/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-bad-dot-product.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:04:28,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:04:28,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:04:28,201 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:04:28,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:04:28,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:04:28,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:04:28,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:04:28,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:04:28,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:04:28,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:04:28,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:04:28,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:04:28,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:04:28,218 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:04:28,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:04:28,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:04:28,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:04:28,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:04:28,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:04:28,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:04:28,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:04:28,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:04:28,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:04:28,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:04:28,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:04:28,221 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:04:28,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:04:28,221 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:04:28,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:04:28,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:04:28,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:04:28,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:04:28,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:04:28,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:04:28,224 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:04:28,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:04:28,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:04:28,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:04:28,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:04:28,399 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:04:28,399 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:04:28,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 09:04:29,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:04:29,625 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:04:29,626 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 09:04:29,634 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ffbf7f4/b182a5b5f5904a7caab8b50f560cba97/FLAG1ff9709c0 [2023-08-04 09:04:29,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ffbf7f4/b182a5b5f5904a7caab8b50f560cba97 [2023-08-04 09:04:29,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:04:29,659 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:04:29,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:04:29,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:04:29,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:04:29,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62bcf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29, skipping insertion in model container [2023-08-04 09:04:29,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,689 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:04:29,818 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-bad-dot-product.wvr_bound2.c[3108,3121] [2023-08-04 09:04:29,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:04:29,829 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:04:29,846 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-bad-dot-product.wvr_bound2.c[3108,3121] [2023-08-04 09:04:29,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:04:29,855 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:04:29,856 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:04:29,860 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:04:29,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29 WrapperNode [2023-08-04 09:04:29,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:04:29,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:04:29,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:04:29,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:04:29,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,893 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 328 [2023-08-04 09:04:29,893 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:04:29,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:04:29,894 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:04:29,894 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:04:29,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,910 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:04:29,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:04:29,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:04:29,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:04:29,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (1/1) ... [2023-08-04 09:04:29,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:04:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:29,974 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 09:04:29,997 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 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:04:30,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:04:30,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:04:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:04:30,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:04:30,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:04:30,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:04:30,037 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 09:04:30,161 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:04:30,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:04:30,498 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:04:30,610 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:04:30,610 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 09:04:30,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:04:30 BoogieIcfgContainer [2023-08-04 09:04:30,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:04:30,613 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:04:30,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:04:30,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:04:30,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:04:29" (1/3) ... [2023-08-04 09:04:30,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7e0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:04:30, skipping insertion in model container [2023-08-04 09:04:30,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:29" (2/3) ... [2023-08-04 09:04:30,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7e0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:04:30, skipping insertion in model container [2023-08-04 09:04:30,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:04:30" (3/3) ... [2023-08-04 09:04:30,616 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 09:04:30,621 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:04:30,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:04:30,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:04:30,627 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:04:30,730 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:04:30,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,020 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 09:04:31,020 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 09:04:31,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:31,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:31,158 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 09:04:31,158 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:31,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 09:04:31,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 17640 [2023-08-04 09:04:37,821 INFO L134 LiptonReduction]: Checked pairs total: 25777 [2023-08-04 09:04:37,821 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-04 09:04:37,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:04:37,835 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;@36535a47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:37,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:04:37,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:37,843 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2023-08-04 09:04:37,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:04:37,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:37,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:37,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:37,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -129760191, now seen corresponding path program 1 times [2023-08-04 09:04:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:37,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526865419] [2023-08-04 09:04:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:38,109 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 09:04:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526865419] [2023-08-04 09:04:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526865419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343521041] [2023-08-04 09:04:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:38,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:04:38,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:38,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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 09:04:38,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:38,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:38,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:38,933 INFO L124 PetriNetUnfolderBase]: 8208/10944 cut-off events. [2023-08-04 09:04:38,933 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2023-08-04 09:04:38,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22002 conditions, 10944 events. 8208/10944 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53789 event pairs, 4455 based on Foata normal form. 0/6617 useless extension candidates. Maximal degree in co-relation 19123. Up to 10574 conditions per place. [2023-08-04 09:04:38,988 INFO L140 encePairwiseOnDemand]: 564/568 looper letters, 53 selfloop transitions, 2 changer transitions 4/65 dead transitions. [2023-08-04 09:04:38,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 284 flow [2023-08-04 09:04:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2023-08-04 09:04:39,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636150234741784 [2023-08-04 09:04:39,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2023-08-04 09:04:39,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2023-08-04 09:04:39,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:39,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2023-08-04 09:04:39,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 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 09:04:39,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:39,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:39,035 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 162 flow. Second operand 3 states and 790 transitions. [2023-08-04 09:04:39,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 284 flow [2023-08-04 09:04:39,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:04:39,044 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 156 flow [2023-08-04 09:04:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2023-08-04 09:04:39,048 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-04 09:04:39,048 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 156 flow [2023-08-04 09:04:39,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 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 09:04:39,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:39,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:39,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:04:39,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:39,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash 309112432, now seen corresponding path program 1 times [2023-08-04 09:04:39,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:39,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124721147] [2023-08-04 09:04:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:39,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:39,159 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 09:04:39,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:39,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124721147] [2023-08-04 09:04:39,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124721147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:39,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521740457] [2023-08-04 09:04:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:39,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:39,162 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 09:04:39,192 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 09:04:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:39,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:39,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:39,276 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 09:04:39,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521740457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:39,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:39,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941303320] [2023-08-04 09:04:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:39,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:39,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 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 09:04:39,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:39,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:39,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:40,015 INFO L124 PetriNetUnfolderBase]: 7942/10507 cut-off events. [2023-08-04 09:04:40,016 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2023-08-04 09:04:40,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21139 conditions, 10507 events. 7942/10507 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 50722 event pairs, 3198 based on Foata normal form. 0/6319 useless extension candidates. Maximal degree in co-relation 18259. Up to 10144 conditions per place. [2023-08-04 09:04:40,061 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 58 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 09:04:40,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 300 flow [2023-08-04 09:04:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 794 transitions. [2023-08-04 09:04:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465962441314554 [2023-08-04 09:04:40,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 794 transitions. [2023-08-04 09:04:40,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 794 transitions. [2023-08-04 09:04:40,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:40,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 794 transitions. [2023-08-04 09:04:40,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 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 09:04:40,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:40,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:40,070 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 156 flow. Second operand 3 states and 794 transitions. [2023-08-04 09:04:40,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 300 flow [2023-08-04 09:04:40,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 284 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:04:40,074 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 148 flow [2023-08-04 09:04:40,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2023-08-04 09:04:40,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-04 09:04:40,075 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 148 flow [2023-08-04 09:04:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 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 09:04:40,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:40,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:40,083 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 09:04:40,281 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 09:04:40,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:40,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2042242608, now seen corresponding path program 1 times [2023-08-04 09:04:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:40,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923791966] [2023-08-04 09:04:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:40,383 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 09:04:40,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923791966] [2023-08-04 09:04:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923791966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:40,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13381791] [2023-08-04 09:04:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:40,389 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 09:04:40,392 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 09:04:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:40,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:40,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:40,495 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 09:04:40,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13381791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:40,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:40,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894290565] [2023-08-04 09:04:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:40,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:40,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 09:04:40,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:40,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:40,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:41,309 INFO L124 PetriNetUnfolderBase]: 7917/10504 cut-off events. [2023-08-04 09:04:41,309 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 09:04:41,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21146 conditions, 10504 events. 7917/10504 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 51239 event pairs, 3113 based on Foata normal form. 0/6388 useless extension candidates. Maximal degree in co-relation 11514. Up to 9581 conditions per place. [2023-08-04 09:04:41,351 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 63 selfloop transitions, 2 changer transitions 1/72 dead transitions. [2023-08-04 09:04:41,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 312 flow [2023-08-04 09:04:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-08-04 09:04:41,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688967136150235 [2023-08-04 09:04:41,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-08-04 09:04:41,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-08-04 09:04:41,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:41,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-08-04 09:04:41,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 09:04:41,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:41,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:41,360 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 148 flow. Second operand 3 states and 799 transitions. [2023-08-04 09:04:41,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 312 flow [2023-08-04 09:04:41,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:04:41,364 INFO L231 Difference]: Finished difference. Result has 48 places, 56 transitions, 152 flow [2023-08-04 09:04:41,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=56} [2023-08-04 09:04:41,366 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-04 09:04:41,366 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 56 transitions, 152 flow [2023-08-04 09:04:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 09:04:41,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:41,367 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 09:04:41,385 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 09:04:41,572 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 09:04:41,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:41,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 288354041, now seen corresponding path program 1 times [2023-08-04 09:04:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969134282] [2023-08-04 09:04:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:41,637 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 09:04:41,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969134282] [2023-08-04 09:04:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969134282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300658522] [2023-08-04 09:04:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:41,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:41,641 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 09:04:41,643 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 09:04:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:41,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:41,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:41,731 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 09:04:41,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300658522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:41,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653893659] [2023-08-04 09:04:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:41,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:41,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:41,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 56 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 09:04:41,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:41,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:41,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:42,146 INFO L124 PetriNetUnfolderBase]: 4722/6384 cut-off events. [2023-08-04 09:04:42,146 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-04 09:04:42,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13232 conditions, 6384 events. 4722/6384 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29110 event pairs, 1882 based on Foata normal form. 0/4048 useless extension candidates. Maximal degree in co-relation 6884. Up to 4646 conditions per place. [2023-08-04 09:04:42,163 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 68 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:04:42,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 338 flow [2023-08-04 09:04:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-08-04 09:04:42,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47124413145539906 [2023-08-04 09:04:42,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:42,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 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 09:04:42,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:42,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:42,170 INFO L175 Difference]: Start difference. First operand has 48 places, 56 transitions, 152 flow. Second operand 3 states and 803 transitions. [2023-08-04 09:04:42,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 338 flow [2023-08-04 09:04:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:04:42,172 INFO L231 Difference]: Finished difference. Result has 49 places, 57 transitions, 160 flow [2023-08-04 09:04:42,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=49, PETRI_TRANSITIONS=57} [2023-08-04 09:04:42,173 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-04 09:04:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 57 transitions, 160 flow [2023-08-04 09:04:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 09:04:42,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:42,173 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 09:04:42,183 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 09:04:42,377 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 09:04:42,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:42,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1139608043, now seen corresponding path program 1 times [2023-08-04 09:04:42,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296307454] [2023-08-04 09:04:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:42,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:42,445 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 09:04:42,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296307454] [2023-08-04 09:04:42,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296307454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549830496] [2023-08-04 09:04:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:42,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:42,457 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 09:04:42,458 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 09:04:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:42,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:42,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:42,555 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 09:04:42,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:42,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549830496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:42,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:42,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443243329] [2023-08-04 09:04:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:42,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:42,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:42,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 57 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 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 09:04:42,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:42,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:42,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:42,884 INFO L124 PetriNetUnfolderBase]: 4070/5511 cut-off events. [2023-08-04 09:04:42,884 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-08-04 09:04:42,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11731 conditions, 5511 events. 4070/5511 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24183 event pairs, 1994 based on Foata normal form. 0/3677 useless extension candidates. Maximal degree in co-relation 6237. Up to 4674 conditions per place. [2023-08-04 09:04:42,943 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 69 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 09:04:42,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 348 flow [2023-08-04 09:04:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-08-04 09:04:42,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47124413145539906 [2023-08-04 09:04:42,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:42,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-08-04 09:04:42,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 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 09:04:42,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:42,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:42,952 INFO L175 Difference]: Start difference. First operand has 49 places, 57 transitions, 160 flow. Second operand 3 states and 803 transitions. [2023-08-04 09:04:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 348 flow [2023-08-04 09:04:42,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:42,961 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 170 flow [2023-08-04 09:04:42,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2023-08-04 09:04:42,962 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-04 09:04:42,962 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 170 flow [2023-08-04 09:04:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 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 09:04:42,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:42,963 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] [2023-08-04 09:04:42,971 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 09:04:43,167 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 09:04:43,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:43,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 505448213, now seen corresponding path program 1 times [2023-08-04 09:04:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787151238] [2023-08-04 09:04:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:43,220 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 09:04:43,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:43,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787151238] [2023-08-04 09:04:43,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787151238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:43,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498248666] [2023-08-04 09:04:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:43,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:43,241 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 09:04:43,273 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 09:04:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:43,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:43,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:43,368 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 09:04:43,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:43,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498248666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:43,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:43,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:04:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943195707] [2023-08-04 09:04:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:43,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:43,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 568 [2023-08-04 09:04:43,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 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 09:04:43,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:43,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 568 [2023-08-04 09:04:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:43,685 INFO L124 PetriNetUnfolderBase]: 4048/5476 cut-off events. [2023-08-04 09:04:43,685 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-04 09:04:43,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11727 conditions, 5476 events. 4048/5476 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23962 event pairs, 2235 based on Foata normal form. 0/3682 useless extension candidates. Maximal degree in co-relation 9716. Up to 5260 conditions per place. [2023-08-04 09:04:43,705 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 63 selfloop transitions, 2 changer transitions 3/74 dead transitions. [2023-08-04 09:04:43,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 338 flow [2023-08-04 09:04:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-08-04 09:04:43,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688967136150235 [2023-08-04 09:04:43,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-08-04 09:04:43,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-08-04 09:04:43,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:43,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-08-04 09:04:43,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 09:04:43,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:43,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 09:04:43,712 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 170 flow. Second operand 3 states and 799 transitions. [2023-08-04 09:04:43,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 338 flow [2023-08-04 09:04:43,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:43,723 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 168 flow [2023-08-04 09:04:43,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-08-04 09:04:43,725 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-04 09:04:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 168 flow [2023-08-04 09:04:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 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 09:04:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:43,726 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] [2023-08-04 09:04:43,751 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 09:04:43,930 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 09:04:43,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:43,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1222468383, now seen corresponding path program 1 times [2023-08-04 09:04:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846022511] [2023-08-04 09:04:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:43,978 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 09:04:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846022511] [2023-08-04 09:04:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846022511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547349444] [2023-08-04 09:04:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:43,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:43,989 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 09:04:44,016 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 09:04:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:44,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:04:44,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:44,122 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 09:04:44,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:04:44,141 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 09:04:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547349444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:04:44,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:04:44,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:04:44,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835702970] [2023-08-04 09:04:44,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:04:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:04:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:04:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:44,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 568 [2023-08-04 09:04:44,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 09:04:44,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:44,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 568 [2023-08-04 09:04:44,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:44,179 INFO L124 PetriNetUnfolderBase]: 17/36 cut-off events. [2023-08-04 09:04:44,179 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 09:04:44,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 36 events. 17/36 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 54 event pairs, 4 based on Foata normal form. 5/32 useless extension candidates. Maximal degree in co-relation 76. Up to 23 conditions per place. [2023-08-04 09:04:44,179 INFO L140 encePairwiseOnDemand]: 565/568 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-04 09:04:44,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 82 flow [2023-08-04 09:04:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:04:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:04:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 992 transitions. [2023-08-04 09:04:44,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43661971830985913 [2023-08-04 09:04:44,181 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 992 transitions. [2023-08-04 09:04:44,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 992 transitions. [2023-08-04 09:04:44,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:44,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 992 transitions. [2023-08-04 09:04:44,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 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 09:04:44,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 568.0) internal successors, (2840), 5 states have internal predecessors, (2840), 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 09:04:44,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 568.0) internal successors, (2840), 5 states have internal predecessors, (2840), 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 09:04:44,186 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 168 flow. Second operand 4 states and 992 transitions. [2023-08-04 09:04:44,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 82 flow [2023-08-04 09:04:44,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:44,186 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 09:04:44,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 09:04:44,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -27 predicate places. [2023-08-04 09:04:44,187 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 09:04:44,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 09:04:44,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:04:44,199 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 09:04:44,393 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 09:04:44,393 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:44,395 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:04:44,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,474 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 09:04:44,474 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:44,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 09:04:44,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:44,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 09:04:44,542 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 09:04:44,542 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:44,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 09:04:44,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 17640 [2023-08-04 09:04:50,494 INFO L134 LiptonReduction]: Checked pairs total: 24936 [2023-08-04 09:04:50,494 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-08-04 09:04:50,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:04:50,521 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;@36535a47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:50,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:04:50,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:50,525 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:04:50,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:04:50,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:50,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:50,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:04:50,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -641357254, now seen corresponding path program 1 times [2023-08-04 09:04:50,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:50,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079098490] [2023-08-04 09:04:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:50,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:50,607 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 09:04:50,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:50,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079098490] [2023-08-04 09:04:50,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079098490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:50,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:50,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987190398] [2023-08-04 09:04:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:04:50,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:04:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:04:50,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 564 [2023-08-04 09:04:50,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 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 09:04:50,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:50,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 564 [2023-08-04 09:04:50,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:51,244 INFO L124 PetriNetUnfolderBase]: 8512/11368 cut-off events. [2023-08-04 09:04:51,244 INFO L125 PetriNetUnfolderBase]: For 634/634 co-relation queries the response was YES. [2023-08-04 09:04:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22857 conditions, 11368 events. 8512/11368 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 56475 event pairs, 4591 based on Foata normal form. 0/6882 useless extension candidates. Maximal degree in co-relation 19159. Up to 11009 conditions per place. [2023-08-04 09:04:51,276 INFO L140 encePairwiseOnDemand]: 559/564 looper letters, 30 selfloop transitions, 2 changer transitions 24/62 dead transitions. [2023-08-04 09:04:51,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 272 flow [2023-08-04 09:04:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:04:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:04:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 991 transitions. [2023-08-04 09:04:51,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927304964539005 [2023-08-04 09:04:51,279 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 991 transitions. [2023-08-04 09:04:51,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 991 transitions. [2023-08-04 09:04:51,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:51,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 991 transitions. [2023-08-04 09:04:51,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 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 09:04:51,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 564.0) internal successors, (2820), 5 states have internal predecessors, (2820), 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 09:04:51,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 564.0) internal successors, (2820), 5 states have internal predecessors, (2820), 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 09:04:51,283 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 162 flow. Second operand 4 states and 991 transitions. [2023-08-04 09:04:51,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 272 flow [2023-08-04 09:04:51,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:04:51,285 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 103 flow [2023-08-04 09:04:51,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-04 09:04:51,287 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-08-04 09:04:51,287 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 103 flow [2023-08-04 09:04:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 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 09:04:51,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:51,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:51,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:04:51,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:04:51,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 132050160, now seen corresponding path program 1 times [2023-08-04 09:04:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:51,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694270653] [2023-08-04 09:04:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:51,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:04:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:51,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:04:51,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:04:51,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:04:51,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:04:51,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:04:51,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:04:51,378 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:04:51,379 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:04:51,379 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:04:51,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:04:51,419 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:04:51,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:51,964 INFO L124 PetriNetUnfolderBase]: 973/4658 cut-off events. [2023-08-04 09:04:51,964 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:04:52,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 4658 events. 973/4658 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 38348 event pairs, 11 based on Foata normal form. 0/3929 useless extension candidates. Maximal degree in co-relation 2813. Up to 192 conditions per place. [2023-08-04 09:04:52,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:52,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:52,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:52,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:52,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:52,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 09:04:52,627 INFO L124 PetriNetUnfolderBase]: 973/4658 cut-off events. [2023-08-04 09:04:52,627 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:04:52,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 4658 events. 973/4658 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 38348 event pairs, 11 based on Foata normal form. 0/3929 useless extension candidates. Maximal degree in co-relation 2813. Up to 192 conditions per place. [2023-08-04 09:04:52,841 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 09:04:59,973 INFO L134 LiptonReduction]: Checked pairs total: 85313 [2023-08-04 09:04:59,973 INFO L136 LiptonReduction]: Total number of compositions: 364 [2023-08-04 09:04:59,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:04:59,976 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;@36535a47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:59,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:04:59,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:59,978 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:04:59,978 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:04:59,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:59,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:59,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:59,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:59,979 INFO L85 PathProgramCache]: Analyzing trace with hash 435121475, now seen corresponding path program 1 times [2023-08-04 09:04:59,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:59,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854426277] [2023-08-04 09:04:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:59,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:00,020 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 09:05:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854426277] [2023-08-04 09:05:00,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854426277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:00,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:05:00,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:05:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870636029] [2023-08-04 09:05:00,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:00,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:00,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:05:00,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 747 [2023-08-04 09:05:00,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 09:05:00,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:00,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 747 [2023-08-04 09:05:00,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand