./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/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_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/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_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:19,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:19,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:19,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:19,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:20,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:20,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:20,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:20,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:20,025 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:20,025 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:20,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:20,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:20,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:20,029 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:20,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:20,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:20,030 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:20,031 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:20,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:20,033 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:20,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:20,034 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:20,034 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:20,035 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:20,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:20,036 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:20,037 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:20,037 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:20,037 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:20,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:20,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:20,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:20,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:20,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:20,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:20,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:20,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:20,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:20,041 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:20,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:20,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:20,042 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_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-26 11:55:20,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:20,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:20,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:20,422 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:20,422 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:20,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-26 11:55:23,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:23,924 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:23,926 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-26 11:55:23,955 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/data/e6ea99bc7/ae80aa8ccf1b4f0b89af40c48a3c7f53/FLAGfa82b0844 [2023-11-26 11:55:23,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/data/e6ea99bc7/ae80aa8ccf1b4f0b89af40c48a3c7f53 [2023-11-26 11:55:23,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:23,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:23,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:23,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:23,995 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:23,996 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:23" (1/1) ... [2023-11-26 11:55:23,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8bed57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:23, skipping insertion in model container [2023-11-26 11:55:23,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:23" (1/1) ... [2023-11-26 11:55:24,060 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:24,249 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_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-26 11:55:24,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:24,795 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:24,810 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_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-26 11:55:24,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:24,970 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:24,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24 WrapperNode [2023-11-26 11:55:24,971 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:24,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:24,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:24,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:24,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,036 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-26 11:55:25,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:25,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:25,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:25,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:25,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,066 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-11-26 11:55:25,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:25,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:25,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:25,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:25,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (1/1) ... [2023-11-26 11:55:25,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:25,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:25,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:55:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-26 11:55:25,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-26 11:55:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:25,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:25,206 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 11:55:25,354 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:25,356 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:25,516 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:25,661 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:25,665 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:55:25,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:25 BoogieIcfgContainer [2023-11-26 11:55:25,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:25,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:25,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:25,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:25,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:23" (1/3) ... [2023-11-26 11:55:25,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1495f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:25, skipping insertion in model container [2023-11-26 11:55:25,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:24" (2/3) ... [2023-11-26 11:55:25,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1495f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:25, skipping insertion in model container [2023-11-26 11:55:25,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:25" (3/3) ... [2023-11-26 11:55:25,682 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-26 11:55:25,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:25,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:25,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:25,705 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:25,745 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 11:55:25,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2023-11-26 11:55:25,810 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-26 11:55:25,811 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:55:25,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-26 11:55:25,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2023-11-26 11:55:25,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2023-11-26 11:55:25,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:25,835 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;@1b85ce89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:25,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 11:55:25,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:25,852 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-26 11:55:25,852 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:55:25,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:25,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:25,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:25,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1428559675, now seen corresponding path program 1 times [2023-11-26 11:55:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825583973] [2023-11-26 11:55:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,165 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 11:55:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825583973] [2023-11-26 11:55:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825583973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:26,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:26,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553023547] [2023-11-26 11:55:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:26,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-26 11:55:26,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:26,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:26,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-26 11:55:26,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:26,312 INFO L124 PetriNetUnfolderBase]: 61/133 cut-off events. [2023-11-26 11:55:26,313 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:55:26,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 133 events. 61/133 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 27 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 247. Up to 77 conditions per place. [2023-11-26 11:55:26,317 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-26 11:55:26,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2023-11-26 11:55:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-26 11:55:26,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-26 11:55:26,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:26,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:26,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,343 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2023-11-26 11:55:26,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2023-11-26 11:55:26,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:26,350 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2023-11-26 11:55:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-26 11:55:26,356 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-26 11:55:26,356 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2023-11-26 11:55:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:26,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:26,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:26,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:26,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 186676813, now seen corresponding path program 1 times [2023-11-26 11:55:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:26,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281978218] [2023-11-26 11:55:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,483 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 11:55:26,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:26,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281978218] [2023-11-26 11:55:26,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281978218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:26,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984608371] [2023-11-26 11:55:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:26,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-26 11:55:26,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 11:55:26,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:26,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-26 11:55:26,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:26,673 INFO L124 PetriNetUnfolderBase]: 101/223 cut-off events. [2023-11-26 11:55:26,676 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-26 11:55:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 223 events. 101/223 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 827 event pairs, 45 based on Foata normal form. 10/233 useless extension candidates. Maximal degree in co-relation 147. Up to 125 conditions per place. [2023-11-26 11:55:26,683 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-26 11:55:26,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2023-11-26 11:55:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-26 11:55:26,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-26 11:55:26,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:26,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-26 11:55:26,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:26,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,688 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2023-11-26 11:55:26,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2023-11-26 11:55:26,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:26,691 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2023-11-26 11:55:26,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-26 11:55:26,692 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-26 11:55:26,692 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2023-11-26 11:55:26,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 11:55:26,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:26,693 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 11:55:26,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:26,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:26,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash -791721388, now seen corresponding path program 1 times [2023-11-26 11:55:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:26,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700682944] [2023-11-26 11:55:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:26,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:26,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700682944] [2023-11-26 11:55:26,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700682944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:26,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:26,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213348988] [2023-11-26 11:55:26,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:26,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-26 11:55:26,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 11:55:26,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:26,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-26 11:55:26,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:26,916 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2023-11-26 11:55:26,924 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-26 11:55:26,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 529 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 132. Up to 80 conditions per place. [2023-11-26 11:55:26,927 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-26 11:55:26,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2023-11-26 11:55:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-26 11:55:26,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-26 11:55:26,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-26 11:55:26,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-26 11:55:26,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:26,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-26 11:55:26,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 11:55:26,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 11:55:26,935 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2023-11-26 11:55:26,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2023-11-26 11:55:26,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:26,941 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2023-11-26 11:55:26,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-26 11:55:26,942 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2023-11-26 11:55:26,944 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2023-11-26 11:55:26,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 11:55:26,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:26,945 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 11:55:26,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:26,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:26,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1020515750, now seen corresponding path program 2 times [2023-11-26 11:55:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743016342] [2023-11-26 11:55:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:27,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743016342] [2023-11-26 11:55:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743016342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114035686] [2023-11-26 11:55:27,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:27,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:27,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:27,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:27,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:55:27,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:27,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:27,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114035686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:27,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:27,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:55:27,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122032312] [2023-11-26 11:55:27,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:27,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:27,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:27,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 11:55:27,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:27,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:27,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:27,575 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2023-11-26 11:55:27,575 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-26 11:55:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1301 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2023-11-26 11:55:27,580 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-26 11:55:27,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2023-11-26 11:55:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-26 11:55:27,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-26 11:55:27,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-26 11:55:27,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-26 11:55:27,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:27,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-26 11:55:27,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 11:55:27,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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 11:55:27,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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 11:55:27,588 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2023-11-26 11:55:27,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2023-11-26 11:55:27,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:27,592 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2023-11-26 11:55:27,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-26 11:55:27,593 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-26 11:55:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2023-11-26 11:55:27,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 11:55:27,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:27,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:27,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:27,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash -660696479, now seen corresponding path program 3 times [2023-11-26 11:55:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612228884] [2023-11-26 11:55:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:27,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612228884] [2023-11-26 11:55:27,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612228884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620612632] [2023-11-26 11:55:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:27,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:27,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:28,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:55:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:28,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:55:28,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:28,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:55:28,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620612632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:28,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:28,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:55:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950292463] [2023-11-26 11:55:28,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:28,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:28,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:28,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 11:55:28,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:28,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:28,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:28,285 INFO L124 PetriNetUnfolderBase]: 294/694 cut-off events. [2023-11-26 11:55:28,285 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-11-26 11:55:28,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 694 events. 294/694 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2891 event pairs, 51 based on Foata normal form. 57/751 useless extension candidates. Maximal degree in co-relation 1232. Up to 156 conditions per place. [2023-11-26 11:55:28,293 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-26 11:55:28,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2023-11-26 11:55:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-26 11:55:28,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-26 11:55:28,295 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-26 11:55:28,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-26 11:55:28,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:28,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-26 11:55:28,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 11:55:28,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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 11:55:28,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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 11:55:28,298 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2023-11-26 11:55:28,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2023-11-26 11:55:28,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:28,303 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2023-11-26 11:55:28,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-26 11:55:28,304 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-26 11:55:28,305 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2023-11-26 11:55:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 11:55:28,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:28,305 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:28,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:28,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:28,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash 478578983, now seen corresponding path program 4 times [2023-11-26 11:55:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:28,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569840470] [2023-11-26 11:55:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:28,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 11:55:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569840470] [2023-11-26 11:55:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569840470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838723694] [2023-11-26 11:55:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:55:28,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:28,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:28,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:28,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:55:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:28,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:28,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-26 11:55:29,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-26 11:55:29,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838723694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:29,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:29,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-26 11:55:29,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180804072] [2023-11-26 11:55:29,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:29,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:55:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:55:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:55:29,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 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 11:55:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:29,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:29,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:30,861 INFO L124 PetriNetUnfolderBase]: 899/2078 cut-off events. [2023-11-26 11:55:30,862 INFO L125 PetriNetUnfolderBase]: For 3911/3911 co-relation queries the response was YES. [2023-11-26 11:55:30,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6873 conditions, 2078 events. 899/2078 cut-off events. For 3911/3911 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 10179 event pairs, 14 based on Foata normal form. 209/2287 useless extension candidates. Maximal degree in co-relation 3345. Up to 371 conditions per place. [2023-11-26 11:55:30,884 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 470 selfloop transitions, 138 changer transitions 0/612 dead transitions. [2023-11-26 11:55:30,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 612 transitions, 3744 flow [2023-11-26 11:55:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-26 11:55:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-26 11:55:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 990 transitions. [2023-11-26 11:55:30,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156716417910447 [2023-11-26 11:55:30,891 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 990 transitions. [2023-11-26 11:55:30,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 990 transitions. [2023-11-26 11:55:30,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:30,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 990 transitions. [2023-11-26 11:55:30,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 14.776119402985074) internal successors, (990), 67 states have internal predecessors, (990), 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 11:55:30,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 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 11:55:30,904 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 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 11:55:30,905 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 67 states and 990 transitions. [2023-11-26 11:55:30,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 612 transitions, 3744 flow [2023-11-26 11:55:30,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 612 transitions, 3624 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:30,929 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1564 flow [2023-11-26 11:55:30,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1564, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-11-26 11:55:30,930 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2023-11-26 11:55:30,931 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1564 flow [2023-11-26 11:55:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 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 11:55:30,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:30,931 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:30,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:55:31,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:31,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:31,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 914665606, now seen corresponding path program 5 times [2023-11-26 11:55:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945881334] [2023-11-26 11:55:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-26 11:55:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945881334] [2023-11-26 11:55:31,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945881334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044964671] [2023-11-26 11:55:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:55:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:31,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:31,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-26 11:55:31,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:31,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:55:31,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-26 11:55:31,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-26 11:55:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044964671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:32,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:32,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-26 11:55:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918328664] [2023-11-26 11:55:32,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:55:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:55:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:55:32,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:32,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1564 flow. Second operand has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 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 11:55:32,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:32,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:32,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:33,497 INFO L124 PetriNetUnfolderBase]: 1737/4098 cut-off events. [2023-11-26 11:55:33,497 INFO L125 PetriNetUnfolderBase]: For 95207/95207 co-relation queries the response was YES. [2023-11-26 11:55:33,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 4098 events. 1737/4098 cut-off events. For 95207/95207 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 22982 event pairs, 166 based on Foata normal form. 301/4389 useless extension candidates. Maximal degree in co-relation 16184. Up to 693 conditions per place. [2023-11-26 11:55:33,608 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 248 selfloop transitions, 144 changer transitions 0/402 dead transitions. [2023-11-26 11:55:33,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 402 transitions, 4818 flow [2023-11-26 11:55:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:55:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:55:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2023-11-26 11:55:33,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-26 11:55:33,610 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 222 transitions. [2023-11-26 11:55:33,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 222 transitions. [2023-11-26 11:55:33,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:33,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 222 transitions. [2023-11-26 11:55:33,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.857142857142858) internal successors, (222), 14 states have internal predecessors, (222), 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 11:55:33,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 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 11:55:33,613 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 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 11:55:33,613 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1564 flow. Second operand 14 states and 222 transitions. [2023-11-26 11:55:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 402 transitions, 4818 flow [2023-11-26 11:55:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 402 transitions, 4674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:34,048 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2478 flow [2023-11-26 11:55:34,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2478, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2023-11-26 11:55:34,049 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-26 11:55:34,049 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2478 flow [2023-11-26 11:55:34,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 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 11:55:34,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:34,050 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:34,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:34,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:55:34,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:34,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1025122131, now seen corresponding path program 6 times [2023-11-26 11:55:34,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:34,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995816916] [2023-11-26 11:55:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:34,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-26 11:55:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:35,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995816916] [2023-11-26 11:55:35,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995816916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052395389] [2023-11-26 11:55:35,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:55:35,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:35,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:35,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:35,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-26 11:55:35,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:35,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:55:35,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-26 11:55:35,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-26 11:55:36,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052395389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:36,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2023-11-26 11:55:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791480691] [2023-11-26 11:55:36,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 11:55:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 11:55:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:55:36,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:36,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2478 flow. Second operand has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 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 11:55:36,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:36,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:36,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:53,701 INFO L124 PetriNetUnfolderBase]: 3735/8734 cut-off events. [2023-11-26 11:55:53,701 INFO L125 PetriNetUnfolderBase]: For 539787/539787 co-relation queries the response was YES. [2023-11-26 11:55:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 8734 events. 3735/8734 cut-off events. For 539787/539787 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 53725 event pairs, 12 based on Foata normal form. 683/9417 useless extension candidates. Maximal degree in co-relation 37090. Up to 1545 conditions per place. [2023-11-26 11:55:53,811 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2072 selfloop transitions, 742 changer transitions 0/2819 dead transitions. [2023-11-26 11:55:53,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2819 transitions, 23814 flow [2023-11-26 11:55:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2023-11-26 11:55:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2023-11-26 11:55:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 4300 transitions. [2023-11-26 11:55:53,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2023-11-26 11:55:53,830 INFO L72 ComplementDD]: Start complementDD. Operand 295 states and 4300 transitions. [2023-11-26 11:55:53,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 295 states and 4300 transitions. [2023-11-26 11:55:53,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:53,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 295 states and 4300 transitions. [2023-11-26 11:55:53,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 296 states, 295 states have (on average 14.576271186440678) internal successors, (4300), 295 states have internal predecessors, (4300), 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 11:55:53,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 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 11:55:53,872 INFO L81 ComplementDD]: Finished complementDD. Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 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 11:55:53,873 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2478 flow. Second operand 295 states and 4300 transitions. [2023-11-26 11:55:53,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2819 transitions, 23814 flow [2023-11-26 11:55:54,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2819 transitions, 23504 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:55:54,488 INFO L231 Difference]: Finished difference. Result has 621 places, 798 transitions, 11120 flow [2023-11-26 11:55:54,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=295, PETRI_FLOW=11120, PETRI_PLACES=621, PETRI_TRANSITIONS=798} [2023-11-26 11:55:54,490 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 599 predicate places. [2023-11-26 11:55:54,490 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 798 transitions, 11120 flow [2023-11-26 11:55:54,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 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 11:55:54,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:54,491 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:54,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:55:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:55:54,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:54,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1474069254, now seen corresponding path program 7 times [2023-11-26 11:55:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260886746] [2023-11-26 11:55:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-26 11:55:55,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260886746] [2023-11-26 11:55:55,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260886746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422476086] [2023-11-26 11:55:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:55:55,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:55,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:55,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a32b8e9a-6616-41f3-85d6-154aebbdd6d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:55,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:55:55,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-26 11:55:56,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-26 11:55:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422476086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:56,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:56,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2023-11-26 11:55:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434741539] [2023-11-26 11:55:56,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:55:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:55:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:55:56,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:55:56,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 798 transitions, 11120 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 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 11:55:56,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:56,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:55:56,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:06,926 INFO L124 PetriNetUnfolderBase]: 5495/13508 cut-off events. [2023-11-26 11:56:06,926 INFO L125 PetriNetUnfolderBase]: For 2387531/2387531 co-relation queries the response was YES. [2023-11-26 11:56:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84423 conditions, 13508 events. 5495/13508 cut-off events. For 2387531/2387531 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 91175 event pairs, 300 based on Foata normal form. 651/14136 useless extension candidates. Maximal degree in co-relation 78065. Up to 2288 conditions per place. [2023-11-26 11:56:07,377 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 652 changer transitions 0/1286 dead transitions. [2023-11-26 11:56:07,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1286 transitions, 25768 flow [2023-11-26 11:56:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:56:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 11:56:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 350 transitions. [2023-11-26 11:56:07,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628787878787878 [2023-11-26 11:56:07,380 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 350 transitions. [2023-11-26 11:56:07,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 350 transitions. [2023-11-26 11:56:07,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:07,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 350 transitions. [2023-11-26 11:56:07,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 15.909090909090908) internal successors, (350), 22 states have internal predecessors, (350), 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 11:56:07,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 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 11:56:07,384 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 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 11:56:07,384 INFO L175 Difference]: Start difference. First operand has 621 places, 798 transitions, 11120 flow. Second operand 22 states and 350 transitions. [2023-11-26 11:56:07,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1286 transitions, 25768 flow