/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_45_monabsex1_vs_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:58:51,752 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:58:51,838 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:58:51,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:58:51,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:58:51,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:58:51,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:58:51,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:58:51,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:58:51,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:58:51,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:58:51,884 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:58:51,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:58:51,886 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:58:51,886 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:58:51,887 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:58:51,887 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:58:51,887 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:58:51,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:58:51,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:58:51,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:58:51,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:58:51,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:58:51,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:58:51,890 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:58:51,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:58:51,891 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:58:51,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:58:51,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:58:51,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:58:51,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:58:51,893 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:58:51,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:58:51,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:58:51,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:58:51,894 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:58:51,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:58:52,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:58:52,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:58:52,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:58:52,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:58:52,157 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:58:52,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_45_monabsex1_vs_bound2.i [2023-08-03 21:58:53,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:58:53,399 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:58:53,400 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_45_monabsex1_vs_bound2.i [2023-08-03 21:58:53,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/091baba54/55fcefba7f834ed0ae50af51e04d06a2/FLAG213350b50 [2023-08-03 21:58:53,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/091baba54/55fcefba7f834ed0ae50af51e04d06a2 [2023-08-03 21:58:53,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:58:53,439 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:58:53,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:58:53,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:58:53,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:58:53,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e443521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53, skipping insertion in model container [2023-08-03 21:58:53,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,477 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:58:53,619 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-03 21:58:53,709 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_45_monabsex1_vs_bound2.i[30633,30646] [2023-08-03 21:58:53,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:58:53,726 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:58:53,753 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-03 21:58:53,759 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-03 21:58:53,761 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-03 21:58:53,775 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_45_monabsex1_vs_bound2.i[30633,30646] [2023-08-03 21:58:53,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:58:53,799 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:58:53,800 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:58:53,800 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:58:53,805 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:58:53,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53 WrapperNode [2023-08-03 21:58:53,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:58:53,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:58:53,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:58:53,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:58:53,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,840 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2023-08-03 21:58:53,840 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:58:53,841 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:58:53,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:58:53,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:58:53,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,849 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,849 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:58:53,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:58:53,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:58:53,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:58:53,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (1/1) ... [2023-08-03 21:58:53,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:58:53,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:58:53,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 21:58:53,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 21:58:53,936 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 21:58:53,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 21:58:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 21:58:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:58:53,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:58:53,940 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:58:54,070 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:58:54,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:58:54,199 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:58:54,212 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:58:54,212 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 21:58:54,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:58:54 BoogieIcfgContainer [2023-08-03 21:58:54,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:58:54,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:58:54,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:58:54,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:58:54,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:58:53" (1/3) ... [2023-08-03 21:58:54,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd0e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:58:54, skipping insertion in model container [2023-08-03 21:58:54,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:58:53" (2/3) ... [2023-08-03 21:58:54,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddd0e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:58:54, skipping insertion in model container [2023-08-03 21:58:54,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:58:54" (3/3) ... [2023-08-03 21:58:54,221 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_45_monabsex1_vs_bound2.i [2023-08-03 21:58:54,226 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:58:54,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:58:54,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:58:54,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:58:54,264 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:58:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 93 flow [2023-08-03 21:58:54,311 INFO L124 PetriNetUnfolderBase]: 2/54 cut-off events. [2023-08-03 21:58:54,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:58:54,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-03 21:58:54,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 44 transitions, 93 flow [2023-08-03 21:58:54,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 38 transitions, 81 flow [2023-08-03 21:58:54,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:58:54,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 38 transitions, 81 flow [2023-08-03 21:58:54,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 38 transitions, 81 flow [2023-08-03 21:58:54,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 81 flow [2023-08-03 21:58:54,341 INFO L124 PetriNetUnfolderBase]: 0/42 cut-off events. [2023-08-03 21:58:54,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:58:54,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-03 21:58:54,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 220 [2023-08-03 21:58:55,544 INFO L134 LiptonReduction]: Checked pairs total: 174 [2023-08-03 21:58:55,545 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-03 21:58:55,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:58:55,570 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=LoopsAndPotentialCycles, 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;@50374ce9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:58:55,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:58:55,580 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:58:55,580 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-03 21:58:55,580 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:58:55,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:55,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:58:55,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:58:55,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 5811256, now seen corresponding path program 1 times [2023-08-03 21:58:55,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:55,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831003478] [2023-08-03 21:58:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:55,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:58:55,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:58:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:58:55,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:58:55,757 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:58:55,758 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:58:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:58:55,760 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:58:55,764 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:58:55,765 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:58:55,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:58:55,790 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:58:55,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:55,818 INFO L124 PetriNetUnfolderBase]: 3/81 cut-off events. [2023-08-03 21:58:55,818 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:58:55,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 3/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-03 21:58:55,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:55,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 50 transitions, 112 flow [2023-08-03 21:58:55,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:58:55,824 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 50 transitions, 112 flow [2023-08-03 21:58:55,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 50 transitions, 112 flow [2023-08-03 21:58:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 50 transitions, 112 flow [2023-08-03 21:58:55,845 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-03 21:58:55,845 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:58:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 0/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-03 21:58:55,848 INFO L119 LiptonReduction]: Number of co-enabled transitions 704 [2023-08-03 21:58:57,069 INFO L134 LiptonReduction]: Checked pairs total: 828 [2023-08-03 21:58:57,069 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-08-03 21:58:57,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:58:57,072 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=LoopsAndPotentialCycles, 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;@50374ce9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:58:57,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:58:57,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:58:57,075 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-03 21:58:57,075 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:58:57,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:57,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 21:58:57,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:58:57,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash -145825547, now seen corresponding path program 1 times [2023-08-03 21:58:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:57,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993879274] [2023-08-03 21:58:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:58:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:57,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993879274] [2023-08-03 21:58:57,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993879274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:58:57,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143488437] [2023-08-03 21:58:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:57,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:58:57,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:58:57,206 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) [2023-08-03 21:58:57,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:58:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:57,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:58:57,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:58:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:58:57,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:58:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143488437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:57,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:58:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-03 21:58:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366940905] [2023-08-03 21:58:57,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:57,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:58:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:58:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:58:57,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 97 [2023-08-03 21:58:57,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 12 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:57,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:57,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 97 [2023-08-03 21:58:57,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:57,390 INFO L124 PetriNetUnfolderBase]: 15/45 cut-off events. [2023-08-03 21:58:57,390 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 21:58:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 45 events. 15/45 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 109 event pairs, 0 based on Foata normal form. 16/50 useless extension candidates. Maximal degree in co-relation 27. Up to 35 conditions per place. [2023-08-03 21:58:57,391 INFO L140 encePairwiseOnDemand]: 95/97 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-03 21:58:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 14 transitions, 62 flow [2023-08-03 21:58:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:58:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:58:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-08-03 21:58:57,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 21:58:57,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-08-03 21:58:57,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-08-03 21:58:57,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:57,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-08-03 21:58:57,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:57,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:57,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:57,413 INFO L175 Difference]: Start difference. First operand has 17 places, 12 transitions, 36 flow. Second operand 4 states and 194 transitions. [2023-08-03 21:58:57,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 14 transitions, 62 flow [2023-08-03 21:58:57,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 61 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:58:57,416 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-03 21:58:57,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-03 21:58:57,421 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-08-03 21:58:57,421 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-03 21:58:57,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:57,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:58:57,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:58:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:58:57,629 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:58:57,630 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:58:57,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,648 INFO L124 PetriNetUnfolderBase]: 3/81 cut-off events. [2023-08-03 21:58:57,648 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:58:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 3/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-03 21:58:57,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:58:57,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 124 flow [2023-08-03 21:58:57,662 INFO L124 PetriNetUnfolderBase]: 3/81 cut-off events. [2023-08-03 21:58:57,662 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:58:57,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 3/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2023-08-03 21:58:57,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 968 [2023-08-03 21:58:58,664 INFO L134 LiptonReduction]: Checked pairs total: 1204 [2023-08-03 21:58:58,664 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-03 21:58:58,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:58:58,668 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=LoopsAndPotentialCycles, 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;@50374ce9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:58:58,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:58:58,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:58:58,670 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-03 21:58:58,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:58:58,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:58,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:58:58,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:58,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash 325932951, now seen corresponding path program 1 times [2023-08-03 21:58:58,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:58,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448095307] [2023-08-03 21:58:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:58,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:58:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448095307] [2023-08-03 21:58:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448095307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:58,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:58:58,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987737365] [2023-08-03 21:58:58,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:58:58,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:58:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:58:58,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2023-08-03 21:58:58,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:58,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2023-08-03 21:58:58,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:58,822 INFO L124 PetriNetUnfolderBase]: 104/208 cut-off events. [2023-08-03 21:58:58,822 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-03 21:58:58,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 208 events. 104/208 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 867 event pairs, 36 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 359. Up to 104 conditions per place. [2023-08-03 21:58:58,828 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 16 selfloop transitions, 3 changer transitions 1/22 dead transitions. [2023-08-03 21:58:58,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 101 flow [2023-08-03 21:58:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:58:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:58:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-08-03 21:58:58,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2023-08-03 21:58:58,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-08-03 21:58:58,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-08-03 21:58:58,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:58,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-08-03 21:58:58,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,839 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 150 transitions. [2023-08-03 21:58:58,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 101 flow [2023-08-03 21:58:58,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 99 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 21:58:58,842 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 60 flow [2023-08-03 21:58:58,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-03 21:58:58,843 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-03 21:58:58,843 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 60 flow [2023-08-03 21:58:58,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:58,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:58:58,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:58:58,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:58,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1586445031, now seen corresponding path program 1 times [2023-08-03 21:58:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228306169] [2023-08-03 21:58:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:58:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228306169] [2023-08-03 21:58:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228306169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:58,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:58:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966517936] [2023-08-03 21:58:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:58:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:58:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:58:58,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2023-08-03 21:58:58,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:58,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2023-08-03 21:58:58,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:58,934 INFO L124 PetriNetUnfolderBase]: 85/187 cut-off events. [2023-08-03 21:58:58,934 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-08-03 21:58:58,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 187 events. 85/187 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 790 event pairs, 44 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 211. Up to 93 conditions per place. [2023-08-03 21:58:58,936 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 14 selfloop transitions, 3 changer transitions 3/22 dead transitions. [2023-08-03 21:58:58,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 118 flow [2023-08-03 21:58:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:58:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:58:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-08-03 21:58:58,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983164983164983 [2023-08-03 21:58:58,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-08-03 21:58:58,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-08-03 21:58:58,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:58,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-08-03 21:58:58,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,940 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 60 flow. Second operand 3 states and 148 transitions. [2023-08-03 21:58:58,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 118 flow [2023-08-03 21:58:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:58:58,942 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 72 flow [2023-08-03 21:58:58,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-03 21:58:58,943 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2023-08-03 21:58:58,943 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 72 flow [2023-08-03 21:58:58,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:58,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:58,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:58:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:58:58,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:58,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1932818145, now seen corresponding path program 1 times [2023-08-03 21:58:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:58,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641200196] [2023-08-03 21:58:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:58:58,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641200196] [2023-08-03 21:58:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641200196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:58,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:58:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190467043] [2023-08-03 21:58:58,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:58:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:58:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:58:59,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2023-08-03 21:58:59,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:59,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2023-08-03 21:58:59,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:59,062 INFO L124 PetriNetUnfolderBase]: 54/132 cut-off events. [2023-08-03 21:58:59,062 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-03 21:58:59,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 132 events. 54/132 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 515 event pairs, 10 based on Foata normal form. 8/121 useless extension candidates. Maximal degree in co-relation 317. Up to 104 conditions per place. [2023-08-03 21:58:59,066 INFO L140 encePairwiseOnDemand]: 97/99 looper letters, 12 selfloop transitions, 1 changer transitions 5/20 dead transitions. [2023-08-03 21:58:59,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 20 transitions, 121 flow [2023-08-03 21:58:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:58:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:58:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-08-03 21:58:59,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-03 21:58:59,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-08-03 21:58:59,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-08-03 21:58:59,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:59,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-08-03 21:58:59,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,071 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 72 flow. Second operand 3 states and 147 transitions. [2023-08-03 21:58:59,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 20 transitions, 121 flow [2023-08-03 21:58:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 115 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:58:59,073 INFO L231 Difference]: Finished difference. Result has 24 places, 12 transitions, 48 flow [2023-08-03 21:58:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=24, PETRI_TRANSITIONS=12} [2023-08-03 21:58:59,076 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-03 21:58:59,077 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 12 transitions, 48 flow [2023-08-03 21:58:59,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:59,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:58:59,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:58:59,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:59,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1935152456, now seen corresponding path program 1 times [2023-08-03 21:58:59,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:59,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557086159] [2023-08-03 21:58:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:58:59,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557086159] [2023-08-03 21:58:59,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557086159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:59,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:59,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:58:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108751548] [2023-08-03 21:58:59,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:58:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:58:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:58:59,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2023-08-03 21:58:59,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 12 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:59,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2023-08-03 21:58:59,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:59,305 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2023-08-03 21:58:59,305 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-03 21:58:59,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 35 events. 9/35 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs, 0 based on Foata normal form. 8/37 useless extension candidates. Maximal degree in co-relation 75. Up to 21 conditions per place. [2023-08-03 21:58:59,306 INFO L140 encePairwiseOnDemand]: 97/99 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-03 21:58:59,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 14 transitions, 74 flow [2023-08-03 21:58:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:58:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:58:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-08-03 21:58:59,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2023-08-03 21:58:59,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-08-03 21:58:59,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-08-03 21:58:59,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:59,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-08-03 21:58:59,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,309 INFO L175 Difference]: Start difference. First operand has 24 places, 12 transitions, 48 flow. Second operand 3 states and 142 transitions. [2023-08-03 21:58:59,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 14 transitions, 74 flow [2023-08-03 21:58:59,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 14 transitions, 63 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-03 21:58:59,310 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-03 21:58:59,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-03 21:58:59,310 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 0 predicate places. [2023-08-03 21:58:59,311 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-03 21:58:59,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:59,311 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:58:59,311 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:58:59,311 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 21:58:59,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:58:59,312 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 21:58:59,312 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 21:58:59,314 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:58:59,314 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:58:59,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:58:59 BasicIcfg [2023-08-03 21:58:59,319 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:58:59,320 INFO L158 Benchmark]: Toolchain (without parser) took 5880.42ms. Allocated memory is still 534.8MB. Free memory was 481.0MB in the beginning and 489.8MB in the end (delta: -8.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:58:59,320 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 301.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:58:59,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.57ms. Allocated memory is still 534.8MB. Free memory was 480.6MB in the beginning and 461.3MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:58:59,320 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.49ms. Allocated memory is still 534.8MB. Free memory was 461.3MB in the beginning and 459.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:58:59,321 INFO L158 Benchmark]: Boogie Preprocessor took 18.61ms. Allocated memory is still 534.8MB. Free memory was 459.6MB in the beginning and 458.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:58:59,321 INFO L158 Benchmark]: RCFGBuilder took 354.17ms. Allocated memory is still 534.8MB. Free memory was 458.0MB in the beginning and 446.7MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-03 21:58:59,321 INFO L158 Benchmark]: TraceAbstraction took 5103.28ms. Allocated memory is still 534.8MB. Free memory was 445.9MB in the beginning and 489.8MB in the end (delta: -43.9MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:58:59,322 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 301.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 364.57ms. Allocated memory is still 534.8MB. Free memory was 480.6MB in the beginning and 461.3MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.49ms. Allocated memory is still 534.8MB. Free memory was 461.3MB in the beginning and 459.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.61ms. Allocated memory is still 534.8MB. Free memory was 459.6MB in the beginning and 458.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 354.17ms. Allocated memory is still 534.8MB. Free memory was 458.0MB in the beginning and 446.7MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 5103.28ms. Allocated memory is still 534.8MB. Free memory was 445.9MB in the beginning and 489.8MB in the end (delta: -43.9MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 266]: Unsoundness Warning unspecified type, defaulting to int C: short [266] - GenericResultAtLocation [Line: 266]: Unsoundness Warning unspecified type, defaulting to int C: short [266] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 41 PlacesBefore, 9 PlacesAfterwards, 38 TransitionsBefore, 6 TransitionsAfterwards, 220 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 39 TotalNumberOfCompositions, 174 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 174, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 116, independent: 116, independent conditional: 0, independent unconditional: 116, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 174, independent: 58, independent conditional: 0, independent unconditional: 58, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 116, unknown conditional: 0, unknown unconditional: 116] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 55 PlacesBefore, 17 PlacesAfterwards, 50 TransitionsBefore, 12 TransitionsAfterwards, 704 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 41 TotalNumberOfCompositions, 828 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 659, independent: 621, independent conditional: 0, independent unconditional: 621, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 368, independent: 352, independent conditional: 0, independent unconditional: 352, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 659, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 368, unknown conditional: 0, unknown unconditional: 368] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0s, 60 PlacesBefore, 19 PlacesAfterwards, 56 TransitionsBefore, 14 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 43 TotalNumberOfCompositions, 1204 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 961, independent: 919, independent conditional: 0, independent unconditional: 919, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 502, independent: 487, independent conditional: 0, independent unconditional: 487, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 961, independent: 432, independent conditional: 0, independent unconditional: 432, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 502, unknown conditional: 0, unknown unconditional: 502] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 710]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 56 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 68 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 28 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 68 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 66 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 155 IncrementalHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 6 mSDtfsCounter, 155 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 44 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 21:58:59,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...