./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU --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 ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:33,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:33,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:11:33,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:33,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:33,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:33,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:33,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:33,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:33,976 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:33,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:33,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:33,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:33,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:33,982 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:33,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:33,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:11:33,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:33,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:33,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:33,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:33,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:11:33,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:33,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:11:33,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:33,989 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:33,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:11:33,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:33,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:33,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:33,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:33,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:33,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:33,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:33,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:33,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:11:33,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:33,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:33,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:33,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:33,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:33,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:33,997 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_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec355916cf6ee76d4008e84bb2b3ecc632256e3b320d2f47b453f4ca1f46acbc [2024-10-31 22:11:34,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:34,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:34,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:34,340 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:34,341 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:34,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i Unable to find full path for "g++" [2024-10-31 22:11:36,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:36,638 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:36,638 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2024-10-31 22:11:36,652 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/data/37c655d11/e170c41c9c584367bb63bf6444081e89/FLAGaa2e9eb7b [2024-10-31 22:11:36,930 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/data/37c655d11/e170c41c9c584367bb63bf6444081e89 [2024-10-31 22:11:36,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:36,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:36,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:36,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:36,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:36,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:36" (1/1) ... [2024-10-31 22:11:36,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62581e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:36, skipping insertion in model container [2024-10-31 22:11:36,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:36" (1/1) ... [2024-10-31 22:11:37,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:37,500 WARN L251 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_9e8f8d00-6c01-445b-9a56-330ae7d9deed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30863,30876] [2024-10-31 22:11:37,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:37,540 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:37,591 WARN L251 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_9e8f8d00-6c01-445b-9a56-330ae7d9deed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30863,30876] [2024-10-31 22:11:37,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:37,659 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:37,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37 WrapperNode [2024-10-31 22:11:37,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:37,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:37,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:37,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:37,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,728 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-10-31 22:11:37,730 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:37,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:37,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:37,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:37,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,748 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,777 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-31 22:11:37,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:37,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:37,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:37,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:37,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:37,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:37,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:11:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:11:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-31 22:11:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-31 22:11:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:11:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:11:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:11:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:11:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:11:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:11:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:37,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:37,884 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:11:38,025 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:38,028 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:38,273 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:11:38,277 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:38,558 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:38,558 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:11:38,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38 BoogieIcfgContainer [2024-10-31 22:11:38,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:38,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:38,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:38,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:38,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:36" (1/3) ... [2024-10-31 22:11:38,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (2/3) ... [2024-10-31 22:11:38,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38" (3/3) ... [2024-10-31 22:11:38,570 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2024-10-31 22:11:38,586 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:38,586 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:11:38,586 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:11:38,633 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:11:38,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 25 transitions, 54 flow [2024-10-31 22:11:38,703 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-10-31 22:11:38,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:38,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-31 22:11:38,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 25 transitions, 54 flow [2024-10-31 22:11:38,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 25 transitions, 54 flow [2024-10-31 22:11:38,730 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:38,738 INFO L333 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, 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;@69ac01d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:38,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:11:38,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:38,748 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-10-31 22:11:38,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:38,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:38,751 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:11:38,751 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:38,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1213145637, now seen corresponding path program 1 times [2024-10-31 22:11:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460654311] [2024-10-31 22:11:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:39,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460654311] [2024-10-31 22:11:39,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460654311] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:39,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:39,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108071709] [2024-10-31 22:11:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:39,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:39,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-31 22:11:39,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:39,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-31 22:11:39,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:39,225 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2024-10-31 22:11:39,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:39,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 76 events. 25/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 118. Up to 56 conditions per place. [2024-10-31 22:11:39,228 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-10-31 22:11:39,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 86 flow [2024-10-31 22:11:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-31 22:11:39,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-10-31 22:11:39,244 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 54 flow. Second operand 3 states and 41 transitions. [2024-10-31 22:11:39,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 86 flow [2024-10-31 22:11:39,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:11:39,251 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 62 flow [2024-10-31 22:11:39,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-10-31 22:11:39,261 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-10-31 22:11:39,262 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 62 flow [2024-10-31 22:11:39,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:39,263 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:39,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:39,264 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:39,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2135016630, now seen corresponding path program 1 times [2024-10-31 22:11:39,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662564852] [2024-10-31 22:11:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:39,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662564852] [2024-10-31 22:11:39,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662564852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:39,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292443288] [2024-10-31 22:11:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:39,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:39,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:39,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:11:39,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:39,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292443288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:39,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:11:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051628881] [2024-10-31 22:11:39,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:11:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:11:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:39,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-31 22:11:39,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:39,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-31 22:11:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:39,735 INFO L124 PetriNetUnfolderBase]: 25/79 cut-off events. [2024-10-31 22:11:39,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:39,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 79 events. 25/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 141. Up to 56 conditions per place. [2024-10-31 22:11:39,737 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-10-31 22:11:39,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2024-10-31 22:11:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-10-31 22:11:39,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-31 22:11:39,740 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 62 flow. Second operand 6 states and 65 transitions. [2024-10-31 22:11:39,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2024-10-31 22:11:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:39,742 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-10-31 22:11:39,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-10-31 22:11:39,743 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-10-31 22:11:39,744 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-10-31 22:11:39,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:39,744 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-31 22:11:39,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:11:39,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:39,947 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:39,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1054097819, now seen corresponding path program 2 times [2024-10-31 22:11:39,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009970780] [2024-10-31 22:11:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009970780] [2024-10-31 22:11:40,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009970780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089936683] [2024-10-31 22:11:40,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:40,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:40,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:40,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:40,286 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:11:40,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:40,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:11:40,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:40,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089936683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:40,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-31 22:11:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383390574] [2024-10-31 22:11:40,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:11:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:11:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:11:40,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-31 22:11:40,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:40,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-31 22:11:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:40,435 INFO L124 PetriNetUnfolderBase]: 25/81 cut-off events. [2024-10-31 22:11:40,435 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:11:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 81 events. 25/81 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 132. Up to 56 conditions per place. [2024-10-31 22:11:40,436 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-10-31 22:11:40,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2024-10-31 22:11:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:11:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:11:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-10-31 22:11:40,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-31 22:11:40,439 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 8 states and 80 transitions. [2024-10-31 22:11:40,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2024-10-31 22:11:40,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:40,441 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 116 flow [2024-10-31 22:11:40,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-10-31 22:11:40,442 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-31 22:11:40,442 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 116 flow [2024-10-31 22:11:40,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:40,443 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:40,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:40,649 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:40,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash -624295803, now seen corresponding path program 3 times [2024-10-31 22:11:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420017617] [2024-10-31 22:11:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:11:40,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:11:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:11:40,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:11:40,805 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:11:40,807 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-31 22:11:40,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-31 22:11:40,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-31 22:11:40,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:40,810 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-31 22:11:40,813 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:11:40,813 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:11:40,850 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:11:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 96 flow [2024-10-31 22:11:40,869 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-10-31 22:11:40,870 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:11:40,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 7/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-10-31 22:11:40,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 96 flow [2024-10-31 22:11:40,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 96 flow [2024-10-31 22:11:40,874 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:40,877 INFO L333 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, 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;@69ac01d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:40,877 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-31 22:11:40,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:40,888 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 22:11:40,889 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:11:40,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:40,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,890 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-31 22:11:40,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1675961929, now seen corresponding path program 1 times [2024-10-31 22:11:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670367302] [2024-10-31 22:11:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:40,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670367302] [2024-10-31 22:11:40,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670367302] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:40,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:40,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341623028] [2024-10-31 22:11:40,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:40,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:40,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-31 22:11:40,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-31 22:11:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:41,265 INFO L124 PetriNetUnfolderBase]: 553/1101 cut-off events. [2024-10-31 22:11:41,266 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-31 22:11:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1101 events. 553/1101 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5509 event pairs, 468 based on Foata normal form. 92/1075 useless extension candidates. Maximal degree in co-relation 1219. Up to 866 conditions per place. [2024-10-31 22:11:41,282 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-31 22:11:41,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 148 flow [2024-10-31 22:11:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-10-31 22:11:41,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-10-31 22:11:41,286 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 96 flow. Second operand 3 states and 71 transitions. [2024-10-31 22:11:41,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 148 flow [2024-10-31 22:11:41,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:11:41,289 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 102 flow [2024-10-31 22:11:41,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-10-31 22:11:41,294 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-10-31 22:11:41,294 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 102 flow [2024-10-31 22:11:41,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:41,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:41,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:11:41,295 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-31 22:11:41,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash -221938941, now seen corresponding path program 1 times [2024-10-31 22:11:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:41,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537312996] [2024-10-31 22:11:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537312996] [2024-10-31 22:11:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537312996] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497262275] [2024-10-31 22:11:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:41,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:41,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:11:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:11:41,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497262275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:41,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:11:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833246653] [2024-10-31 22:11:41,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:41,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:11:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:11:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:41,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-31 22:11:41,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:41,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-31 22:11:41,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:41,740 INFO L124 PetriNetUnfolderBase]: 553/1104 cut-off events. [2024-10-31 22:11:41,740 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-31 22:11:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 1104 events. 553/1104 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5520 event pairs, 468 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 2006. Up to 866 conditions per place. [2024-10-31 22:11:41,749 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 26 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-31 22:11:41,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 176 flow [2024-10-31 22:11:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-10-31 22:11:41,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-10-31 22:11:41,751 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 102 flow. Second operand 6 states and 112 transitions. [2024-10-31 22:11:41,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 176 flow [2024-10-31 22:11:41,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:41,754 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 134 flow [2024-10-31 22:11:41,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-31 22:11:41,755 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-10-31 22:11:41,755 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 134 flow [2024-10-31 22:11:41,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:41,756 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:41,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:11:41,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,961 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-31 22:11:41,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1135707337, now seen corresponding path program 2 times [2024-10-31 22:11:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409139972] [2024-10-31 22:11:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:42,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409139972] [2024-10-31 22:11:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409139972] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788693120] [2024-10-31 22:11:42,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:42,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:42,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:42,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:11:42,200 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:11:42,200 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:42,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 22:11:42,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:11:42,226 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788693120] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:42,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-31 22:11:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552813143] [2024-10-31 22:11:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:42,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:42,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-10-31 22:11:42,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:42,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-10-31 22:11:42,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:42,571 INFO L124 PetriNetUnfolderBase]: 951/1882 cut-off events. [2024-10-31 22:11:42,572 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-31 22:11:42,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1882 events. 951/1882 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10896 event pairs, 418 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 3431. Up to 784 conditions per place. [2024-10-31 22:11:42,587 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-10-31 22:11:42,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 283 flow [2024-10-31 22:11:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-31 22:11:42,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-10-31 22:11:42,591 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 134 flow. Second operand 3 states and 85 transitions. [2024-10-31 22:11:42,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 283 flow [2024-10-31 22:11:42,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 269 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:42,594 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 134 flow [2024-10-31 22:11:42,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-10-31 22:11:42,599 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-10-31 22:11:42,599 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 134 flow [2024-10-31 22:11:42,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:42,599 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-31 22:11:42,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:11:42,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:42,800 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-31 22:11:42,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -478068286, now seen corresponding path program 1 times [2024-10-31 22:11:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445015201] [2024-10-31 22:11:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:11:42,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445015201] [2024-10-31 22:11:42,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445015201] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:42,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886185948] [2024-10-31 22:11:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:42,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:42,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:42,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:11:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:43,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:11:43,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:11:43,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:11:43,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886185948] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:43,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:43,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-31 22:11:43,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710306770] [2024-10-31 22:11:43,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:43,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:11:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:11:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:11:43,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-31 22:11:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:43,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-31 22:11:43,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:43,490 INFO L124 PetriNetUnfolderBase]: 966/1930 cut-off events. [2024-10-31 22:11:43,490 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-10-31 22:11:43,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 1930 events. 966/1930 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11245 event pairs, 818 based on Foata normal form. 2/1782 useless extension candidates. Maximal degree in co-relation 3675. Up to 1501 conditions per place. [2024-10-31 22:11:43,508 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 28 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-31 22:11:43,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 216 flow [2024-10-31 22:11:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:11:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:11:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-10-31 22:11:43,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-10-31 22:11:43,511 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 134 flow. Second operand 8 states and 139 transitions. [2024-10-31 22:11:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 216 flow [2024-10-31 22:11:43,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:43,517 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 166 flow [2024-10-31 22:11:43,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-10-31 22:11:43,518 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-10-31 22:11:43,519 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 166 flow [2024-10-31 22:11:43,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:43,520 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-31 22:11:43,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:11:43,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:11:43,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-31 22:11:43,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 378366210, now seen corresponding path program 2 times [2024-10-31 22:11:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:43,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676099248] [2024-10-31 22:11:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:11:43,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:11:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:11:43,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:11:43,776 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:11:43,776 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-31 22:11:43,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-31 22:11:43,777 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-31 22:11:43,777 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-31 22:11:43,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:11:43,777 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-31 22:11:43,778 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:11:43,778 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-31 22:11:43,818 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:11:43,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 140 flow [2024-10-31 22:11:43,837 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-10-31 22:11:43,837 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:11:43,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 10/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-10-31 22:11:43,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 140 flow [2024-10-31 22:11:43,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 140 flow [2024-10-31 22:11:43,840 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:43,841 INFO L333 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, 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;@69ac01d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:43,841 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-31 22:11:43,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:43,846 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 22:11:43,846 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:11:43,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:43,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:43,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:11:43,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 736650330, now seen corresponding path program 1 times [2024-10-31 22:11:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41817608] [2024-10-31 22:11:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41817608] [2024-10-31 22:11:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41817608] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:43,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:43,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036888613] [2024-10-31 22:11:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:43,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:43,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-31 22:11:43,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:43,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-31 22:11:43,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:45,533 INFO L124 PetriNetUnfolderBase]: 8815/14150 cut-off events. [2024-10-31 22:11:45,533 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-10-31 22:11:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 14150 events. 8815/14150 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 92922 event pairs, 7668 based on Foata normal form. 1558/14142 useless extension candidates. Maximal degree in co-relation 2699. Up to 11966 conditions per place. [2024-10-31 22:11:45,640 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-10-31 22:11:45,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 212 flow [2024-10-31 22:11:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-31 22:11:45,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2024-10-31 22:11:45,642 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 140 flow. Second operand 3 states and 101 transitions. [2024-10-31 22:11:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 212 flow [2024-10-31 22:11:45,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-31 22:11:45,647 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-10-31 22:11:45,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-10-31 22:11:45,649 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-10-31 22:11:45,649 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-10-31 22:11:45,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:45,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:45,651 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:45,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:11:45,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:11:45,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 253176913, now seen corresponding path program 1 times [2024-10-31 22:11:45,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:45,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77137026] [2024-10-31 22:11:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:45,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:45,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77137026] [2024-10-31 22:11:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77137026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190415701] [2024-10-31 22:11:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:45,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:45,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:45,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:45,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:11:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:45,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:11:45,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:45,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190415701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:45,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:45,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:11:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950782729] [2024-10-31 22:11:45,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:45,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:11:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:45,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:11:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:45,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-31 22:11:45,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:45,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:45,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-31 22:11:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:47,897 INFO L124 PetriNetUnfolderBase]: 8815/14153 cut-off events. [2024-10-31 22:11:47,897 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-10-31 22:11:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 14153 events. 8815/14153 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 93027 event pairs, 7668 based on Foata normal form. 0/12587 useless extension candidates. Maximal degree in co-relation 26455. Up to 11966 conditions per place. [2024-10-31 22:11:48,004 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-10-31 22:11:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 238 flow [2024-10-31 22:11:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-10-31 22:11:48,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2024-10-31 22:11:48,006 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 6 states and 159 transitions. [2024-10-31 22:11:48,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 238 flow [2024-10-31 22:11:48,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:48,008 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 174 flow [2024-10-31 22:11:48,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-10-31 22:11:48,010 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-10-31 22:11:48,012 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 174 flow [2024-10-31 22:11:48,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:48,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:48,013 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:48,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:48,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:11:48,214 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:11:48,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -447337958, now seen corresponding path program 2 times [2024-10-31 22:11:48,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:48,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942032238] [2024-10-31 22:11:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:11:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942032238] [2024-10-31 22:11:48,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942032238] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:48,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:48,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529755172] [2024-10-31 22:11:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:48,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:48,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:48,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:48,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:48,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-31 22:11:48,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:48,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:48,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-31 22:11:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:51,095 INFO L124 PetriNetUnfolderBase]: 15165/24285 cut-off events. [2024-10-31 22:11:51,095 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2024-10-31 22:11:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 24285 events. 15165/24285 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 175318 event pairs, 6868 based on Foata normal form. 0/21619 useless extension candidates. Maximal degree in co-relation 45514. Up to 10774 conditions per place. [2024-10-31 22:11:51,290 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 72 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-10-31 22:11:51,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 394 flow [2024-10-31 22:11:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-31 22:11:51,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2024-10-31 22:11:51,292 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 174 flow. Second operand 3 states and 125 transitions. [2024-10-31 22:11:51,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 394 flow [2024-10-31 22:11:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:51,301 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 174 flow [2024-10-31 22:11:51,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-10-31 22:11:51,302 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-31 22:11:51,302 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 174 flow [2024-10-31 22:11:51,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:51,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:51,304 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:51,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:11:51,305 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:11:51,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 615573716, now seen corresponding path program 1 times [2024-10-31 22:11:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530424105] [2024-10-31 22:11:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:11:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530424105] [2024-10-31 22:11:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530424105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649895876] [2024-10-31 22:11:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:51,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:51,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-31 22:11:51,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:51,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:51,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-31 22:11:51,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:55,153 INFO L124 PetriNetUnfolderBase]: 26272/41960 cut-off events. [2024-10-31 22:11:55,153 INFO L125 PetriNetUnfolderBase]: For 5525/5525 co-relation queries the response was YES. [2024-10-31 22:11:55,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 41960 events. 26272/41960 cut-off events. For 5525/5525 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 326172 event pairs, 11890 based on Foata normal form. 0/38398 useless extension candidates. Maximal degree in co-relation 81883. Up to 18619 conditions per place. [2024-10-31 22:11:55,465 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-10-31 22:11:55,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 409 flow [2024-10-31 22:11:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-31 22:11:55,466 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-10-31 22:11:55,466 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 174 flow. Second operand 3 states and 124 transitions. [2024-10-31 22:11:55,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 409 flow [2024-10-31 22:11:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:55,504 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 184 flow [2024-10-31 22:11:55,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-10-31 22:11:55,505 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-10-31 22:11:55,505 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 184 flow [2024-10-31 22:11:55,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:55,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:55,505 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:55,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:11:55,506 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:11:55,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1682315564, now seen corresponding path program 1 times [2024-10-31 22:11:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129805614] [2024-10-31 22:11:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:55,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:55,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129805614] [2024-10-31 22:11:55,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129805614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:55,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821870584] [2024-10-31 22:11:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:55,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:55,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:55,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:11:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:55,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:11:55,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:55,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:11:55,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821870584] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:55,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:55,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-31 22:11:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450578810] [2024-10-31 22:11:55,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:55,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:11:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:11:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:11:55,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-31 22:11:55,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:55,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:55,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-31 22:11:55,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:59,743 INFO L124 PetriNetUnfolderBase]: 26512/42563 cut-off events. [2024-10-31 22:11:59,743 INFO L125 PetriNetUnfolderBase]: For 6954/6954 co-relation queries the response was YES. [2024-10-31 22:11:59,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84762 conditions, 42563 events. 26512/42563 cut-off events. For 6954/6954 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 332214 event pairs, 22914 based on Foata normal form. 2/39877 useless extension candidates. Maximal degree in co-relation 84722. Up to 35624 conditions per place. [2024-10-31 22:12:00,040 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-10-31 22:12:00,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 292 flow [2024-10-31 22:12:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:12:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:12:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-10-31 22:12:00,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057377049180328 [2024-10-31 22:12:00,043 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 184 flow. Second operand 8 states and 198 transitions. [2024-10-31 22:12:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 292 flow [2024-10-31 22:12:00,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:12:00,102 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 216 flow [2024-10-31 22:12:00,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-10-31 22:12:00,105 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-10-31 22:12:00,105 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 216 flow [2024-10-31 22:12:00,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:00,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:00,106 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:00,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:12:00,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e8f8d00-6c01-445b-9a56-330ae7d9deed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:12:00,307 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-31 22:12:00,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1343367604, now seen corresponding path program 2 times [2024-10-31 22:12:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:00,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544543397] [2024-10-31 22:12:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:12:00,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:12:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:12:00,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:12:00,368 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:12:00,368 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-31 22:12:00,369 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-31 22:12:00,369 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-31 22:12:00,369 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-31 22:12:00,369 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-31 22:12:00,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:12:00,369 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-31 22:12:00,370 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:12:00,370 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-31 22:12:00,421 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:12:00,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 186 flow [2024-10-31 22:12:00,436 INFO L124 PetriNetUnfolderBase]: 13/90 cut-off events. [2024-10-31 22:12:00,437 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:12:00,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 13/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-10-31 22:12:00,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 186 flow [2024-10-31 22:12:00,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 186 flow [2024-10-31 22:12:00,440 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:12:00,441 INFO L333 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, 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;@69ac01d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:12:00,441 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-31 22:12:00,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:12:00,445 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 22:12:00,445 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:12:00,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:00,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:00,447 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-31 22:12:00,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 431376299, now seen corresponding path program 1 times [2024-10-31 22:12:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2163080] [2024-10-31 22:12:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:00,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2163080] [2024-10-31 22:12:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2163080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:12:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152947783] [2024-10-31 22:12:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:00,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:12:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:12:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:12:00,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-10-31 22:12:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-10-31 22:12:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand