./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:37:10,753 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:37:10,851 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:37:10,861 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:37:10,862 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:37:10,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:37:10,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:37:10,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:37:10,942 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:37:10,947 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:37:10,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:37:10,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:37:10,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:37:10,950 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:37:10,951 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:37:10,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:37:10,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:37:10,953 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:37:10,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:37:10,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:37:10,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:37:10,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:37:10,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:37:10,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:37:10,956 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:37:10,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:37:10,957 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:37:10,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:37:10,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:37:10,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:37:10,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:37:10,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:10,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:37:10,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:37:10,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:37:10,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:37:10,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:37:10,972 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:37:10,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:37:10,973 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:37:10,973 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:37:10,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:37:10,974 INFO L153 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_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2023-11-23 22:37:11,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:37:11,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:37:11,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:37:11,394 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:37:11,395 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:37:11,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-23 22:37:14,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:37:14,944 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:37:14,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-23 22:37:14,967 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/data/67760ae7f/57dd75568e794d5abcf3acd796166c7a/FLAGe57a62481 [2023-11-23 22:37:14,984 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/data/67760ae7f/57dd75568e794d5abcf3acd796166c7a [2023-11-23 22:37:14,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:37:14,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:37:14,991 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:14,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:37:14,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:37:15,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:14" (1/1) ... [2023-11-23 22:37:15,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286a2622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15, skipping insertion in model container [2023-11-23 22:37:15,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:14" (1/1) ... [2023-11-23 22:37:15,061 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:37:15,632 WARN L240 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_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-23 22:37:15,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:15,692 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:37:15,801 WARN L240 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_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-23 22:37:15,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:15,900 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:37:15,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15 WrapperNode [2023-11-23 22:37:15,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:15,905 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:15,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:37:15,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:37:15,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,961 INFO L138 Inliner]: procedures = 272, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 282 [2023-11-23 22:37:15,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:15,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:37:15,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:37:15,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:37:15,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,980 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,994 INFO L189 HeapSplitter]: Split 24 memory accesses to 4 slices as follows [2, 5, 2, 15] [2023-11-23 22:37:15,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:15,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:37:16,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:37:16,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:37:16,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:37:16,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (1/1) ... [2023-11-23 22:37:16,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:16,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:37:16,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:37:16,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:37:16,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:37:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:37:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:37:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:37:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:37:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:37:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:37:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:37:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:37:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:37:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:37:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:37:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-23 22:37:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-23 22:37:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:37:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:37:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:37:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:37:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:37:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:37:16,167 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:37:16,411 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:37:16,414 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:37:16,839 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:37:17,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:37:17,065 INFO L309 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-23 22:37:17,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:17 BoogieIcfgContainer [2023-11-23 22:37:17,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:37:17,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:37:17,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:37:17,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:37:17,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:37:14" (1/3) ... [2023-11-23 22:37:17,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146f4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:17, skipping insertion in model container [2023-11-23 22:37:17,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:15" (2/3) ... [2023-11-23 22:37:17,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146f4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:17, skipping insertion in model container [2023-11-23 22:37:17,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:17" (3/3) ... [2023-11-23 22:37:17,100 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-11-23 22:37:17,111 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:37:17,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:37:17,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-23 22:37:17,123 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:37:17,196 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 22:37:17,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 134 transitions, 275 flow [2023-11-23 22:37:17,318 INFO L124 PetriNetUnfolderBase]: 65/217 cut-off events. [2023-11-23 22:37:17,318 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:37:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 65/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1017 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2023-11-23 22:37:17,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 134 transitions, 275 flow [2023-11-23 22:37:17,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 132 transitions, 268 flow [2023-11-23 22:37:17,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:17,366 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=LoopHeads, 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;@45e7a215, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:17,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-23 22:37:17,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:37:17,376 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-23 22:37:17,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:37:17,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:17,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 22:37:17,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:37:17,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1450728899, now seen corresponding path program 1 times [2023-11-23 22:37:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253995737] [2023-11-23 22:37:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:17,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253995737] [2023-11-23 22:37:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253995737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:17,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:17,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:17,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330628759] [2023-11-23 22:37:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:17,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:17,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2023-11-23 22:37:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:17,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:17,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2023-11-23 22:37:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:18,491 INFO L124 PetriNetUnfolderBase]: 772/2150 cut-off events. [2023-11-23 22:37:18,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:37:18,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 2150 events. 772/2150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16021 event pairs, 630 based on Foata normal form. 528/2420 useless extension candidates. Maximal degree in co-relation 3478. Up to 1435 conditions per place. [2023-11-23 22:37:18,517 INFO L140 encePairwiseOnDemand]: 98/134 looper letters, 58 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-11-23 22:37:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 324 flow [2023-11-23 22:37:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:37:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:37:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-11-23 22:37:18,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323383084577115 [2023-11-23 22:37:18,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-11-23 22:37:18,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-11-23 22:37:18,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:18,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-11-23 22:37:18,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:18,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:18,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:18,558 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 268 flow. Second operand 3 states and 214 transitions. [2023-11-23 22:37:18,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 324 flow [2023-11-23 22:37:18,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:37:18,571 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 214 flow [2023-11-23 22:37:18,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2023-11-23 22:37:18,589 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 3 predicate places. [2023-11-23 22:37:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 214 flow [2023-11-23 22:37:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:18,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:18,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:37:18,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:37:18,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1081217776, now seen corresponding path program 1 times [2023-11-23 22:37:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:18,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152404844] [2023-11-23 22:37:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152404844] [2023-11-23 22:37:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152404844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176820507] [2023-11-23 22:37:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:18,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:18,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:18,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:37:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:18,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:37:18,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:18,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176820507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:18,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:18,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 22:37:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725362177] [2023-11-23 22:37:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:37:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:37:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:37:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2023-11-23 22:37:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:18,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:18,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2023-11-23 22:37:18,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:19,586 INFO L124 PetriNetUnfolderBase]: 772/2153 cut-off events. [2023-11-23 22:37:19,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:37:19,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 2153 events. 772/2153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16035 event pairs, 630 based on Foata normal form. 0/1895 useless extension candidates. Maximal degree in co-relation 3594. Up to 1435 conditions per place. [2023-11-23 22:37:19,612 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 58 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2023-11-23 22:37:19,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 103 transitions, 352 flow [2023-11-23 22:37:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:37:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:37:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 306 transitions. [2023-11-23 22:37:19,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805970149253731 [2023-11-23 22:37:19,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 306 transitions. [2023-11-23 22:37:19,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 306 transitions. [2023-11-23 22:37:19,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:19,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 306 transitions. [2023-11-23 22:37:19,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:19,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:19,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:19,625 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 214 flow. Second operand 6 states and 306 transitions. [2023-11-23 22:37:19,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 103 transitions, 352 flow [2023-11-23 22:37:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 103 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:19,631 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 246 flow [2023-11-23 22:37:19,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2023-11-23 22:37:19,633 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 10 predicate places. [2023-11-23 22:37:19,633 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 246 flow [2023-11-23 22:37:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:19,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:19,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-23 22:37:19,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:19,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:37:19,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -506281725, now seen corresponding path program 2 times [2023-11-23 22:37:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593923293] [2023-11-23 22:37:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593923293] [2023-11-23 22:37:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593923293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:20,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466637143] [2023-11-23 22:37:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:37:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:20,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:37:20,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:37:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:20,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:20,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:20,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:37:20,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466637143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:20,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:20,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 22:37:20,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935443971] [2023-11-23 22:37:20,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:37:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:37:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:37:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2023-11-23 22:37:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 246 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:20,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:20,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2023-11-23 22:37:20,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:20,719 INFO L124 PetriNetUnfolderBase]: 772/2159 cut-off events. [2023-11-23 22:37:20,720 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-23 22:37:20,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3643 conditions, 2159 events. 772/2159 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16029 event pairs, 630 based on Foata normal form. 6/1908 useless extension candidates. Maximal degree in co-relation 3585. Up to 1435 conditions per place. [2023-11-23 22:37:20,740 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 58 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2023-11-23 22:37:20,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 420 flow [2023-11-23 22:37:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:37:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:37:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 555 transitions. [2023-11-23 22:37:20,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451492537313433 [2023-11-23 22:37:20,747 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 555 transitions. [2023-11-23 22:37:20,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 555 transitions. [2023-11-23 22:37:20,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:20,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 555 transitions. [2023-11-23 22:37:20,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 46.25) internal successors, (555), 12 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:20,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:20,757 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 134.0) internal successors, (1742), 13 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:20,758 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 246 flow. Second operand 12 states and 555 transitions. [2023-11-23 22:37:20,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 420 flow [2023-11-23 22:37:20,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 109 transitions, 406 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:20,767 INFO L231 Difference]: Finished difference. Result has 122 places, 109 transitions, 316 flow [2023-11-23 22:37:20,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=316, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2023-11-23 22:37:20,770 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 26 predicate places. [2023-11-23 22:37:20,770 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 316 flow [2023-11-23 22:37:20,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:20,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:20,772 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-23 22:37:20,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:21,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:21,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:37:21,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash 374376931, now seen corresponding path program 3 times [2023-11-23 22:37:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507238574] [2023-11-23 22:37:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:37:21,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:37:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:37:21,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:37:21,088 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:37:21,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-23 22:37:21,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-23 22:37:21,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-23 22:37:21,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-23 22:37:21,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-23 22:37:21,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:37:21,094 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-23 22:37:21,097 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:37:21,098 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 22:37:21,144 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:37:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 179 transitions, 374 flow [2023-11-23 22:37:21,193 INFO L124 PetriNetUnfolderBase]: 105/352 cut-off events. [2023-11-23 22:37:21,193 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:37:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 352 events. 105/352 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1885 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 219. Up to 12 conditions per place. [2023-11-23 22:37:21,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 179 transitions, 374 flow [2023-11-23 22:37:21,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 179 transitions, 374 flow [2023-11-23 22:37:21,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:21,206 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=LoopHeads, 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;@45e7a215, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:21,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-23 22:37:21,216 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:37:21,216 INFO L124 PetriNetUnfolderBase]: 14/79 cut-off events. [2023-11-23 22:37:21,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:37:21,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:21,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-23 22:37:21,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-23 22:37:21,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash -633979805, now seen corresponding path program 1 times [2023-11-23 22:37:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:21,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063544880] [2023-11-23 22:37:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063544880] [2023-11-23 22:37:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063544880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:21,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:21,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758058447] [2023-11-23 22:37:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:21,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2023-11-23 22:37:21,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:21,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:21,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2023-11-23 22:37:21,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:28,772 INFO L124 PetriNetUnfolderBase]: 29293/57078 cut-off events. [2023-11-23 22:37:28,773 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-23 22:37:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99046 conditions, 57078 events. 29293/57078 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 578771 event pairs, 25003 based on Foata normal form. 15018/65101 useless extension candidates. Maximal degree in co-relation 80566. Up to 41865 conditions per place. [2023-11-23 22:37:29,186 INFO L140 encePairwiseOnDemand]: 132/179 looper letters, 81 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2023-11-23 22:37:29,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 454 flow [2023-11-23 22:37:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:37:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:37:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-11-23 22:37:29,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344506517690876 [2023-11-23 22:37:29,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-11-23 22:37:29,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-11-23 22:37:29,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:29,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-11-23 22:37:29,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:29,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:29,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:29,195 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 374 flow. Second operand 3 states and 287 transitions. [2023-11-23 22:37:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 454 flow [2023-11-23 22:37:29,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:37:29,204 INFO L231 Difference]: Finished difference. Result has 133 places, 136 transitions, 298 flow [2023-11-23 22:37:29,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=133, PETRI_TRANSITIONS=136} [2023-11-23 22:37:29,207 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 3 predicate places. [2023-11-23 22:37:29,207 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 136 transitions, 298 flow [2023-11-23 22:37:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:29,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:29,208 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:29,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:37:29,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-23 22:37:29,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash -270411511, now seen corresponding path program 1 times [2023-11-23 22:37:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064105995] [2023-11-23 22:37:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064105995] [2023-11-23 22:37:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064105995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123884401] [2023-11-23 22:37:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:29,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:29,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:37:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:29,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:37:29,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:29,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:29,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123884401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:29,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 22:37:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968255614] [2023-11-23 22:37:29,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:37:29,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:37:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:37:29,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2023-11-23 22:37:29,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 136 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:29,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:29,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2023-11-23 22:37:29,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:35,253 INFO L124 PetriNetUnfolderBase]: 29293/57081 cut-off events. [2023-11-23 22:37:35,253 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-23 22:37:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99062 conditions, 57081 events. 29293/57081 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 578823 event pairs, 25003 based on Foata normal form. 0/50086 useless extension candidates. Maximal degree in co-relation 99049. Up to 41865 conditions per place. [2023-11-23 22:37:35,722 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 81 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-11-23 22:37:35,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 139 transitions, 482 flow [2023-11-23 22:37:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:37:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:37:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2023-11-23 22:37:35,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789571694599628 [2023-11-23 22:37:35,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2023-11-23 22:37:35,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2023-11-23 22:37:35,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:35,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2023-11-23 22:37:35,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:35,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:35,731 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:35,732 INFO L175 Difference]: Start difference. First operand has 133 places, 136 transitions, 298 flow. Second operand 6 states and 407 transitions. [2023-11-23 22:37:35,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 139 transitions, 482 flow [2023-11-23 22:37:35,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:35,738 INFO L231 Difference]: Finished difference. Result has 140 places, 139 transitions, 330 flow [2023-11-23 22:37:35,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2023-11-23 22:37:35,743 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 10 predicate places. [2023-11-23 22:37:35,743 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 330 flow [2023-11-23 22:37:35,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:35,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:35,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2023-11-23 22:37:35,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:37:35,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-23 22:37:35,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1232390685, now seen corresponding path program 2 times [2023-11-23 22:37:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753075943] [2023-11-23 22:37:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753075943] [2023-11-23 22:37:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753075943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007386899] [2023-11-23 22:37:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:37:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:36,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:36,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:37:36,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:37:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:36,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:36,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:36,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:37:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007386899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:36,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 22:37:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597799454] [2023-11-23 22:37:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:36,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:37:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:37:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:37:36,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2023-11-23 22:37:36,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 330 flow. Second operand has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:36,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:36,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2023-11-23 22:37:36,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:41,749 INFO L124 PetriNetUnfolderBase]: 29293/57087 cut-off events. [2023-11-23 22:37:41,749 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-11-23 22:37:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99099 conditions, 57087 events. 29293/57087 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 579109 event pairs, 25003 based on Foata normal form. 6/50099 useless extension candidates. Maximal degree in co-relation 99040. Up to 41865 conditions per place. [2023-11-23 22:37:42,059 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 81 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2023-11-23 22:37:42,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 145 transitions, 550 flow [2023-11-23 22:37:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:37:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:37:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 734 transitions. [2023-11-23 22:37:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34171322160148976 [2023-11-23 22:37:42,066 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 734 transitions. [2023-11-23 22:37:42,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 734 transitions. [2023-11-23 22:37:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 734 transitions. [2023-11-23 22:37:42,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.166666666666664) internal successors, (734), 12 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:42,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 179.0) internal successors, (2327), 13 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:42,083 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 179.0) internal successors, (2327), 13 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:42,084 INFO L175 Difference]: Start difference. First operand has 140 places, 139 transitions, 330 flow. Second operand 12 states and 734 transitions. [2023-11-23 22:37:42,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 145 transitions, 550 flow [2023-11-23 22:37:42,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 145 transitions, 536 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:42,098 INFO L231 Difference]: Finished difference. Result has 156 places, 145 transitions, 400 flow [2023-11-23 22:37:42,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=400, PETRI_PLACES=156, PETRI_TRANSITIONS=145} [2023-11-23 22:37:42,100 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 26 predicate places. [2023-11-23 22:37:42,101 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 145 transitions, 400 flow [2023-11-23 22:37:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:42,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:42,102 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2023-11-23 22:37:42,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:42,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b2d0be-dcf5-4b17-b3ab-9bce750b9ada/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:37:42,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-23 22:37:42,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1522156579, now seen corresponding path program 3 times [2023-11-23 22:37:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141035070] [2023-11-23 22:37:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:42,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:37:42,362 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:37:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:37:42,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:37:42,399 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:37:42,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-23 22:37:42,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-23 22:37:42,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-23 22:37:42,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-23 22:37:42,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-23 22:37:42,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-23 22:37:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:37:42,402 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-23 22:37:42,402 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:37:42,402 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-23 22:37:42,454 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:37:42,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 224 transitions, 475 flow [2023-11-23 22:37:42,731 INFO L124 PetriNetUnfolderBase]: 148/498 cut-off events. [2023-11-23 22:37:42,731 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-23 22:37:42,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 498 events. 148/498 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2885 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2023-11-23 22:37:42,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 224 transitions, 475 flow [2023-11-23 22:37:42,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 224 transitions, 475 flow [2023-11-23 22:37:42,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:42,749 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=LoopHeads, 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;@45e7a215, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:42,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-23 22:37:42,761 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:37:42,761 INFO L124 PetriNetUnfolderBase]: 16/96 cut-off events. [2023-11-23 22:37:42,761 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-23 22:37:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:42,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:37:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1454750254, now seen corresponding path program 1 times [2023-11-23 22:37:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706182024] [2023-11-23 22:37:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:42,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706182024] [2023-11-23 22:37:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706182024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:42,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678244837] [2023-11-23 22:37:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:42,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 224 [2023-11-23 22:37:42,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 224 transitions, 475 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:42,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:42,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 224 [2023-11-23 22:37:42,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand