./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:11,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:11,890 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:11,896 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:11,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:11,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:11,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:11,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:11,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:11,925 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:11,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:11,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:11,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:11,927 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:11,928 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:11,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:11,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:11,930 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:11,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:11,931 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:11,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:11,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:11,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:11,934 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:11,934 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:11,935 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:11,935 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:11,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:11,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:11,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:11,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:11,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:11,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:11,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:11,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:11,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:11,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:11,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:11,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:11,941 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:11,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:11,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:11,942 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_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2023-11-26 11:48:12,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:12,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:12,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:12,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:12,256 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:12,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-26 11:48:15,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:15,686 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:15,687 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-26 11:48:15,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/data/8e8c156b9/306a5e880ebd4a29b8a4c4a33d4af1de/FLAG54b2dbbce [2023-11-26 11:48:15,742 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/data/8e8c156b9/306a5e880ebd4a29b8a4c4a33d4af1de [2023-11-26 11:48:15,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:15,746 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:15,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:15,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:15,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:15,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:15" (1/1) ... [2023-11-26 11:48:15,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15357160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:15, skipping insertion in model container [2023-11-26 11:48:15,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:15" (1/1) ... [2023-11-26 11:48:15,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:16,520 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2023-11-26 11:48:16,529 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2023-11-26 11:48:16,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:16,559 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:16,642 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2023-11-26 11:48:16,644 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2023-11-26 11:48:16,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:16,747 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:16,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16 WrapperNode [2023-11-26 11:48:16,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:16,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:16,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:16,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:16,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,852 INFO L138 Inliner]: procedures = 275, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-11-26 11:48:16,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:16,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:16,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:16,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:16,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,883 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,912 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 2, 5, 3, 24, 2]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0, 0]. The 15 writes are split as follows [0, 1, 0, 2, 11, 1]. [2023-11-26 11:48:16,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,913 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:16,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:16,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:16,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:16,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (1/1) ... [2023-11-26 11:48:16,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:16,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:16,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:17,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:48:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:48:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:48:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:48:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:48:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:48:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:48:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:48:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:48:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:48:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:48:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:48:17,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:48:17,082 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:48:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:48:17,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:48:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:48:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:48:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:48:17,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:17,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:17,091 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:48:17,270 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:17,272 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:17,621 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:18,017 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:18,017 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:48:18,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:18 BoogieIcfgContainer [2023-11-26 11:48:18,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:18,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:18,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:18,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:18,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:15" (1/3) ... [2023-11-26 11:48:18,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da5fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:18, skipping insertion in model container [2023-11-26 11:48:18,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:16" (2/3) ... [2023-11-26 11:48:18,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da5fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:18, skipping insertion in model container [2023-11-26 11:48:18,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:18" (3/3) ... [2023-11-26 11:48:18,031 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2023-11-26 11:48:18,041 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:48:18,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:18,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 11:48:18,052 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:48:18,130 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:48:18,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2023-11-26 11:48:18,214 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2023-11-26 11:48:18,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:48:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-26 11:48:18,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2023-11-26 11:48:18,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2023-11-26 11:48:18,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:18,259 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4dac87d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:18,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-26 11:48:18,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:48:18,263 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:48:18,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:48:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:18,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:48:18,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:18,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash 545855, now seen corresponding path program 1 times [2023-11-26 11:48:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851910379] [2023-11-26 11:48:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:18,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851910379] [2023-11-26 11:48:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851910379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:18,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307098213] [2023-11-26 11:48:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:48:18,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:48:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:18,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:18,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:18,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:18,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:18,837 INFO L124 PetriNetUnfolderBase]: 303/522 cut-off events. [2023-11-26 11:48:18,838 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-26 11:48:18,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 522 events. 303/522 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2051 event pairs, 209 based on Foata normal form. 16/458 useless extension candidates. Maximal degree in co-relation 914. Up to 485 conditions per place. [2023-11-26 11:48:18,848 INFO L140 encePairwiseOnDemand]: 39/41 looper letters, 26 selfloop transitions, 0 changer transitions 2/33 dead transitions. [2023-11-26 11:48:18,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 131 flow [2023-11-26 11:48:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:48:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 11:48:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2023-11-26 11:48:18,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2023-11-26 11:48:18,868 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 46 transitions. [2023-11-26 11:48:18,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 46 transitions. [2023-11-26 11:48:18,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:18,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 46 transitions. [2023-11-26 11:48:18,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:18,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:18,879 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:18,881 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 83 flow. Second operand 2 states and 46 transitions. [2023-11-26 11:48:18,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 131 flow [2023-11-26 11:48:18,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:48:18,888 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 66 flow [2023-11-26 11:48:18,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-26 11:48:18,895 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-11-26 11:48:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 66 flow [2023-11-26 11:48:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:18,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:48:18,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:18,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash -684618514, now seen corresponding path program 1 times [2023-11-26 11:48:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:18,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374352996] [2023-11-26 11:48:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:19,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374352996] [2023-11-26 11:48:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374352996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:19,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:19,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:19,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509421453] [2023-11-26 11:48:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:19,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:19,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:19,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:19,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:19,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:19,517 INFO L124 PetriNetUnfolderBase]: 159/324 cut-off events. [2023-11-26 11:48:19,517 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 11:48:19,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 324 events. 159/324 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1158 event pairs, 83 based on Foata normal form. 14/302 useless extension candidates. Maximal degree in co-relation 635. Up to 163 conditions per place. [2023-11-26 11:48:19,530 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 28 selfloop transitions, 2 changer transitions 5/40 dead transitions. [2023-11-26 11:48:19,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 157 flow [2023-11-26 11:48:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:48:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-26 11:48:19,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2023-11-26 11:48:19,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-26 11:48:19,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-26 11:48:19,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:19,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-26 11:48:19,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 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) [2023-11-26 11:48:19,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,542 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 66 flow. Second operand 3 states and 60 transitions. [2023-11-26 11:48:19,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 157 flow [2023-11-26 11:48:19,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 157 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:48:19,545 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 72 flow [2023-11-26 11:48:19,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-26 11:48:19,549 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-26 11:48:19,549 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 72 flow [2023-11-26 11:48:19,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:19,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:19,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:48:19,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:19,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1126795683, now seen corresponding path program 1 times [2023-11-26 11:48:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361626336] [2023-11-26 11:48:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:19,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:19,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361626336] [2023-11-26 11:48:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361626336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:19,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171364295] [2023-11-26 11:48:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:19,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:19,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:19,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:19,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:19,889 INFO L124 PetriNetUnfolderBase]: 160/327 cut-off events. [2023-11-26 11:48:19,890 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:48:19,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 327 events. 160/327 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1159 event pairs, 127 based on Foata normal form. 8/315 useless extension candidates. Maximal degree in co-relation 668. Up to 279 conditions per place. [2023-11-26 11:48:19,894 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 29 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-26 11:48:19,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 148 flow [2023-11-26 11:48:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:48:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-26 11:48:19,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-11-26 11:48:19,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-26 11:48:19,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-26 11:48:19,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:19,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-26 11:48:19,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,906 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 56 transitions. [2023-11-26 11:48:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 148 flow [2023-11-26 11:48:19,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:48:19,914 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 80 flow [2023-11-26 11:48:19,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-26 11:48:19,916 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-11-26 11:48:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 80 flow [2023-11-26 11:48:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:48:19,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:19,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1293593400, now seen corresponding path program 1 times [2023-11-26 11:48:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717936360] [2023-11-26 11:48:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:19,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717936360] [2023-11-26 11:48:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717936360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592664045] [2023-11-26 11:48:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:20,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:20,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:20,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:20,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:20,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:48:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:20,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:20,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592664045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:20,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:20,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-26 11:48:20,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990983556] [2023-11-26 11:48:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:20,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:20,511 INFO L124 PetriNetUnfolderBase]: 123/290 cut-off events. [2023-11-26 11:48:20,512 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:48:20,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 290 events. 123/290 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1064 event pairs, 35 based on Foata normal form. 10/282 useless extension candidates. Maximal degree in co-relation 593. Up to 158 conditions per place. [2023-11-26 11:48:20,516 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 30 selfloop transitions, 3 changer transitions 1/39 dead transitions. [2023-11-26 11:48:20,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 167 flow [2023-11-26 11:48:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:48:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2023-11-26 11:48:20,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2023-11-26 11:48:20,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 59 transitions. [2023-11-26 11:48:20,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 59 transitions. [2023-11-26 11:48:20,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:20,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 59 transitions. [2023-11-26 11:48:20,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,527 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 80 flow. Second operand 3 states and 59 transitions. [2023-11-26 11:48:20,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 167 flow [2023-11-26 11:48:20,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 163 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:48:20,532 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 82 flow [2023-11-26 11:48:20,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-26 11:48:20,535 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-26 11:48:20,536 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 82 flow [2023-11-26 11:48:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:20,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:20,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:20,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:20,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:20,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 648405293, now seen corresponding path program 1 times [2023-11-26 11:48:20,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:20,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524094370] [2023-11-26 11:48:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524094370] [2023-11-26 11:48:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524094370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111039298] [2023-11-26 11:48:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:20,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:20,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:20,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:20,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:21,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:21,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:21,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111039298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:21,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:21,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:48:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760914538] [2023-11-26 11:48:21,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:21,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:21,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:21,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:21,297 INFO L124 PetriNetUnfolderBase]: 141/302 cut-off events. [2023-11-26 11:48:21,297 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-26 11:48:21,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 302 events. 141/302 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 974 event pairs, 99 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 687. Up to 229 conditions per place. [2023-11-26 11:48:21,299 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 40 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-26 11:48:21,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 224 flow [2023-11-26 11:48:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:48:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2023-11-26 11:48:21,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2023-11-26 11:48:21,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 96 transitions. [2023-11-26 11:48:21,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 96 transitions. [2023-11-26 11:48:21,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:21,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 96 transitions. [2023-11-26 11:48:21,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:21,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:21,304 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:21,304 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 82 flow. Second operand 6 states and 96 transitions. [2023-11-26 11:48:21,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 224 flow [2023-11-26 11:48:21,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:48:21,307 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 115 flow [2023-11-26 11:48:21,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-26 11:48:21,308 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-11-26 11:48:21,308 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 115 flow [2023-11-26 11:48:21,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:21,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:21,309 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:21,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:21,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:21,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 760911586, now seen corresponding path program 2 times [2023-11-26 11:48:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255361694] [2023-11-26 11:48:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255361694] [2023-11-26 11:48:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255361694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353448357] [2023-11-26 11:48:21,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:21,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:21,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:21,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:22,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:48:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:22,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:22,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:22,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:22,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353448357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:22,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:22,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-26 11:48:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772849725] [2023-11-26 11:48:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:48:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:48:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:48:22,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:22,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 115 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:22,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:22,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:22,440 INFO L124 PetriNetUnfolderBase]: 177/374 cut-off events. [2023-11-26 11:48:22,440 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-11-26 11:48:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 374 events. 177/374 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1174 event pairs, 99 based on Foata normal form. 36/394 useless extension candidates. Maximal degree in co-relation 965. Up to 229 conditions per place. [2023-11-26 11:48:22,469 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 64 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-26 11:48:22,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 401 flow [2023-11-26 11:48:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:48:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:48:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2023-11-26 11:48:22,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2023-11-26 11:48:22,473 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 177 transitions. [2023-11-26 11:48:22,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 177 transitions. [2023-11-26 11:48:22,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:22,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 177 transitions. [2023-11-26 11:48:22,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.75) internal successors, (177), 12 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:22,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 41.0) internal successors, (533), 13 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:22,478 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 41.0) internal successors, (533), 13 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:22,478 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 115 flow. Second operand 12 states and 177 transitions. [2023-11-26 11:48:22,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 401 flow [2023-11-26 11:48:22,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 387 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:48:22,484 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 185 flow [2023-11-26 11:48:22,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=185, PETRI_PLACES=59, PETRI_TRANSITIONS=40} [2023-11-26 11:48:22,486 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2023-11-26 11:48:22,486 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 185 flow [2023-11-26 11:48:22,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:22,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:22,487 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:22,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:22,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:48:22,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:22,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 843277058, now seen corresponding path program 3 times [2023-11-26 11:48:22,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603058124] [2023-11-26 11:48:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:23,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:23,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603058124] [2023-11-26 11:48:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603058124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365881194] [2023-11-26 11:48:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:48:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:23,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:23,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:31,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-26 11:48:31,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:31,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:48:31,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:31,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:31,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365881194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:31,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:31,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-26 11:48:31,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983612602] [2023-11-26 11:48:31,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:31,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:48:32,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:48:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:48:32,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:32,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 40 transitions, 185 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:32,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:32,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:32,585 INFO L124 PetriNetUnfolderBase]: 249/518 cut-off events. [2023-11-26 11:48:32,585 INFO L125 PetriNetUnfolderBase]: For 2937/2937 co-relation queries the response was YES. [2023-11-26 11:48:32,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 518 events. 249/518 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1575 event pairs, 99 based on Foata normal form. 72/574 useless extension candidates. Maximal degree in co-relation 1595. Up to 229 conditions per place. [2023-11-26 11:48:32,591 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 112 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2023-11-26 11:48:32,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 771 flow [2023-11-26 11:48:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:48:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:48:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 339 transitions. [2023-11-26 11:48:32,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2023-11-26 11:48:32,595 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 339 transitions. [2023-11-26 11:48:32,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 339 transitions. [2023-11-26 11:48:32,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:32,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 339 transitions. [2023-11-26 11:48:32,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 14.125) internal successors, (339), 24 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:32,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 41.0) internal successors, (1025), 25 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:32,602 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 41.0) internal successors, (1025), 25 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:32,602 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 185 flow. Second operand 24 states and 339 transitions. [2023-11-26 11:48:32,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 771 flow [2023-11-26 11:48:32,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 699 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-26 11:48:32,614 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 305 flow [2023-11-26 11:48:32,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=305, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2023-11-26 11:48:32,615 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2023-11-26 11:48:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 305 flow [2023-11-26 11:48:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:32,617 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:32,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:32,830 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:32,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 530723650, now seen corresponding path program 4 times [2023-11-26 11:48:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:32,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190967322] [2023-11-26 11:48:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190967322] [2023-11-26 11:48:34,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190967322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093251676] [2023-11-26 11:48:34,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:48:34,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:34,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:34,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:34,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:48:34,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:34,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:48:34,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:34,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093251676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:35,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:35,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-26 11:48:35,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207333994] [2023-11-26 11:48:35,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-26 11:48:35,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-26 11:48:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 11:48:35,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-26 11:48:35,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 305 flow. Second operand has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:35,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:35,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-26 11:48:35,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:36,756 INFO L124 PetriNetUnfolderBase]: 393/806 cut-off events. [2023-11-26 11:48:36,756 INFO L125 PetriNetUnfolderBase]: For 31653/31653 co-relation queries the response was YES. [2023-11-26 11:48:36,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2752 conditions, 806 events. 393/806 cut-off events. For 31653/31653 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2362 event pairs, 99 based on Foata normal form. 144/934 useless extension candidates. Maximal degree in co-relation 2723. Up to 235 conditions per place. [2023-11-26 11:48:36,766 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 208 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2023-11-26 11:48:36,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 1467 flow [2023-11-26 11:48:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 11:48:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-26 11:48:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 663 transitions. [2023-11-26 11:48:36,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33689024390243905 [2023-11-26 11:48:36,773 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 663 transitions. [2023-11-26 11:48:36,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 663 transitions. [2023-11-26 11:48:36,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:36,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 663 transitions. [2023-11-26 11:48:36,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 13.8125) internal successors, (663), 48 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:36,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 41.0) internal successors, (2009), 49 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:36,784 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 41.0) internal successors, (2009), 49 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:36,784 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 305 flow. Second operand 48 states and 663 transitions. [2023-11-26 11:48:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 1467 flow [2023-11-26 11:48:36,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 260 transitions, 1323 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-11-26 11:48:36,815 INFO L231 Difference]: Finished difference. Result has 149 places, 76 transitions, 545 flow [2023-11-26 11:48:36,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=545, PETRI_PLACES=149, PETRI_TRANSITIONS=76} [2023-11-26 11:48:36,820 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 112 predicate places. [2023-11-26 11:48:36,820 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 76 transitions, 545 flow [2023-11-26 11:48:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:36,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:36,821 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:36,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:37,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:48:37,029 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:48:37,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2079542334, now seen corresponding path program 5 times [2023-11-26 11:48:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563567495] [2023-11-26 11:48:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:41,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:41,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563567495] [2023-11-26 11:48:41,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563567495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:41,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181812786] [2023-11-26 11:48:41,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:48:41,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:41,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:41,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f0f7eb-c7c1-4121-be68-41a46bf57c10/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process