./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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/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_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 21:57:47,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:57:47,758 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:57:47,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:57:47,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:57:47,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:57:47,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:57:47,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:57:47,833 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:57:47,841 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:57:47,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:57:47,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:57:47,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:57:47,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:57:47,845 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:57:47,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:57:47,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:57:47,849 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:57:47,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:57:47,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:57:47,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:57:47,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:57:47,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:57:47,854 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:57:47,855 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:57:47,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:57:47,880 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:57:47,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:57:47,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:57:47,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:57:47,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:57:47,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:47,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:57:47,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:57:47,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:57:47,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:57:47,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:57:47,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:57:47,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:57:47,886 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:57:47,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:57:47,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:57:47,889 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_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-24 21:57:48,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:57:48,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:57:48,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:57:48,318 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:57:48,318 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:57:48,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-24 21:57:51,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:57:51,896 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:57:51,897 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-24 21:57:51,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/data/24b9cdc76/bc4ceeb04c1d437eaabf7ace43184798/FLAG51118deef [2023-11-24 21:57:51,937 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/data/24b9cdc76/bc4ceeb04c1d437eaabf7ace43184798 [2023-11-24 21:57:51,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:57:51,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:57:51,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:51,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:57:51,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:57:51,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:51" (1/1) ... [2023-11-24 21:57:51,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e87b9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:51, skipping insertion in model container [2023-11-24 21:57:51,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:51" (1/1) ... [2023-11-24 21:57:52,024 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:57:52,209 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_7681c13f-5d8f-470a-853e-ed3050eb2397/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-24 21:57:52,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:52,781 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:57:52,797 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_7681c13f-5d8f-470a-853e-ed3050eb2397/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-24 21:57:52,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:52,997 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:57:52,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52 WrapperNode [2023-11-24 21:57:52,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:52,999 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:53,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:57:53,000 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:57:53,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,156 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-24 21:57:53,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:53,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:57:53,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:57:53,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:57:53,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,225 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]. [2023-11-24 21:57:53,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,243 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:57:53,262 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:57:53,262 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:57:53,262 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:57:53,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (1/1) ... [2023-11-24 21:57:53,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:53,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:57:53,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:57:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:57:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:57:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:57:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:57:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:57:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:57:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-24 21:57:53,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-24 21:57:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:57:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:57:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:57:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:57:53,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:57:53,353 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:57:53,506 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:57:53,509 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:57:53,746 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:57:53,938 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:57:53,938 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:57:53,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:53 BoogieIcfgContainer [2023-11-24 21:57:53,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:57:53,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:57:53,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:57:53,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:57:53,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:57:51" (1/3) ... [2023-11-24 21:57:53,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b194de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:53, skipping insertion in model container [2023-11-24 21:57:53,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:52" (2/3) ... [2023-11-24 21:57:53,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b194de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:53, skipping insertion in model container [2023-11-24 21:57:53,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:53" (3/3) ... [2023-11-24 21:57:53,953 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-24 21:57:53,964 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:57:53,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:57:53,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:57:53,976 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:57:54,021 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-24 21:57:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2023-11-24 21:57:54,108 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-24 21:57:54,108 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:57:54,112 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. [2023-11-24 21:57:54,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2023-11-24 21:57:54,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2023-11-24 21:57:54,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:57:54,146 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;@5dd055dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:57:54,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 21:57:54,154 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:57:54,156 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-24 21:57:54,157 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:57:54,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:54,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:54,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:54,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1428559675, now seen corresponding path program 1 times [2023-11-24 21:57:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:54,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291460320] [2023-11-24 21:57:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:54,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291460320] [2023-11-24 21:57:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291460320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:54,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752019924] [2023-11-24 21:57:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:54,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:54,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-24 21:57:54,552 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) [2023-11-24 21:57:54,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:54,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-24 21:57:54,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:54,664 INFO L124 PetriNetUnfolderBase]: 61/133 cut-off events. [2023-11-24 21:57:54,664 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:57:54,666 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. [2023-11-24 21:57:54,669 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-24 21:57:54,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2023-11-24 21:57:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-24 21:57:54,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 21:57:54,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-24 21:57:54,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-24 21:57:54,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:54,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-24 21:57:54,690 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) [2023-11-24 21:57:54,694 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) [2023-11-24 21:57:54,695 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) [2023-11-24 21:57:54,697 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2023-11-24 21:57:54,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2023-11-24 21:57:54,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:54,704 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2023-11-24 21:57:54,706 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} [2023-11-24 21:57:54,710 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-24 21:57:54,710 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2023-11-24 21:57:54,710 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) [2023-11-24 21:57:54,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:54,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:57:54,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:54,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 186676813, now seen corresponding path program 1 times [2023-11-24 21:57:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:54,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317665582] [2023-11-24 21:57:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:54,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317665582] [2023-11-24 21:57:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317665582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:54,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359991374] [2023-11-24 21:57:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:54,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:54,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-24 21:57:54,901 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) [2023-11-24 21:57:54,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:54,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-24 21:57:54,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:55,097 INFO L124 PetriNetUnfolderBase]: 101/223 cut-off events. [2023-11-24 21:57:55,098 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-24 21:57:55,100 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. [2023-11-24 21:57:55,116 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-24 21:57:55,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2023-11-24 21:57:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-24 21:57:55,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 21:57:55,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-24 21:57:55,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-24 21:57:55,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:55,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-24 21:57:55,120 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) [2023-11-24 21:57:55,121 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) [2023-11-24 21:57:55,121 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) [2023-11-24 21:57:55,121 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2023-11-24 21:57:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2023-11-24 21:57:55,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:55,124 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2023-11-24 21:57:55,124 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} [2023-11-24 21:57:55,125 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-24 21:57:55,125 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2023-11-24 21:57:55,125 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) [2023-11-24 21:57:55,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:55,126 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] [2023-11-24 21:57:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:57:55,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:55,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash -791721388, now seen corresponding path program 1 times [2023-11-24 21:57:55,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:55,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649678213] [2023-11-24 21:57:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:55,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649678213] [2023-11-24 21:57:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649678213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856972423] [2023-11-24 21:57:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:55,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-24 21:57:55,357 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) [2023-11-24 21:57:55,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:55,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-24 21:57:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:55,438 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2023-11-24 21:57:55,438 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-24 21:57:55,439 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. [2023-11-24 21:57:55,441 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-24 21:57:55,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2023-11-24 21:57:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-24 21:57:55,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 21:57:55,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-24 21:57:55,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-24 21:57:55,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:55,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-24 21:57:55,445 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) [2023-11-24 21:57:55,446 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) [2023-11-24 21:57:55,446 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) [2023-11-24 21:57:55,447 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2023-11-24 21:57:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2023-11-24 21:57:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:55,449 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2023-11-24 21:57:55,450 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} [2023-11-24 21:57:55,451 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2023-11-24 21:57:55,451 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2023-11-24 21:57:55,451 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) [2023-11-24 21:57:55,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:55,452 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] [2023-11-24 21:57:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:57:55,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:55,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1020515750, now seen corresponding path program 2 times [2023-11-24 21:57:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99549430] [2023-11-24 21:57:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99549430] [2023-11-24 21:57:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99549430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832072829] [2023-11-24 21:57:55,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:57:55,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:55,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:55,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:57:55,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:57:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:57:55,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:57:55,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:55,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:55,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832072829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:55,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:55,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 21:57:55,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042196929] [2023-11-24 21:57:55,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:55,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:57:55,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:57:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:55,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:57:55,910 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) [2023-11-24 21:57:55,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:55,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:57:55,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:56,104 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2023-11-24 21:57:56,104 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-24 21:57:56,106 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. [2023-11-24 21:57:56,109 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-24 21:57:56,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2023-11-24 21:57:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:57:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-24 21:57:56,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 21:57:56,112 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:56,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,114 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) [2023-11-24 21:57:56,115 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) [2023-11-24 21:57:56,115 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) [2023-11-24 21:57:56,115 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2023-11-24 21:57:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2023-11-24 21:57:56,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:56,119 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2023-11-24 21:57:56,119 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} [2023-11-24 21:57:56,120 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-24 21:57:56,120 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2023-11-24 21:57:56,121 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) [2023-11-24 21:57:56,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:56,121 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] [2023-11-24 21:57:56,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:56,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -660696479, now seen corresponding path program 3 times [2023-11-24 21:57:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972525397] [2023-11-24 21:57:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 21:57:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972525397] [2023-11-24 21:57:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972525397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897248218] [2023-11-24 21:57:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:57:56,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:56,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:56,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:57:56,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:57:56,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:57:56,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:57:56,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 21:57:56,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 21:57:56,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897248218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:56,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:56,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 21:57:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065716047] [2023-11-24 21:57:56,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:56,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:57:56,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:57:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:56,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:57:56,659 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) [2023-11-24 21:57:56,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:56,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:57:56,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:56,919 INFO L124 PetriNetUnfolderBase]: 294/694 cut-off events. [2023-11-24 21:57:56,920 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-11-24 21:57:56,923 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. [2023-11-24 21:57:56,928 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-24 21:57:56,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2023-11-24 21:57:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:57:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-24 21:57:56,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 21:57:56,934 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:56,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-24 21:57:56,937 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) [2023-11-24 21:57:56,940 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) [2023-11-24 21:57:56,940 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) [2023-11-24 21:57:56,940 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2023-11-24 21:57:56,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2023-11-24 21:57:56,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:56,951 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2023-11-24 21:57:56,952 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} [2023-11-24 21:57:56,955 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-24 21:57:56,955 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2023-11-24 21:57:56,955 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) [2023-11-24 21:57:56,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:56,956 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] [2023-11-24 21:57:56,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:57,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:57,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:57,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 478578983, now seen corresponding path program 4 times [2023-11-24 21:57:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:57,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365557318] [2023-11-24 21:57:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:57:57,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365557318] [2023-11-24 21:57:57,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365557318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057400035] [2023-11-24 21:57:57,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:57:57,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:57,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:57,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:57:57,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:57:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:57:57,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:57:57,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 21:57:57,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 21:57:57,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057400035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:57,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-24 21:57:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697293473] [2023-11-24 21:57:57,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:57,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:57:57,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:57,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:57:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:57:57,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:57:57,853 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) [2023-11-24 21:57:57,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:57,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:57:57,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:59,516 INFO L124 PetriNetUnfolderBase]: 899/2078 cut-off events. [2023-11-24 21:57:59,517 INFO L125 PetriNetUnfolderBase]: For 3911/3911 co-relation queries the response was YES. [2023-11-24 21:57:59,526 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. [2023-11-24 21:57:59,543 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 470 selfloop transitions, 138 changer transitions 0/612 dead transitions. [2023-11-24 21:57:59,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 612 transitions, 3744 flow [2023-11-24 21:57:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-24 21:57:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-24 21:57:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 990 transitions. [2023-11-24 21:57:59,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156716417910447 [2023-11-24 21:57:59,550 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 990 transitions. [2023-11-24 21:57:59,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 990 transitions. [2023-11-24 21:57:59,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:59,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 990 transitions. [2023-11-24 21:57:59,555 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) [2023-11-24 21:57:59,561 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) [2023-11-24 21:57:59,563 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) [2023-11-24 21:57:59,563 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 67 states and 990 transitions. [2023-11-24 21:57:59,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 612 transitions, 3744 flow [2023-11-24 21:57:59,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 612 transitions, 3624 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:59,590 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1564 flow [2023-11-24 21:57:59,590 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} [2023-11-24 21:57:59,591 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2023-11-24 21:57:59,591 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1564 flow [2023-11-24 21:57:59,592 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) [2023-11-24 21:57:59,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:59,592 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] [2023-11-24 21:57:59,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:59,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:59,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:57:59,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash 914665606, now seen corresponding path program 5 times [2023-11-24 21:57:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586124816] [2023-11-24 21:57:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-24 21:58:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586124816] [2023-11-24 21:58:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586124816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109586014] [2023-11-24 21:58:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:58:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:00,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:00,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:58:00,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-24 21:58:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:00,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:58:00,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-24 21:58:00,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-24 21:58:00,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109586014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:00,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:00,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-24 21:58:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369340328] [2023-11-24 21:58:00,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:58:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:58:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:58:00,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:58:00,720 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) [2023-11-24 21:58:00,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:00,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:58:00,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:02,445 INFO L124 PetriNetUnfolderBase]: 1737/4098 cut-off events. [2023-11-24 21:58:02,445 INFO L125 PetriNetUnfolderBase]: For 95207/95207 co-relation queries the response was YES. [2023-11-24 21:58:02,474 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. [2023-11-24 21:58:02,509 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 248 selfloop transitions, 144 changer transitions 0/402 dead transitions. [2023-11-24 21:58:02,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 402 transitions, 4818 flow [2023-11-24 21:58:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:58:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:58:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2023-11-24 21:58:02,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-24 21:58:02,512 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 222 transitions. [2023-11-24 21:58:02,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 222 transitions. [2023-11-24 21:58:02,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:02,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 222 transitions. [2023-11-24 21:58:02,514 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) [2023-11-24 21:58:02,515 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) [2023-11-24 21:58:02,516 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) [2023-11-24 21:58:02,516 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1564 flow. Second operand 14 states and 222 transitions. [2023-11-24 21:58:02,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 402 transitions, 4818 flow [2023-11-24 21:58:02,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 402 transitions, 4674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:58:02,906 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2478 flow [2023-11-24 21:58:02,907 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} [2023-11-24 21:58:02,907 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-24 21:58:02,908 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2478 flow [2023-11-24 21:58:02,908 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) [2023-11-24 21:58:02,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:02,908 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] [2023-11-24 21:58:02,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 21:58:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:58:03,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:58:03,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1025122131, now seen corresponding path program 6 times [2023-11-24 21:58:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:03,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266630960] [2023-11-24 21:58:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-24 21:58:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266630960] [2023-11-24 21:58:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266630960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:03,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014788863] [2023-11-24 21:58:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:58:03,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:03,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:58:04,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-24 21:58:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:04,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:58:04,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-24 21:58:04,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-24 21:58:04,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014788863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:04,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:04,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2023-11-24 21:58:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183862689] [2023-11-24 21:58:05,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:05,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 21:58:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 21:58:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:58:05,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:58:05,041 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) [2023-11-24 21:58:05,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:05,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:58:05,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:22,930 INFO L124 PetriNetUnfolderBase]: 3735/8734 cut-off events. [2023-11-24 21:58:22,930 INFO L125 PetriNetUnfolderBase]: For 539787/539787 co-relation queries the response was YES. [2023-11-24 21:58:23,036 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. [2023-11-24 21:58:23,108 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2072 selfloop transitions, 742 changer transitions 0/2819 dead transitions. [2023-11-24 21:58:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2819 transitions, 23814 flow [2023-11-24 21:58:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2023-11-24 21:58:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2023-11-24 21:58:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 4300 transitions. [2023-11-24 21:58:23,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2023-11-24 21:58:23,125 INFO L72 ComplementDD]: Start complementDD. Operand 295 states and 4300 transitions. [2023-11-24 21:58:23,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 295 states and 4300 transitions. [2023-11-24 21:58:23,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:23,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 295 states and 4300 transitions. [2023-11-24 21:58:23,143 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) [2023-11-24 21:58:23,175 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) [2023-11-24 21:58:23,179 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) [2023-11-24 21:58:23,179 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2478 flow. Second operand 295 states and 4300 transitions. [2023-11-24 21:58:23,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2819 transitions, 23814 flow [2023-11-24 21:58:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2819 transitions, 23504 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:58:23,638 INFO L231 Difference]: Finished difference. Result has 621 places, 798 transitions, 11120 flow [2023-11-24 21:58:23,640 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} [2023-11-24 21:58:23,643 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 599 predicate places. [2023-11-24 21:58:23,643 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 798 transitions, 11120 flow [2023-11-24 21:58:23,644 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) [2023-11-24 21:58:23,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:23,647 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] [2023-11-24 21:58:23,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:23,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:58:23,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:58:23,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1474069254, now seen corresponding path program 7 times [2023-11-24 21:58:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591425709] [2023-11-24 21:58:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-24 21:58:24,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591425709] [2023-11-24 21:58:24,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591425709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:24,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389808814] [2023-11-24 21:58:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:58:24,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:24,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:24,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7681c13f-5d8f-470a-853e-ed3050eb2397/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:58:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:24,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:58:24,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-24 21:58:25,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-24 21:58:25,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389808814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:25,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:25,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2023-11-24 21:58:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868676839] [2023-11-24 21:58:25,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:58:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:58:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:58:25,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:58:25,703 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) [2023-11-24 21:58:25,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:25,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:58:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:35,170 INFO L124 PetriNetUnfolderBase]: 5495/13508 cut-off events. [2023-11-24 21:58:35,171 INFO L125 PetriNetUnfolderBase]: For 2387531/2387531 co-relation queries the response was YES. [2023-11-24 21:58:35,455 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. [2023-11-24 21:58:35,674 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 652 changer transitions 0/1286 dead transitions. [2023-11-24 21:58:35,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1286 transitions, 25768 flow [2023-11-24 21:58:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:58:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:58:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 350 transitions. [2023-11-24 21:58:35,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628787878787878 [2023-11-24 21:58:35,677 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 350 transitions. [2023-11-24 21:58:35,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 350 transitions. [2023-11-24 21:58:35,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:35,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 350 transitions. [2023-11-24 21:58:35,680 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) [2023-11-24 21:58:35,681 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) [2023-11-24 21:58:35,681 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) [2023-11-24 21:58:35,682 INFO L175 Difference]: Start difference. First operand has 621 places, 798 transitions, 11120 flow. Second operand 22 states and 350 transitions. [2023-11-24 21:58:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1286 transitions, 25768 flow