./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:31:17,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:31:17,678 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:31:17,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:31:17,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:31:17,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:31:17,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:31:17,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:31:17,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:31:17,717 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:31:17,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:31:17,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:31:17,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:31:17,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:31:17,727 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:31:17,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:31:17,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:31:17,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:31:17,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:31:17,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:31:17,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:31:17,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:31:17,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:31:17,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:31:17,729 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:31:17,730 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:31:17,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:31:17,730 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:31:17,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:31:17,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:31:17,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:31:17,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:31:17,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:31:17,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:31:17,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:31:17,733 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:31:17,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:31:17,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:31:17,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:31:17,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:31:17,734 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:31:17,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:31:17,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:31:17,734 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2024-06-27 17:31:17,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:31:17,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:31:17,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:31:17,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:31:17,984 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:31:17,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2024-06-27 17:31:19,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:31:19,290 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:31:19,291 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2024-06-27 17:31:19,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed41a8992/8bd71d19ff884355862a2203c42a0356/FLAG8e1271e1c [2024-06-27 17:31:19,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed41a8992/8bd71d19ff884355862a2203c42a0356 [2024-06-27 17:31:19,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:31:19,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:31:19,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:31:19,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:31:19,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:31:19,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec4fe62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19, skipping insertion in model container [2024-06-27 17:31:19,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:31:19,649 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2024-06-27 17:31:19,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:31:19,697 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:31:19,739 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2024-06-27 17:31:19,750 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:31:19,792 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:31:19,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19 WrapperNode [2024-06-27 17:31:19,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:31:19,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:31:19,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:31:19,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:31:19,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,829 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2024-06-27 17:31:19,832 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:31:19,833 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:31:19,833 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:31:19,833 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:31:19,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,844 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,855 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 5, 10, 2]. 53 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-06-27 17:31:19,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,856 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:31:19,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:31:19,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:31:19,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:31:19,870 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (1/1) ... [2024-06-27 17:31:19,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:31:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:19,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:31:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:31:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:31:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:31:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:31:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:31:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 17:31:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-27 17:31:19,955 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-27 17:31:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 17:31:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:31:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:31:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:31:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 17:31:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:31:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:31:19,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:31:19,958 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:31:20,065 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:31:20,067 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:31:20,350 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:31:20,350 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:31:20,593 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:31:20,593 INFO L320 CfgBuilder]: Removed 10 assume(true) statements. [2024-06-27 17:31:20,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:31:20 BoogieIcfgContainer [2024-06-27 17:31:20,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:31:20,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:31:20,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:31:20,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:31:20,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:31:19" (1/3) ... [2024-06-27 17:31:20,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc7dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:31:20, skipping insertion in model container [2024-06-27 17:31:20,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:19" (2/3) ... [2024-06-27 17:31:20,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc7dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:31:20, skipping insertion in model container [2024-06-27 17:31:20,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:31:20" (3/3) ... [2024-06-27 17:31:20,601 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2024-06-27 17:31:20,608 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:31:20,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:31:20,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:31:20,616 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:31:20,654 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 17:31:20,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2024-06-27 17:31:20,733 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2024-06-27 17:31:20,734 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 17:31:20,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2024-06-27 17:31:20,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2024-06-27 17:31:20,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2024-06-27 17:31:20,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:20,762 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;@6e81c8a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:20,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-27 17:31:20,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:20,769 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-06-27 17:31:20,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:31:20,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:20,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 17:31:20,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:20,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1943694926, now seen corresponding path program 1 times [2024-06-27 17:31:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:20,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694284532] [2024-06-27 17:31:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:20,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:31:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:20,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:31:20,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:31:20,999 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-06-27 17:31:21,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-06-27 17:31:21,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:31:21,002 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:31:21,007 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:31:21,007 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 17:31:21,026 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:31:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2024-06-27 17:31:21,060 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2024-06-27 17:31:21,061 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 17:31:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 472 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2024-06-27 17:31:21,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2024-06-27 17:31:21,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2024-06-27 17:31:21,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:21,067 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;@6e81c8a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:21,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-27 17:31:21,077 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:21,078 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-06-27 17:31:21,078 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:31:21,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:21,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:21,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:21,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1944964601, now seen corresponding path program 1 times [2024-06-27 17:31:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503173831] [2024-06-27 17:31:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:21,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503173831] [2024-06-27 17:31:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503173831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:31:21,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:31:21,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:31:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834232005] [2024-06-27 17:31:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:31:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:31:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:21,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:31:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:31:21,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-06-27 17:31:21,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:21,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:21,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-06-27 17:31:21,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:21,819 INFO L124 PetriNetUnfolderBase]: 2414/4780 cut-off events. [2024-06-27 17:31:21,819 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-27 17:31:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8738 conditions, 4780 events. 2414/4780 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 33934 event pairs, 2394 based on Foata normal form. 1265/5682 useless extension candidates. Maximal degree in co-relation 6402. Up to 3889 conditions per place. [2024-06-27 17:31:21,842 INFO L140 encePairwiseOnDemand]: 56/74 looper letters, 36 selfloop transitions, 2 changer transitions 11/70 dead transitions. [2024-06-27 17:31:21,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 250 flow [2024-06-27 17:31:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:31:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:31:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-06-27 17:31:21,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-27 17:31:21,856 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 164 flow. Second operand 3 states and 138 transitions. [2024-06-27 17:31:21,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 250 flow [2024-06-27 17:31:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:31:21,864 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 118 flow [2024-06-27 17:31:21,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-06-27 17:31:21,869 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-06-27 17:31:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 118 flow [2024-06-27 17:31:21,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:21,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:21,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 17:31:21,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:31:21,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:21,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1756495781, now seen corresponding path program 1 times [2024-06-27 17:31:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:21,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093806394] [2024-06-27 17:31:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:21,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:31:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:21,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:31:21,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:31:21,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-06-27 17:31:21,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-06-27 17:31:21,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:31:21,944 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 17:31:21,945 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:31:21,945 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 17:31:21,961 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:31:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2024-06-27 17:31:21,974 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2024-06-27 17:31:21,975 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:31:21,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 789 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2024-06-27 17:31:21,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2024-06-27 17:31:21,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2024-06-27 17:31:21,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:21,979 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;@6e81c8a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:21,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-27 17:31:21,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:21,982 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-06-27 17:31:21,982 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:31:21,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:21,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:21,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:21,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash -608119929, now seen corresponding path program 1 times [2024-06-27 17:31:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331801834] [2024-06-27 17:31:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:22,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331801834] [2024-06-27 17:31:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331801834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:31:22,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:31:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:31:22,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994649649] [2024-06-27 17:31:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:31:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:31:22,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:31:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:31:22,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 99 [2024-06-27 17:31:22,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-06-27 17:31:22,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:22,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 99 [2024-06-27 17:31:22,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:26,760 INFO L124 PetriNetUnfolderBase]: 38401/62918 cut-off events. [2024-06-27 17:31:26,761 INFO L125 PetriNetUnfolderBase]: For 1137/1137 co-relation queries the response was YES. [2024-06-27 17:31:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117545 conditions, 62918 events. 38401/62918 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 539101 event pairs, 36768 based on Foata normal form. 19074/78040 useless extension candidates. Maximal degree in co-relation 68573. Up to 53816 conditions per place. [2024-06-27 17:31:27,120 INFO L140 encePairwiseOnDemand]: 75/99 looper letters, 46 selfloop transitions, 2 changer transitions 12/89 dead transitions. [2024-06-27 17:31:27,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 321 flow [2024-06-27 17:31:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:31:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:31:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-06-27 17:31:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6026936026936027 [2024-06-27 17:31:27,128 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 225 flow. Second operand 3 states and 179 transitions. [2024-06-27 17:31:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 321 flow [2024-06-27 17:31:27,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:31:27,137 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 162 flow [2024-06-27 17:31:27,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-06-27 17:31:27,138 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-06-27 17:31:27,138 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 162 flow [2024-06-27 17:31:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-06-27 17:31:27,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:27,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:27,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:31:27,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:27,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1319546823, now seen corresponding path program 1 times [2024-06-27 17:31:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635828940] [2024-06-27 17:31:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:27,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:27,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635828940] [2024-06-27 17:31:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635828940] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:31:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966702885] [2024-06-27 17:31:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:27,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:31:27,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:31:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:27,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 17:31:27,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:31:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:27,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:31:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:27,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966702885] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:31:27,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:31:27,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 17:31:27,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688448684] [2024-06-27 17:31:27,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:31:27,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:31:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:31:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:31:27,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 99 [2024-06-27 17:31:27,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 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) [2024-06-27 17:31:27,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:27,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 99 [2024-06-27 17:31:27,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:28,153 INFO L124 PetriNetUnfolderBase]: 7668/13448 cut-off events. [2024-06-27 17:31:28,154 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2024-06-27 17:31:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26008 conditions, 13448 events. 7668/13448 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 101611 event pairs, 1890 based on Foata normal form. 1110/14454 useless extension candidates. Maximal degree in co-relation 2662. Up to 7400 conditions per place. [2024-06-27 17:31:28,215 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-06-27 17:31:28,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2024-06-27 17:31:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:31:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:31:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2024-06-27 17:31:28,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730639730639731 [2024-06-27 17:31:28,218 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 162 flow. Second operand 6 states and 281 transitions. [2024-06-27 17:31:28,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2024-06-27 17:31:28,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:31:28,223 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-06-27 17:31:28,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-06-27 17:31:28,225 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2024-06-27 17:31:28,225 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-06-27 17:31:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 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) [2024-06-27 17:31:28,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:28,226 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 17:31:28,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:31:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:28,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:28,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -504422611, now seen corresponding path program 1 times [2024-06-27 17:31:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474441083] [2024-06-27 17:31:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:28,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:31:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:28,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:31:28,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:31:28,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-06-27 17:31:28,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-06-27 17:31:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:31:28,481 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-06-27 17:31:28,481 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:31:28,481 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 17:31:28,539 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 17:31:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2024-06-27 17:31:28,561 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2024-06-27 17:31:28,561 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-27 17:31:28,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1211 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2024-06-27 17:31:28,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2024-06-27 17:31:28,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2024-06-27 17:31:28,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:28,567 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;@6e81c8a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:28,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-27 17:31:28,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:28,570 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-06-27 17:31:28,571 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:31:28,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:28,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:28,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:31:28,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1493315193, now seen corresponding path program 1 times [2024-06-27 17:31:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111479541] [2024-06-27 17:31:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:31:28,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:28,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111479541] [2024-06-27 17:31:28,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111479541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:31:28,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:31:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:31:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297924167] [2024-06-27 17:31:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:31:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:31:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:31:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:31:28,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 124 [2024-06-27 17:31:28,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-06-27 17:31:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:28,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 124 [2024-06-27 17:31:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand