./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b86f47031b289f0a3d38d28ae23a5eeec0d0f07a5141173a4245010778c7f51 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:12:49,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:12:49,882 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:12:49,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:12:49,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:12:49,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:12:49,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:12:49,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:12:49,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:12:49,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:12:49,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:12:49,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:12:49,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:12:49,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:12:49,921 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:12:49,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:12:49,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:12:49,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:12:49,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:12:49,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:12:49,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:12:49,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:12:49,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:12:49,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:12:49,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:12:49,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:12:49,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:12:49,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:12:49,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:12:49,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:12:49,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:12:49,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:12:49,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:12:49,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:12:49,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:12:49,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:12:49,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:12:49,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:12:49,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:12:49,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:12:49,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:12:49,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:12:49,935 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_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b86f47031b289f0a3d38d28ae23a5eeec0d0f07a5141173a4245010778c7f51 [2024-10-31 22:12:50,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:12:50,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:12:50,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:12:50,232 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:12:50,233 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:12:50,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i Unable to find full path for "g++" [2024-10-31 22:12:52,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:12:52,813 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:12:52,815 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i [2024-10-31 22:12:52,864 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/data/b3ad20039/3754dc2dee5c419d83fd6c3917c2f761/FLAGb5e30283c [2024-10-31 22:12:52,884 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/data/b3ad20039/3754dc2dee5c419d83fd6c3917c2f761 [2024-10-31 22:12:52,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:12:52,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:12:52,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:52,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:12:52,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:12:52,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:52" (1/1) ... [2024-10-31 22:12:52,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549b42de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:52, skipping insertion in model container [2024-10-31 22:12:52,898 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:52" (1/1) ... [2024-10-31 22:12:53,039 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:12:53,500 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i[5469,5482] [2024-10-31 22:12:58,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:58,969 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:12:58,995 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/sv-benchmarks/c/pthread-driver-races/char_generic_nvram_read_nvram_write_nvram.i[5469,5482] [2024-10-31 22:12:59,153 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: asm volatile ("" "xchg" "b %b0, %1\n" : "+q" (__ret), "+m" (*((&head->first))) : : "memory", "cc"); [3227] [2024-10-31 22:12:59,156 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: asm volatile ("" "xchg" "w %w0, %1\n" : "+r" (__ret), "+m" (*((&head->first))) : : "memory", "cc"); [3227] [2024-10-31 22:12:59,156 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: asm volatile ("" "xchg" "l %0, %1\n" : "+r" (__ret), "+m" (*((&head->first))) : : "memory", "cc"); [3227] [2024-10-31 22:12:59,157 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: asm volatile ("" "xchg" "q %q0, %1\n" : "+r" (__ret), "+m" (*((&head->first))) : : "memory", "cc"); [3227] [2024-10-31 22:12:59,307 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: asm volatile("ud2"); [5816] [2024-10-31 22:12:59,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:59,870 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:12:59,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59 WrapperNode [2024-10-31 22:12:59,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:59,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:12:59,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:12:59,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:12:59,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,097 INFO L138 Inliner]: procedures = 1353, calls = 1478, calls flagged for inlining = 352, calls inlined = 18, statements flattened = 398 [2024-10-31 22:13:00,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:00,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:00,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:00,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:00,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,159 INFO L175 MemorySlicer]: Split 51 memory accesses to 7 slices as follows [2, 31, 1, 4, 2, 3, 8]. 61 percent of accesses are in the largest equivalence class. The 43 initializations are split as follows [2, 31, 1, 4, 2, 3, 0]. The 2 writes are split as follows [0, 0, 0, 0, 0, 0, 2]. [2024-10-31 22:13:00,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,189 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:00,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:00,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:00,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:00,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (1/1) ... [2024-10-31 22:13:00,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:00,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:00,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-31 22:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-31 22:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:00,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:13:00,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:13:00,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:13:00,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-31 22:13:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-31 22:13:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-31 22:13:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure whoop_wrapper_read_nvram [2024-10-31 22:13:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure whoop_wrapper_read_nvram [2024-10-31 22:13:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:13:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:13:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:13:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:13:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:13:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-31 22:13:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-10-31 22:13:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-10-31 22:13:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-10-31 22:13:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure whoop_wrapper_write_nvram [2024-10-31 22:13:00,293 INFO L138 BoogieDeclarations]: Found implementation of procedure whoop_wrapper_write_nvram [2024-10-31 22:13:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:13:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:13:00,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:13:00,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 22:13:00,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-31 22:13:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-31 22:13:00,297 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:13:00,843 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:00,846 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:13:01,636 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:13:01,636 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:13:02,416 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:13:02,417 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:13:02,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:02 BoogieIcfgContainer [2024-10-31 22:13:02,417 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:13:02,423 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:13:02,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:13:02,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:13:02,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:12:52" (1/3) ... [2024-10-31 22:13:02,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f3b5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:02, skipping insertion in model container [2024-10-31 22:13:02,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:59" (2/3) ... [2024-10-31 22:13:02,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f3b5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:02, skipping insertion in model container [2024-10-31 22:13:02,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:02" (3/3) ... [2024-10-31 22:13:02,439 INFO L112 eAbstractionObserver]: Analyzing ICFG char_generic_nvram_read_nvram_write_nvram.i [2024-10-31 22:13:02,462 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:13:02,462 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 22:13:02,462 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:13:02,561 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:13:02,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 52 transitions, 118 flow [2024-10-31 22:13:02,702 INFO L124 PetriNetUnfolderBase]: 10/50 cut-off events. [2024-10-31 22:13:02,702 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:13:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 50 events. 10/50 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2024-10-31 22:13:02,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 52 transitions, 118 flow [2024-10-31 22:13:02,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 48 transitions, 105 flow [2024-10-31 22:13:02,727 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:13:02,737 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11b716c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:13:02,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-31 22:13:02,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:13:02,767 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2024-10-31 22:13:02,767 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:13:02,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:02,768 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:02,769 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION === [whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-31 22:13:02,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1490717727, now seen corresponding path program 1 times [2024-10-31 22:13:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586883566] [2024-10-31 22:13:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586883566] [2024-10-31 22:13:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586883566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:04,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:04,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:13:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943882690] [2024-10-31 22:13:04,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:04,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:04,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:13:04,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-10-31 22:13:04,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:04,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:04,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-10-31 22:13:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:05,865 INFO L124 PetriNetUnfolderBase]: 1217/2007 cut-off events. [2024-10-31 22:13:05,866 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-31 22:13:05,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 2007 events. 1217/2007 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9258 event pairs, 395 based on Foata normal form. 69/1742 useless extension candidates. Maximal degree in co-relation 3849. Up to 969 conditions per place. [2024-10-31 22:13:05,884 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 95 selfloop transitions, 17 changer transitions 25/144 dead transitions. [2024-10-31 22:13:05,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 144 transitions, 583 flow [2024-10-31 22:13:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:13:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:13:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-10-31 22:13:05,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5264423076923077 [2024-10-31 22:13:05,908 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 105 flow. Second operand 8 states and 219 transitions. [2024-10-31 22:13:05,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 144 transitions, 583 flow [2024-10-31 22:13:05,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 144 transitions, 574 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:13:05,927 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 200 flow [2024-10-31 22:13:05,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2024-10-31 22:13:05,935 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-10-31 22:13:05,936 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 200 flow [2024-10-31 22:13:05,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:05,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:05,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:05,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:13:05,937 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION === [whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-31 22:13:05,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1371878629, now seen corresponding path program 1 times [2024-10-31 22:13:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645293643] [2024-10-31 22:13:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645293643] [2024-10-31 22:13:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645293643] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:13:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647802535] [2024-10-31 22:13:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:07,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:13:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:13:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:13:07,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-10-31 22:13:07,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:07,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:07,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-10-31 22:13:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:09,825 INFO L124 PetriNetUnfolderBase]: 2129/3593 cut-off events. [2024-10-31 22:13:09,825 INFO L125 PetriNetUnfolderBase]: For 1349/1349 co-relation queries the response was YES. [2024-10-31 22:13:09,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8655 conditions, 3593 events. 2129/3593 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19540 event pairs, 226 based on Foata normal form. 0/3270 useless extension candidates. Maximal degree in co-relation 8322. Up to 1052 conditions per place. [2024-10-31 22:13:09,850 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 159 selfloop transitions, 31 changer transitions 88/286 dead transitions. [2024-10-31 22:13:09,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 286 transitions, 1615 flow [2024-10-31 22:13:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:13:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-31 22:13:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-10-31 22:13:09,855 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47485207100591714 [2024-10-31 22:13:09,855 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 200 flow. Second operand 13 states and 321 transitions. [2024-10-31 22:13:09,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 286 transitions, 1615 flow [2024-10-31 22:13:09,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 286 transitions, 1615 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:13:09,882 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 476 flow [2024-10-31 22:13:09,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=476, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-10-31 22:13:09,883 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-10-31 22:13:09,883 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 476 flow [2024-10-31 22:13:09,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:09,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:09,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:09,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:13:09,885 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION === [whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-31 22:13:09,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash 840351997, now seen corresponding path program 1 times [2024-10-31 22:13:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007127123] [2024-10-31 22:13:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:09,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:12,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:12,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007127123] [2024-10-31 22:13:12,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007127123] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:12,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712195983] [2024-10-31 22:13:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:12,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:12,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:12,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:13:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:13,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:13:13,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:13,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-31 22:13:13,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2024-10-31 22:13:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:13,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:13:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712195983] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:13,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:13:13,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2024-10-31 22:13:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75036431] [2024-10-31 22:13:13,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:13,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:13:13,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-10-31 22:13:13,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:13,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:13,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-10-31 22:13:13,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:14,583 INFO L124 PetriNetUnfolderBase]: 1742/3046 cut-off events. [2024-10-31 22:13:14,583 INFO L125 PetriNetUnfolderBase]: For 2489/2489 co-relation queries the response was YES. [2024-10-31 22:13:14,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8984 conditions, 3046 events. 1742/3046 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 16677 event pairs, 809 based on Foata normal form. 52/2866 useless extension candidates. Maximal degree in co-relation 8738. Up to 1873 conditions per place. [2024-10-31 22:13:14,603 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 63 selfloop transitions, 24 changer transitions 77/174 dead transitions. [2024-10-31 22:13:14,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 174 transitions, 1179 flow [2024-10-31 22:13:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-10-31 22:13:14,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-10-31 22:13:14,606 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 476 flow. Second operand 7 states and 175 transitions. [2024-10-31 22:13:14,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 174 transitions, 1179 flow [2024-10-31 22:13:14,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 174 transitions, 1177 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:14,646 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 521 flow [2024-10-31 22:13:14,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-10-31 22:13:14,647 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-10-31 22:13:14,648 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 521 flow [2024-10-31 22:13:14,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:14,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:14,648 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:14,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:13:14,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff5932b-39df-4848-a1e7-5e5bff7b1534/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:14,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION === [whoop_wrapper_read_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, whoop_wrapper_write_nvramErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-31 22:13:14,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:14,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1846394986, now seen corresponding path program 1 times [2024-10-31 22:13:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930674341] [2024-10-31 22:13:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930674341] [2024-10-31 22:13:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930674341] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:18,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:18,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-10-31 22:13:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603664043] [2024-10-31 22:13:18,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:18,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:13:18,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:18,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:13:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272