./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu --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 fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:09,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:09,543 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:42:09,549 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:09,549 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:09,574 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:09,575 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:09,576 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:09,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:09,577 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:09,578 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:09,579 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:09,579 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:09,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:09,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:09,581 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:09,582 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:09,582 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:09,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:09,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:09,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:09,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:09,585 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:09,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:09,587 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:09,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:09,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:09,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:09,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:09,589 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:09,590 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:09,590 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:09,591 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:09,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:09,592 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:09,592 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:09,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:09,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:09,593 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:09,594 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_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf [2023-11-19 07:42:09,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:09,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:09,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:09,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:09,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:09,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-11-19 07:42:12,919 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:13,291 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:13,292 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-11-19 07:42:13,315 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/data/3f3b7edc1/ede7cadddfde4608b76e280fa67fc9f2/FLAG95d6395d8 [2023-11-19 07:42:13,333 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/data/3f3b7edc1/ede7cadddfde4608b76e280fa67fc9f2 [2023-11-19 07:42:13,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:13,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:13,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:13,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:13,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:13,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:13" (1/1) ... [2023-11-19 07:42:13,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f98339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:13, skipping insertion in model container [2023-11-19 07:42:13,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:13" (1/1) ... [2023-11-19 07:42:13,423 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:13,870 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-11-19 07:42:13,876 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-11-19 07:42:13,882 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-11-19 07:42:13,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:13,900 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:13,952 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-11-19 07:42:13,953 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-11-19 07:42:13,954 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_fa2c98ac-2854-436f-a660-f6613f74295b/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-11-19 07:42:13,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:14,001 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:14,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14 WrapperNode [2023-11-19 07:42:14,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:14,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:14,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:14,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:14,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,059 INFO L138 Inliner]: procedures = 139, calls = 56, calls flagged for inlining = 15, calls inlined = 14, statements flattened = 137 [2023-11-19 07:42:14,061 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:14,062 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:14,062 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:14,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:14,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:14,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:14,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:14,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:14,104 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (1/1) ... [2023-11-19 07:42:14,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:14,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-19 07:42:14,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-19 07:42:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:42:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-19 07:42:14,194 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-19 07:42:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:14,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:42:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-19 07:42:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-19 07:42:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:42:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 07:42:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-19 07:42:14,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-19 07:42:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:14,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:14,405 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:14,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:14,780 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:14,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:14,799 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:42:14,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:14 BoogieIcfgContainer [2023-11-19 07:42:14,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:14,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:14,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:14,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:14,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:13" (1/3) ... [2023-11-19 07:42:14,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5878ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:14, skipping insertion in model container [2023-11-19 07:42:14,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:14" (2/3) ... [2023-11-19 07:42:14,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5878ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:14, skipping insertion in model container [2023-11-19 07:42:14,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:14" (3/3) ... [2023-11-19 07:42:14,832 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2023-11-19 07:42:14,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:14,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-19 07:42:14,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:14,933 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;@6fb94468, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:14,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:42:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:42:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:42:14,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:14,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:14,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:14,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1577806477, now seen corresponding path program 1 times [2023-11-19 07:42:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:14,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438734803] [2023-11-19 07:42:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:14,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:42:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:42:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:42:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:42:15,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438734803] [2023-11-19 07:42:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438734803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:15,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113685822] [2023-11-19 07:42:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:15,347 INFO L87 Difference]: Start difference. First operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:42:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:15,510 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2023-11-19 07:42:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-19 07:42:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:15,522 INFO L225 Difference]: With dead ends: 131 [2023-11-19 07:42:15,522 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:42:15,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:15,530 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:15,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:42:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-11-19 07:42:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:42:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-19 07:42:15,581 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 28 [2023-11-19 07:42:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:15,581 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-19 07:42:15,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:42:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-19 07:42:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:42:15,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:15,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:15,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:15,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:15,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -109345869, now seen corresponding path program 1 times [2023-11-19 07:42:15,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:15,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212047453] [2023-11-19 07:42:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:42:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:42:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:42:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:42:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:15,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212047453] [2023-11-19 07:42:15,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212047453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:15,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:15,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:42:15,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203714813] [2023-11-19 07:42:15,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:15,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:15,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:15,907 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:42:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:16,086 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-11-19 07:42:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-19 07:42:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:16,089 INFO L225 Difference]: With dead ends: 70 [2023-11-19 07:42:16,089 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 07:42:16,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:16,092 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:16,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 192 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 07:42:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2023-11-19 07:42:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-19 07:42:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-11-19 07:42:16,116 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 28 [2023-11-19 07:42:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:16,117 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-11-19 07:42:16,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:42:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-11-19 07:42:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:42:16,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:16,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:42:16,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:16,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1465257436, now seen corresponding path program 1 times [2023-11-19 07:42:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460152621] [2023-11-19 07:42:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:42:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:42:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:42:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:42:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460152621] [2023-11-19 07:42:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460152621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:16,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893538081] [2023-11-19 07:42:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:16,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:16,752 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:42:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:17,376 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2023-11-19 07:42:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:42:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-19 07:42:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:17,379 INFO L225 Difference]: With dead ends: 186 [2023-11-19 07:42:17,380 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 07:42:17,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:42:17,382 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 126 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:17,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 241 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:42:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 07:42:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2023-11-19 07:42:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 77 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-11-19 07:42:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-11-19 07:42:17,405 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 28 [2023-11-19 07:42:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:17,406 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-11-19 07:42:17,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:42:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-11-19 07:42:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:42:17,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:17,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:17,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:42:17,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:17,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1566335676, now seen corresponding path program 1 times [2023-11-19 07:42:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223330963] [2023-11-19 07:42:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:42:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:20,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:42:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:42:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-19 07:42:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-19 07:42:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-19 07:42:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-19 07:42:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-19 07:42:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:42:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223330963] [2023-11-19 07:42:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223330963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694789498] [2023-11-19 07:42:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:23,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:23,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2c98ac-2854-436f-a660-f6613f74295b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:23,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 147 conjunts are in the unsatisfiable core [2023-11-19 07:42:23,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:23,767 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-19 07:42:23,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-19 07:42:24,218 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:42:24,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:42:25,487 INFO L349 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-11-19 07:42:25,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 236 [2023-11-19 07:42:25,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-19 07:42:25,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-19 07:42:25,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-19 07:42:25,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:42:25,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:42:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:42:26,763 INFO L349 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2023-11-19 07:42:26,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 524 treesize of output 506 [2023-11-19 07:42:26,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 164 treesize of output 162 [2023-11-19 07:42:26,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-11-19 07:42:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver