468810, now seen corresponding path program 4 times [2022-11-25 18:19:48,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:48,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961927359] [2022-11-25 18:19:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961927359] [2022-11-25 18:19:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961927359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:19:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861174837] [2022-11-25 18:19:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:19:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:19:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:50,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 804 [2022-11-25 18:19:50,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 53 transitions, 494 flow. Second operand has 10 states, 10 states have (on average 320.3) internal successors, (3203), 10 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states 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 18:19:50,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:50,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 804 [2022-11-25 18:19:50,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:50,545 INFO L130 PetriNetUnfolder]: 75/273 cut-off events. [2022-11-25 18:19:50,546 INFO L131 PetriNetUnfolder]: For 1910/1910 co-relation queries the response was YES. [2022-11-25 18:19:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 273 events. 75/273 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1397 event pairs, 57 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1303. Up to 197 conditions per place. [2022-11-25 18:19:50,548 INFO L137 encePairwiseOnDemand]: 796/804 looper letters, 55 selfloop transitions, 6 changer transitions 11/72 dead transitions. [2022-11-25 18:19:50,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 72 transitions, 752 flow [2022-11-25 18:19:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:19:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2591 transitions. [2022-11-25 18:19:50,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40282960199004975 [2022-11-25 18:19:50,554 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2591 transitions. [2022-11-25 18:19:50,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2591 transitions. [2022-11-25 18:19:50,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2591 transitions. [2022-11-25 18:19:50,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 323.875) internal successors, (2591), 8 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states 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 18:19:50,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:50,568 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:50,568 INFO L175 Difference]: Start difference. First operand has 85 places, 53 transitions, 494 flow. Second operand 8 states and 2591 transitions. [2022-11-25 18:19:50,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 72 transitions, 752 flow [2022-11-25 18:19:50,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 681 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-25 18:19:50,576 INFO L231 Difference]: Finished difference. Result has 82 places, 51 transitions, 435 flow [2022-11-25 18:19:50,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=435, PETRI_PLACES=82, PETRI_TRANSITIONS=51} [2022-11-25 18:19:50,577 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 55 predicate places. [2022-11-25 18:19:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 51 transitions, 435 flow [2022-11-25 18:19:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 320.3) internal successors, (3203), 10 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states 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 18:19:50,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:50,578 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:19:50,579 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1239423686, now seen corresponding path program 5 times [2022-11-25 18:19:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430730112] [2022-11-25 18:19:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430730112] [2022-11-25 18:19:51,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430730112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:51,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:51,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:19:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938622722] [2022-11-25 18:19:51,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:51,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:19:51,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:19:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:52,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 804 [2022-11-25 18:19:52,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 51 transitions, 435 flow. Second operand has 8 states, 8 states have (on average 322.875) internal successors, (2583), 8 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 18:19:52,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:52,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 804 [2022-11-25 18:19:52,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:52,310 INFO L130 PetriNetUnfolder]: 61/215 cut-off events. [2022-11-25 18:19:52,310 INFO L131 PetriNetUnfolder]: For 1010/1010 co-relation queries the response was YES. [2022-11-25 18:19:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 215 events. 61/215 cut-off events. For 1010/1010 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 950 event pairs, 30 based on Foata normal form. 5/219 useless extension candidates. Maximal degree in co-relation 1009. Up to 139 conditions per place. [2022-11-25 18:19:52,312 INFO L137 encePairwiseOnDemand]: 798/804 looper letters, 31 selfloop transitions, 7 changer transitions 20/58 dead transitions. [2022-11-25 18:19:52,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 58 transitions, 568 flow [2022-11-25 18:19:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:19:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:19:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2276 transitions. [2022-11-25 18:19:52,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40440653873489696 [2022-11-25 18:19:52,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2276 transitions. [2022-11-25 18:19:52,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2276 transitions. [2022-11-25 18:19:52,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:52,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2276 transitions. [2022-11-25 18:19:52,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:19:52,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:52,330 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 804.0) internal successors, (6432), 8 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states 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 18:19:52,330 INFO L175 Difference]: Start difference. First operand has 82 places, 51 transitions, 435 flow. Second operand 7 states and 2276 transitions. [2022-11-25 18:19:52,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 58 transitions, 568 flow [2022-11-25 18:19:52,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 58 transitions, 536 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-25 18:19:52,336 INFO L231 Difference]: Finished difference. Result has 76 places, 36 transitions, 279 flow [2022-11-25 18:19:52,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=76, PETRI_TRANSITIONS=36} [2022-11-25 18:19:52,336 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2022-11-25 18:19:52,337 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 36 transitions, 279 flow [2022-11-25 18:19:52,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 322.875) internal successors, (2583), 8 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 18:19:52,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:52,338 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 18:19:52,338 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1183149230, now seen corresponding path program 6 times [2022-11-25 18:19:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:52,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20325856] [2022-11-25 18:19:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:53,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:53,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20325856] [2022-11-25 18:19:53,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20325856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:53,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:53,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:19:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646721881] [2022-11-25 18:19:53,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:53,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:19:53,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:19:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:19:54,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 804 [2022-11-25 18:19:54,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 36 transitions, 279 flow. Second operand has 11 states, 11 states have (on average 316.09090909090907) internal successors, (3477), 11 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states 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 18:19:54,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:54,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 804 [2022-11-25 18:19:54,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:54,778 INFO L130 PetriNetUnfolder]: 18/75 cut-off events. [2022-11-25 18:19:54,778 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2022-11-25 18:19:54,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 75 events. 18/75 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 161 event pairs, 8 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 359. Up to 47 conditions per place. [2022-11-25 18:19:54,780 INFO L137 encePairwiseOnDemand]: 797/804 looper letters, 29 selfloop transitions, 2 changer transitions 17/48 dead transitions. [2022-11-25 18:19:54,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 48 transitions, 427 flow [2022-11-25 18:19:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:19:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2553 transitions. [2022-11-25 18:19:54,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3969216417910448 [2022-11-25 18:19:54,786 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2553 transitions. [2022-11-25 18:19:54,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2553 transitions. [2022-11-25 18:19:54,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:54,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2553 transitions. [2022-11-25 18:19:54,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.125) internal successors, (2553), 8 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states 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 18:19:54,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:54,802 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 804.0) internal successors, (7236), 9 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states 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 18:19:54,803 INFO L175 Difference]: Start difference. First operand has 76 places, 36 transitions, 279 flow. Second operand 8 states and 2553 transitions. [2022-11-25 18:19:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 48 transitions, 427 flow [2022-11-25 18:19:54,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 312 flow, removed 11 selfloop flow, removed 23 redundant places. [2022-11-25 18:19:54,806 INFO L231 Difference]: Finished difference. Result has 59 places, 31 transitions, 150 flow [2022-11-25 18:19:54,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=150, PETRI_PLACES=59, PETRI_TRANSITIONS=31} [2022-11-25 18:19:54,806 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2022-11-25 18:19:54,807 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 31 transitions, 150 flow [2022-11-25 18:19:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 316.09090909090907) internal successors, (3477), 11 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states 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 18:19:54,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:19:54,808 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:54,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 18:19:54,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:19:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1439024271, now seen corresponding path program 1 times [2022-11-25 18:19:54,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:54,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910894194] [2022-11-25 18:19:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:54,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:19:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:55,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910894194] [2022-11-25 18:19:55,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910894194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:55,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:55,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:19:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085476271] [2022-11-25 18:19:55,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:55,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:19:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:19:55,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:56,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 804 [2022-11-25 18:19:56,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 31 transitions, 150 flow. Second operand has 9 states, 9 states have (on average 322.6666666666667) internal successors, (2904), 9 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 18:19:56,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:19:56,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 804 [2022-11-25 18:19:56,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:19:56,665 INFO L130 PetriNetUnfolder]: 12/51 cut-off events. [2022-11-25 18:19:56,665 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-25 18:19:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 51 events. 12/51 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 193. Up to 18 conditions per place. [2022-11-25 18:19:56,666 INFO L137 encePairwiseOnDemand]: 799/804 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2022-11-25 18:19:56,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 35 transitions, 228 flow [2022-11-25 18:19:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:19:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1950 transitions. [2022-11-25 18:19:56,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40422885572139305 [2022-11-25 18:19:56,670 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1950 transitions. [2022-11-25 18:19:56,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1950 transitions. [2022-11-25 18:19:56,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:19:56,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1950 transitions. [2022-11-25 18:19:56,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 18:19:56,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:56,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 804.0) internal successors, (5628), 7 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states 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 18:19:56,681 INFO L175 Difference]: Start difference. First operand has 59 places, 31 transitions, 150 flow. Second operand 6 states and 1950 transitions. [2022-11-25 18:19:56,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 35 transitions, 228 flow [2022-11-25 18:19:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 202 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-25 18:19:56,683 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2022-11-25 18:19:56,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=804, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2022-11-25 18:19:56,684 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2022-11-25 18:19:56,684 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2022-11-25 18:19:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 322.6666666666667) internal successors, (2904), 9 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 18:19:56,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-25 18:19:56,689 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-25 18:19:56,689 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-25 18:19:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 18:19:56,693 INFO L445 BasicCegarLoop]: Path program histogram: [9, 6, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:56,699 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:19:56,700 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:19:56,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:19:56 BasicIcfg [2022-11-25 18:19:56,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:19:56,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:19:56,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:19:56,704 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:19:56,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:18:54" (3/4) ... [2022-11-25 18:19:56,708 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 18:19:56,716 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-25 18:19:56,716 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-25 18:19:56,733 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2022-11-25 18:19:56,734 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 18:19:56,734 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 18:19:56,735 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 18:19:56,801 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:19:56,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:19:56,802 INFO L158 Benchmark]: Toolchain (without parser) took 63301.12ms. Allocated memory was 165.7MB in the beginning and 499.1MB in the end (delta: 333.4MB). Free memory was 120.1MB in the beginning and 427.9MB in the end (delta: -307.8MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,802 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 71.6MB in the beginning and 71.5MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:19:56,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.79ms. Allocated memory is still 165.7MB. Free memory was 120.1MB in the beginning and 128.6MB in the end (delta: -8.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,803 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.16ms. Allocated memory is still 165.7MB. Free memory was 128.6MB in the beginning and 125.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,804 INFO L158 Benchmark]: Boogie Preprocessor took 42.23ms. Allocated memory is still 165.7MB. Free memory was 125.7MB in the beginning and 123.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,804 INFO L158 Benchmark]: RCFGBuilder took 957.24ms. Allocated memory is still 165.7MB. Free memory was 123.6MB in the beginning and 97.2MB in the end (delta: 26.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,804 INFO L158 Benchmark]: TraceAbstraction took 61730.61ms. Allocated memory was 165.7MB in the beginning and 499.1MB in the end (delta: 333.4MB). Free memory was 96.4MB in the beginning and 433.2MB in the end (delta: -336.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:19:56,805 INFO L158 Benchmark]: Witness Printer took 97.67ms. Allocated memory is still 499.1MB. Free memory was 433.2MB in the beginning and 427.9MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:19:56,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 71.6MB in the beginning and 71.5MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.79ms. Allocated memory is still 165.7MB. Free memory was 120.1MB in the beginning and 128.6MB in the end (delta: -8.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.16ms. Allocated memory is still 165.7MB. Free memory was 128.6MB in the beginning and 125.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.23ms. Allocated memory is still 165.7MB. Free memory was 125.7MB in the beginning and 123.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 957.24ms. Allocated memory is still 165.7MB. Free memory was 123.6MB in the beginning and 97.2MB in the end (delta: 26.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 61730.61ms. Allocated memory was 165.7MB in the beginning and 499.1MB in the end (delta: 333.4MB). Free memory was 96.4MB in the beginning and 433.2MB in the end (delta: -336.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 97.67ms. Allocated memory is still 499.1MB. Free memory was 433.2MB in the beginning and 427.9MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.2s, 342 PlacesBefore, 27 PlacesAfterwards, 363 TransitionsBefore, 26 TransitionsAfterwards, 7452 CoEnabledTransitionPairs, 9 FixpointIterations, 210 TrivialSequentialCompositions, 106 ConcurrentSequentialCompositions, 65 TrivialYvCompositions, 27 ConcurrentYvCompositions, 22 ChoiceCompositions, 430 TotalNumberOfCompositions, 7858 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7150, independent: 7045, independent conditional: 0, independent unconditional: 7045, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5332, independent: 5295, independent conditional: 0, independent unconditional: 5295, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5332, independent: 5295, independent conditional: 0, independent unconditional: 5295, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 37, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 104, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7150, independent: 1750, independent conditional: 0, independent unconditional: 1750, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 5332, unknown conditional: 0, unknown unconditional: 5332] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 451 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 61.5s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 21.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 18.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6694 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5144 mSDsluCounter, 7804 SdHoareTripleChecker+Invalid, 13.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7146 mSDsCounter, 144 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14273 IncrementalHoareTripleChecker+Invalid, 14417 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 144 mSolverCounterUnsat, 658 mSDtfsCounter, 14273 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 230 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=727occurred in iteration=11, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 490 NumberOfCodeBlocks, 490 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 7232 SizeOfPredicates, 2 NumberOfNonLiveVariables, 281 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 22 InterpolantComputations, 21 PerfectInterpolantSequences, 71/72 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 18:19:56,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e095e281-a22d-4446-8d8b-99c8a792b734/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE