/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-horseshoe.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:13:55,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:13:55,946 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:13:55,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:13:55,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:13:55,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:13:55,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:13:55,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:13:55,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:13:55,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:13:55,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:13:55,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:13:55,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:13:55,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:13:55,970 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:13:55,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:13:55,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:13:55,971 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:13:55,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:13:55,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:13:55,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:13:55,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:13:55,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:13:55,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:13:55,979 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:13:55,980 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:13:55,980 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:13:55,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:13:55,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:13:55,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:13:55,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:13:55,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:13:55,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:13:55,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:13:55,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:13:55,983 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:13:55,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:13:56,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:13:56,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:13:56,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:13:56,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:13:56,225 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:13:56,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-horseshoe.wvr_bound2.c [2023-08-04 09:13:57,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:13:57,567 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:13:57,568 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-horseshoe.wvr_bound2.c [2023-08-04 09:13:57,575 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba9e20a6/330f5fa9d08b4d3bbc8f33846fa616e3/FLAG9f7bf3ee0 [2023-08-04 09:13:57,586 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba9e20a6/330f5fa9d08b4d3bbc8f33846fa616e3 [2023-08-04 09:13:57,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:13:57,589 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:13:57,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:13:57,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:13:57,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:13:57,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152920f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57, skipping insertion in model container [2023-08-04 09:13:57,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,637 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:13:57,778 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-horseshoe.wvr_bound2.c[3667,3680] [2023-08-04 09:13:57,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:13:57,791 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:13:57,819 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-horseshoe.wvr_bound2.c[3667,3680] [2023-08-04 09:13:57,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:13:57,835 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:13:57,835 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:13:57,841 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:13:57,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57 WrapperNode [2023-08-04 09:13:57,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:13:57,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:13:57,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:13:57,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:13:57,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,858 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,884 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 300 [2023-08-04 09:13:57,885 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:13:57,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:13:57,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:13:57,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:13:57,893 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,913 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:13:57,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:13:57,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:13:57,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:13:57,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (1/1) ... [2023-08-04 09:13:57,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:13:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:13:57,974 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) [2023-08-04 09:13:58,002 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 [2023-08-04 09:13:58,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:13:58,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:13:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:13:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:13:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:13:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:13:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:13:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:13:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:13:58,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:13:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:13:58,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:13:58,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:13:58,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:13:58,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:13:58,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:13:58,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:13:58,023 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:13:58,152 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:13:58,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:13:58,550 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:13:58,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:13:58,662 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:13:58,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:13:58 BoogieIcfgContainer [2023-08-04 09:13:58,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:13:58,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:13:58,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:13:58,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:13:58,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:13:57" (1/3) ... [2023-08-04 09:13:58,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d90495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:13:58, skipping insertion in model container [2023-08-04 09:13:58,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:13:57" (2/3) ... [2023-08-04 09:13:58,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d90495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:13:58, skipping insertion in model container [2023-08-04 09:13:58,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:13:58" (3/3) ... [2023-08-04 09:13:58,672 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-horseshoe.wvr_bound2.c [2023-08-04 09:13:58,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:13:58,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:13:58,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:13:58,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:13:58,743 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:13:58,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:58,929 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:13:58,930 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:13:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3261 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:13:58,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:58,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:58,961 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:13:58,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:58,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:58,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:13:59,091 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:13:59,091 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:13:59,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3261 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:13:59,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 5638 [2023-08-04 09:14:05,719 INFO L134 LiptonReduction]: Checked pairs total: 12408 [2023-08-04 09:14:05,719 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-04 09:14:05,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:14:05,737 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;@7d4ee9c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:05,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:14:05,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:05,743 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2023-08-04 09:14:05,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:14:05,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:05,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:05,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:05,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160298, now seen corresponding path program 1 times [2023-08-04 09:14:05,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:05,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576183954] [2023-08-04 09:14:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:05,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:14:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576183954] [2023-08-04 09:14:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576183954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:14:06,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:14:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111542827] [2023-08-04 09:14:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:06,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:06,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:14:06,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:06,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-08-04 09:14:06,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:06,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:06,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:06,777 INFO L124 PetriNetUnfolderBase]: 3537/5060 cut-off events. [2023-08-04 09:14:06,778 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-08-04 09:14:06,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10216 conditions, 5060 events. 3537/5060 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25372 event pairs, 2199 based on Foata normal form. 0/3418 useless extension candidates. Maximal degree in co-relation 8232. Up to 4856 conditions per place. [2023-08-04 09:14:06,806 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 44 selfloop transitions, 2 changer transitions 4/56 dead transitions. [2023-08-04 09:14:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 248 flow [2023-08-04 09:14:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-04 09:14:06,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697286012526096 [2023-08-04 09:14:06,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-04 09:14:06,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-04 09:14:06,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:06,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-04 09:14:06,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2023-08-04 09:14:06,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:06,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:06,837 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 154 flow. Second operand 3 states and 675 transitions. [2023-08-04 09:14:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 248 flow [2023-08-04 09:14:06,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:14:06,847 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 144 flow [2023-08-04 09:14:06,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-04 09:14:06,851 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 09:14:06,851 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 144 flow [2023-08-04 09:14:06,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-08-04 09:14:06,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:06,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:06,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:14:06,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:06,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 826028327, now seen corresponding path program 1 times [2023-08-04 09:14:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:06,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525850531] [2023-08-04 09:14:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:06,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:14:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525850531] [2023-08-04 09:14:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525850531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231171195] [2023-08-04 09:14:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:06,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:06,977 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) [2023-08-04 09:14:06,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:14:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:07,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:07,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:14:07,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231171195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:07,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486874863] [2023-08-04 09:14:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:07,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:07,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:07,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:07,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2023-08-04 09:14:07,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:07,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:07,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:07,609 INFO L124 PetriNetUnfolderBase]: 3433/4897 cut-off events. [2023-08-04 09:14:07,610 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 09:14:07,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 4897 events. 3433/4897 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24443 event pairs, 2132 based on Foata normal form. 0/3317 useless extension candidates. Maximal degree in co-relation 7893. Up to 4670 conditions per place. [2023-08-04 09:14:07,638 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 48 selfloop transitions, 2 changer transitions 1/57 dead transitions. [2023-08-04 09:14:07,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 260 flow [2023-08-04 09:14:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-04 09:14:07,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4704244954766875 [2023-08-04 09:14:07,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-04 09:14:07,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-04 09:14:07,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:07,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-04 09:14:07,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2023-08-04 09:14:07,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:07,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:07,649 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 144 flow. Second operand 3 states and 676 transitions. [2023-08-04 09:14:07,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 260 flow [2023-08-04 09:14:07,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 244 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:14:07,654 INFO L231 Difference]: Finished difference. Result has 44 places, 50 transitions, 136 flow [2023-08-04 09:14:07,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=50} [2023-08-04 09:14:07,655 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-04 09:14:07,655 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 50 transitions, 136 flow [2023-08-04 09:14:07,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2023-08-04 09:14:07,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:07,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:07,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:14:07,861 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 [2023-08-04 09:14:07,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:07,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1189138517, now seen corresponding path program 1 times [2023-08-04 09:14:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145952154] [2023-08-04 09:14:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:14:07,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145952154] [2023-08-04 09:14:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145952154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704012619] [2023-08-04 09:14:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:07,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:07,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:14:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:08,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:08,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:14:08,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704012619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611697464] [2023-08-04 09:14:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:08,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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) [2023-08-04 09:14:08,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:08,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:08,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:08,471 INFO L124 PetriNetUnfolderBase]: 3401/4875 cut-off events. [2023-08-04 09:14:08,471 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 09:14:08,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9847 conditions, 4875 events. 3401/4875 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24333 event pairs, 1592 based on Foata normal form. 0/3351 useless extension candidates. Maximal degree in co-relation 6057. Up to 4412 conditions per place. [2023-08-04 09:14:08,509 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 51 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-04 09:14:08,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 264 flow [2023-08-04 09:14:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-08-04 09:14:08,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725121781489214 [2023-08-04 09:14:08,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-08-04 09:14:08,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-08-04 09:14:08,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:08,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-08-04 09:14:08,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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) [2023-08-04 09:14:08,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:08,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:08,520 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 136 flow. Second operand 3 states and 679 transitions. [2023-08-04 09:14:08,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 264 flow [2023-08-04 09:14:08,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:14:08,522 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 140 flow [2023-08-04 09:14:08,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-08-04 09:14:08,523 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-08-04 09:14:08,524 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 140 flow [2023-08-04 09:14:08,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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) [2023-08-04 09:14:08,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:08,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:08,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:14:08,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:08,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2124038079, now seen corresponding path program 1 times [2023-08-04 09:14:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:08,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542770886] [2023-08-04 09:14:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:08,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:14:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542770886] [2023-08-04 09:14:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542770886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182743437] [2023-08-04 09:14:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:08,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:08,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:08,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:14:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:08,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:08,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:14:08,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182743437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:08,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:08,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156388905] [2023-08-04 09:14:08,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:08,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:08,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:08,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-08-04 09:14:08,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:08,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:08,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:09,265 INFO L124 PetriNetUnfolderBase]: 2118/3104 cut-off events. [2023-08-04 09:14:09,265 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 09:14:09,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6474 conditions, 3104 events. 2118/3104 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 14338 event pairs, 1008 based on Foata normal form. 0/2211 useless extension candidates. Maximal degree in co-relation 3767. Up to 2336 conditions per place. [2023-08-04 09:14:09,282 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:14:09,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 290 flow [2023-08-04 09:14:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-04 09:14:09,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47529575504523314 [2023-08-04 09:14:09,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-04 09:14:09,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-04 09:14:09,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:09,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-04 09:14:09,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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) [2023-08-04 09:14:09,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:09,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:09,294 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 140 flow. Second operand 3 states and 683 transitions. [2023-08-04 09:14:09,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 290 flow [2023-08-04 09:14:09,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:14:09,297 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 148 flow [2023-08-04 09:14:09,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2023-08-04 09:14:09,298 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-04 09:14:09,298 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 148 flow [2023-08-04 09:14:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-08-04 09:14:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:09,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:09,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:09,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash 56029398, now seen corresponding path program 1 times [2023-08-04 09:14:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279257842] [2023-08-04 09:14:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:14:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279257842] [2023-08-04 09:14:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279257842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367331313] [2023-08-04 09:14:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:09,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:09,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:09,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:14:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:09,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:09,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:14:09,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367331313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:09,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281209750] [2023-08-04 09:14:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:09,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:09,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2023-08-04 09:14:09,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:09,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:09,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:10,006 INFO L124 PetriNetUnfolderBase]: 1788/2637 cut-off events. [2023-08-04 09:14:10,007 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2023-08-04 09:14:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5692 conditions, 2637 events. 1788/2637 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11720 event pairs, 989 based on Foata normal form. 0/1984 useless extension candidates. Maximal degree in co-relation 3383. Up to 2158 conditions per place. [2023-08-04 09:14:10,023 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 09:14:10,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 300 flow [2023-08-04 09:14:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-04 09:14:10,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47529575504523314 [2023-08-04 09:14:10,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-04 09:14:10,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-04 09:14:10,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:10,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-04 09:14:10,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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) [2023-08-04 09:14:10,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:10,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:10,031 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 148 flow. Second operand 3 states and 683 transitions. [2023-08-04 09:14:10,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 300 flow [2023-08-04 09:14:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:14:10,036 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 158 flow [2023-08-04 09:14:10,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-08-04 09:14:10,038 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-04 09:14:10,039 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 158 flow [2023-08-04 09:14:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 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) [2023-08-04 09:14:10,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:10,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:10,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:10,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:10,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1071086435, now seen corresponding path program 1 times [2023-08-04 09:14:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:10,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412897168] [2023-08-04 09:14:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:14:10,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:10,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412897168] [2023-08-04 09:14:10,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412897168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:10,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762369255] [2023-08-04 09:14:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:10,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:10,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:10,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:14:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:10,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:10,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:14:10,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762369255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:10,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:14:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296697321] [2023-08-04 09:14:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:10,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:10,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 479 [2023-08-04 09:14:10,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2023-08-04 09:14:10,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:10,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 479 [2023-08-04 09:14:10,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:10,713 INFO L124 PetriNetUnfolderBase]: 1774/2613 cut-off events. [2023-08-04 09:14:10,713 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2023-08-04 09:14:10,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5698 conditions, 2613 events. 1774/2613 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11508 event pairs, 1130 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 4467. Up to 2471 conditions per place. [2023-08-04 09:14:10,725 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 51 selfloop transitions, 2 changer transitions 3/62 dead transitions. [2023-08-04 09:14:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 290 flow [2023-08-04 09:14:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-08-04 09:14:10,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725121781489214 [2023-08-04 09:14:10,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-08-04 09:14:10,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-08-04 09:14:10,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:10,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-08-04 09:14:10,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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) [2023-08-04 09:14:10,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:10,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-04 09:14:10,734 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 158 flow. Second operand 3 states and 679 transitions. [2023-08-04 09:14:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 290 flow [2023-08-04 09:14:10,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:14:10,738 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 156 flow [2023-08-04 09:14:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-04 09:14:10,739 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-04 09:14:10,739 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 156 flow [2023-08-04 09:14:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2023-08-04 09:14:10,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:10,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:10,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:10,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:10,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:10,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1305353305, now seen corresponding path program 1 times [2023-08-04 09:14:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452074843] [2023-08-04 09:14:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:14:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452074843] [2023-08-04 09:14:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452074843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241685752] [2023-08-04 09:14:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:11,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:11,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:11,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:11,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:14:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:11,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:14:11,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:14:11,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241685752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:11,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:14:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733206067] [2023-08-04 09:14:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:14:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:14:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:14:11,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 479 [2023-08-04 09:14:11,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 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) [2023-08-04 09:14:11,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:11,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 479 [2023-08-04 09:14:11,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:11,564 INFO L124 PetriNetUnfolderBase]: 1733/2595 cut-off events. [2023-08-04 09:14:11,564 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-08-04 09:14:11,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 2595 events. 1733/2595 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11585 event pairs, 1122 based on Foata normal form. 124/2123 useless extension candidates. Maximal degree in co-relation 5488. Up to 2388 conditions per place. [2023-08-04 09:14:11,575 INFO L140 encePairwiseOnDemand]: 472/479 looper letters, 43 selfloop transitions, 2 changer transitions 45/96 dead transitions. [2023-08-04 09:14:11,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 484 flow [2023-08-04 09:14:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:14:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:14:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1106 transitions. [2023-08-04 09:14:11,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179540709812106 [2023-08-04 09:14:11,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1106 transitions. [2023-08-04 09:14:11,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1106 transitions. [2023-08-04 09:14:11,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:11,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1106 transitions. [2023-08-04 09:14:11,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.2) internal successors, (1106), 5 states have internal predecessors, (1106), 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) [2023-08-04 09:14:11,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 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) [2023-08-04 09:14:11,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 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) [2023-08-04 09:14:11,585 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 156 flow. Second operand 5 states and 1106 transitions. [2023-08-04 09:14:11,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 484 flow [2023-08-04 09:14:11,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 96 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:14:11,590 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 178 flow [2023-08-04 09:14:11,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-04 09:14:11,591 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-08-04 09:14:11,591 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 178 flow [2023-08-04 09:14:11,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 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) [2023-08-04 09:14:11,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:11,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:11,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:11,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:11,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:11,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 987157311, now seen corresponding path program 1 times [2023-08-04 09:14:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068469839] [2023-08-04 09:14:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:14:11,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068469839] [2023-08-04 09:14:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068469839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976640568] [2023-08-04 09:14:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:11,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:11,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:14:11,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:14:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:11,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:14:11,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:14:12,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:14:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:14:12,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976640568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:14:12,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:14:12,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:14:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712949226] [2023-08-04 09:14:12,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:14:12,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:14:12,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:14:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:12,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 479 [2023-08-04 09:14:12,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 214.8) internal successors, (1074), 5 states have internal predecessors, (1074), 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) [2023-08-04 09:14:12,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:12,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 479 [2023-08-04 09:14:12,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:12,080 INFO L124 PetriNetUnfolderBase]: 10/24 cut-off events. [2023-08-04 09:14:12,081 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 09:14:12,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 24 events. 10/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 30 event pairs, 1 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 76. Up to 13 conditions per place. [2023-08-04 09:14:12,081 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:14:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 15 transitions, 90 flow [2023-08-04 09:14:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:14:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:14:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 842 transitions. [2023-08-04 09:14:12,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394572025052192 [2023-08-04 09:14:12,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 842 transitions. [2023-08-04 09:14:12,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 842 transitions. [2023-08-04 09:14:12,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:12,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 842 transitions. [2023-08-04 09:14:12,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 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) [2023-08-04 09:14:12,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 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) [2023-08-04 09:14:12,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 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) [2023-08-04 09:14:12,091 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 178 flow. Second operand 4 states and 842 transitions. [2023-08-04 09:14:12,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 15 transitions, 90 flow [2023-08-04 09:14:12,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 66 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 09:14:12,092 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:14:12,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:14:12,093 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -25 predicate places. [2023-08-04 09:14:12,094 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:14:12,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.8) internal successors, (1074), 5 states have internal predecessors, (1074), 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) [2023-08-04 09:14:12,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:14:12,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:12,306 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:12,308 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:14:12,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,374 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:14:12,375 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:14:12,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3261 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:14:12,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:12,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:14:12,436 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:14:12,436 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:14:12,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3261 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:14:12,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 5638 [2023-08-04 09:14:18,025 INFO L134 LiptonReduction]: Checked pairs total: 12494 [2023-08-04 09:14:18,025 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-04 09:14:18,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:14:18,027 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;@7d4ee9c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:18,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:14:18,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:18,031 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:14:18,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:14:18,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:18,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:18,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:14:18,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2063036250, now seen corresponding path program 1 times [2023-08-04 09:14:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:18,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202498291] [2023-08-04 09:14:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:14:18,089 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:14:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:14:18,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:14:18,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:14:18,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:14:18,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:14:18,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:14:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:14:18,129 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:14:18,129 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:14:18,130 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:14:18,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:14:18,158 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:14:18,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:18,637 INFO L124 PetriNetUnfolderBase]: 919/4212 cut-off events. [2023-08-04 09:14:18,637 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:14:18,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 4212 events. 919/4212 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 33128 event pairs, 11 based on Foata normal form. 0/3537 useless extension candidates. Maximal degree in co-relation 2523. Up to 192 conditions per place. [2023-08-04 09:14:18,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:18,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:18,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:18,698 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:18,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:14:19,165 INFO L124 PetriNetUnfolderBase]: 919/4212 cut-off events. [2023-08-04 09:14:19,166 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:14:19,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 4212 events. 919/4212 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 33128 event pairs, 11 based on Foata normal form. 0/3537 useless extension candidates. Maximal degree in co-relation 2523. Up to 192 conditions per place. [2023-08-04 09:14:19,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 14672 [2023-08-04 09:14:25,143 INFO L134 LiptonReduction]: Checked pairs total: 38707 [2023-08-04 09:14:25,143 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-04 09:14:25,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:14:25,145 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;@7d4ee9c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:25,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:14:25,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:25,148 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 09:14:25,148 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:14:25,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:25,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:25,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:25,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1580185100, now seen corresponding path program 1 times [2023-08-04 09:14:25,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:25,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642371323] [2023-08-04 09:14:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:25,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:14:25,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:25,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642371323] [2023-08-04 09:14:25,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642371323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:25,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:14:25,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:14:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92013005] [2023-08-04 09:14:25,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:14:25,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:14:25,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 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) [2023-08-04 09:14:25,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:25,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:14:25,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:46,206 INFO L124 PetriNetUnfolderBase]: 863260/1046375 cut-off events. [2023-08-04 09:15:46,206 INFO L125 PetriNetUnfolderBase]: For 114456/114456 co-relation queries the response was YES. [2023-08-04 09:15:48,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126254 conditions, 1046375 events. 863260/1046375 cut-off events. For 114456/114456 co-relation queries the response was YES. Maximal size of possible extension queue 19831. Compared 6040993 event pairs, 506238 based on Foata normal form. 0/723500 useless extension candidates. Maximal degree in co-relation 686954. Up to 1020030 conditions per place. [2023-08-04 09:15:53,074 INFO L140 encePairwiseOnDemand]: 541/549 looper letters, 67 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2023-08-04 09:15:53,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 396 flow [2023-08-04 09:15:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-08-04 09:15:53,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2023-08-04 09:15:53,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-08-04 09:15:53,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-08-04 09:15:53,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:53,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-08-04 09:15:53,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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) [2023-08-04 09:15:53,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:15:53,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:15:53,081 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 260 flow. Second operand 3 states and 765 transitions. [2023-08-04 09:15:53,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 396 flow [2023-08-04 09:15:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:15:53,283 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 244 flow [2023-08-04 09:15:53,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 09:15:53,283 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:15:53,283 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 244 flow [2023-08-04 09:15:53,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 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) [2023-08-04 09:15:53,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:53,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:53,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:15:53,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:53,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -997209464, now seen corresponding path program 1 times [2023-08-04 09:15:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:53,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537391718] [2023-08-04 09:15:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:53,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:15:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537391718] [2023-08-04 09:15:53,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537391718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727560679] [2023-08-04 09:15:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:53,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:53,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:53,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:15:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:53,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:53,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:15:53,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727560679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445701387] [2023-08-04 09:15:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:53,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:15:53,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 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) [2023-08-04 09:15:53,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:53,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:15:53,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:13,360 INFO L124 PetriNetUnfolderBase]: 854062/1036254 cut-off events. [2023-08-04 09:17:13,361 INFO L125 PetriNetUnfolderBase]: For 111558/111558 co-relation queries the response was YES. [2023-08-04 09:17:16,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103948 conditions, 1036254 events. 854062/1036254 cut-off events. For 111558/111558 co-relation queries the response was YES. Maximal size of possible extension queue 20063. Compared 6001236 event pairs, 462054 based on Foata normal form. 0/716447 useless extension candidates. Maximal degree in co-relation 2103908. Up to 1008875 conditions per place. [2023-08-04 09:17:20,122 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:17:20,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 416 flow [2023-08-04 09:17:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-08-04 09:17:20,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650880388585307 [2023-08-04 09:17:20,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-08-04 09:17:20,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-08-04 09:17:20,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:20,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-08-04 09:17:20,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 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) [2023-08-04 09:17:20,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:17:20,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:17:20,127 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 244 flow. Second operand 3 states and 766 transitions. [2023-08-04 09:17:20,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 416 flow [2023-08-04 09:17:20,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:17:20,516 INFO L231 Difference]: Finished difference. Result has 66 places, 79 transitions, 242 flow [2023-08-04 09:17:20,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=79} [2023-08-04 09:17:20,517 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-04 09:17:20,517 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 79 transitions, 242 flow [2023-08-04 09:17:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 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) [2023-08-04 09:17:20,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:20,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:20,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 09:17:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:17:20,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:20,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1408220327, now seen corresponding path program 1 times [2023-08-04 09:17:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979257109] [2023-08-04 09:17:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:17:20,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:20,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979257109] [2023-08-04 09:17:20,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979257109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112031535] [2023-08-04 09:17:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:20,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:20,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:20,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:17:20,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:17:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:20,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:20,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:17:20,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112031535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:20,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:17:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893404474] [2023-08-04 09:17:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:20,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:20,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:17:20,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 79 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 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) [2023-08-04 09:17:20,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:20,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:17:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:39,396 INFO L124 PetriNetUnfolderBase]: 854586/1044176 cut-off events. [2023-08-04 09:18:39,396 INFO L125 PetriNetUnfolderBase]: For 57349/57349 co-relation queries the response was YES. [2023-08-04 09:18:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111748 conditions, 1044176 events. 854586/1044176 cut-off events. For 57349/57349 co-relation queries the response was YES. Maximal size of possible extension queue 21236. Compared 6263040 event pairs, 474994 based on Foata normal form. 0/723916 useless extension candidates. Maximal degree in co-relation 721377. Up to 1000105 conditions per place. [2023-08-04 09:18:46,611 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 82 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-04 09:18:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 444 flow [2023-08-04 09:18:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-04 09:18:46,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693381906496661 [2023-08-04 09:18:46,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-04 09:18:46,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-04 09:18:46,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:46,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-04 09:18:46,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-08-04 09:18:46,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:18:46,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:18:46,618 INFO L175 Difference]: Start difference. First operand has 66 places, 79 transitions, 242 flow. Second operand 3 states and 773 transitions. [2023-08-04 09:18:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 444 flow [2023-08-04 09:18:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:18:46,668 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 252 flow [2023-08-04 09:18:46,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2023-08-04 09:18:46,668 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 09:18:46,668 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 252 flow [2023-08-04 09:18:46,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 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) [2023-08-04 09:18:46,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:46,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:46,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:46,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:46,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1343811328, now seen corresponding path program 1 times [2023-08-04 09:18:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739867978] [2023-08-04 09:18:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:18:46,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739867978] [2023-08-04 09:18:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739867978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709293428] [2023-08-04 09:18:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:46,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:46,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:18:46,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:18:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:47,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:47,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:18:47,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709293428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:47,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:47,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996879100] [2023-08-04 09:18:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:47,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:47,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:18:47,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 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) [2023-08-04 09:18:47,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:47,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:18:47,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:54,480 INFO L124 PetriNetUnfolderBase]: 713818/878328 cut-off events. [2023-08-04 09:19:54,480 INFO L125 PetriNetUnfolderBase]: For 41817/41817 co-relation queries the response was YES. [2023-08-04 09:19:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794159 conditions, 878328 events. 713818/878328 cut-off events. For 41817/41817 co-relation queries the response was YES. Maximal size of possible extension queue 16922. Compared 5279720 event pairs, 364892 based on Foata normal form. 0/620958 useless extension candidates. Maximal degree in co-relation 665835. Up to 693825 conditions per place. [2023-08-04 09:20:00,453 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 92 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:20:00,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 507 flow [2023-08-04 09:20:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:20:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:20:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:20:00,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474802671523983 [2023-08-04 09:20:00,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:20:00,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:20:00,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:20:00,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:20:00,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-08-04 09:20:00,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:20:00,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:20:00,460 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 252 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:20:00,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 507 flow [2023-08-04 09:20:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:20:00,511 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 262 flow [2023-08-04 09:20:00,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2023-08-04 09:20:00,511 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:20:00,511 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 262 flow [2023-08-04 09:20:00,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 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) [2023-08-04 09:20:00,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:00,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:00,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:20:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:20:00,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:00,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2030410517, now seen corresponding path program 1 times [2023-08-04 09:20:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256805483] [2023-08-04 09:20:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:20:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256805483] [2023-08-04 09:20:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256805483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:20:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208859972] [2023-08-04 09:20:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:00,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:20:00,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:20:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:00,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:20:00,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:20:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:20:00,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:20:00,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208859972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:20:00,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:20:00,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:20:00,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479675206] [2023-08-04 09:20:00,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:20:00,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:20:00,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:20:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:20:00,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:20:00,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 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) [2023-08-04 09:20:00,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:00,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:20:00,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:05,518 INFO L124 PetriNetUnfolderBase]: 642658/795332 cut-off events. [2023-08-04 09:21:05,518 INFO L125 PetriNetUnfolderBase]: For 94559/94559 co-relation queries the response was YES. [2023-08-04 09:21:08,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669110 conditions, 795332 events. 642658/795332 cut-off events. For 94559/94559 co-relation queries the response was YES. Maximal size of possible extension queue 13310. Compared 4773512 event pairs, 332282 based on Foata normal form. 0/580250 useless extension candidates. Maximal degree in co-relation 649367. Up to 612419 conditions per place. [2023-08-04 09:21:11,286 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 93 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 09:21:11,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 519 flow [2023-08-04 09:21:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:21:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474802671523983 [2023-08-04 09:21:11,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:21:11,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:21:11,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:11,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:21:11,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-08-04 09:21:11,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:21:11,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:21:11,293 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 262 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:21:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 519 flow [2023-08-04 09:21:18,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:18,263 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 272 flow [2023-08-04 09:21:18,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-08-04 09:21:18,263 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:21:18,263 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 272 flow [2023-08-04 09:21:18,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 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) [2023-08-04 09:21:18,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:18,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:18,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:21:18,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:21:18,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:18,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash -996377539, now seen corresponding path program 1 times [2023-08-04 09:21:18,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:18,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606529616] [2023-08-04 09:21:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:18,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:21:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606529616] [2023-08-04 09:21:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606529616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488163411] [2023-08-04 09:21:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:18,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:18,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:18,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:21:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:21:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:18,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:18,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:21:18,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488163411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:18,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:18,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:21:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601415392] [2023-08-04 09:21:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:18,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:21:18,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2023-08-04 09:21:18,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:18,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:21:18,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:24,681 INFO L124 PetriNetUnfolderBase]: 636003/788576 cut-off events. [2023-08-04 09:22:24,681 INFO L125 PetriNetUnfolderBase]: For 97929/97929 co-relation queries the response was YES. [2023-08-04 09:22:27,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674965 conditions, 788576 events. 636003/788576 cut-off events. For 97929/97929 co-relation queries the response was YES. Maximal size of possible extension queue 13092. Compared 4740264 event pairs, 382303 based on Foata normal form. 0/584379 useless extension candidates. Maximal degree in co-relation 1000667. Up to 702340 conditions per place. [2023-08-04 09:22:30,329 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 94 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2023-08-04 09:22:30,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 531 flow [2023-08-04 09:22:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:22:30,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474802671523983 [2023-08-04 09:22:30,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:22:30,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:22:30,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:30,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:22:30,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-08-04 09:22:30,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:22:30,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 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) [2023-08-04 09:22:30,335 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 272 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:22:30,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 531 flow Received shutdown request... [2023-08-04 09:25:06,508 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:25:06,508 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:25:07,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 09:25:07,524 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 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown