/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_parallel-bakery-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:41:54,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:41:54,705 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:41:54,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:41:54,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:41:54,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:41:54,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:41:54,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:41:54,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:41:54,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:41:54,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:41:54,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:41:54,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:41:54,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:41:54,750 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:41:54,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:41:54,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:41:54,750 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:41:54,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:41:54,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:41:54,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:41:54,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:41:54,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:41:54,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:41:54,752 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:41:54,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:41:54,753 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:41:54,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:41:54,753 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:41:54,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:41:54,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:41:54,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:41:54,755 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:41:54,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:41:54,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:41:54,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:41:54,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:41:54,756 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:41:54,756 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:41:54,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:41:54,756 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:41:54,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:41:54,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:41:54,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:41:55,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:41:55,003 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:41:55,003 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:41:55,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-3.wvr_bound2.c [2023-08-04 08:41:56,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:41:56,368 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:41:56,369 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-3.wvr_bound2.c [2023-08-04 08:41:56,383 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2578cdadc/4fff7173275b469d9ff4618f6184cce8/FLAGb20a2132e [2023-08-04 08:41:56,396 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2578cdadc/4fff7173275b469d9ff4618f6184cce8 [2023-08-04 08:41:56,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:41:56,400 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:41:56,401 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:41:56,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:41:56,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:41:56,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c8f109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56, skipping insertion in model container [2023-08-04 08:41:56,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,430 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:41:56,628 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_parallel-bakery-3.wvr_bound2.c[5669,5682] [2023-08-04 08:41:56,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:41:56,638 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:41:56,683 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_parallel-bakery-3.wvr_bound2.c[5669,5682] [2023-08-04 08:41:56,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:41:56,692 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:41:56,692 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:41:56,698 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:41:56,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56 WrapperNode [2023-08-04 08:41:56,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:41:56,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:41:56,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:41:56,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:41:56,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,735 INFO L138 Inliner]: procedures = 22, calls = 110, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 313 [2023-08-04 08:41:56,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:41:56,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:41:56,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:41:56,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:41:56,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:41:56,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:41:56,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:41:56,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:41:56,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (1/1) ... [2023-08-04 08:41:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:41:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:56,820 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 08:41:56,822 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 08:41:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:41:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:41:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:41:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:41:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:41:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:41:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:41:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:41:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:41:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:41:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:41:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:41:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:41:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:41:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:41:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:41:56,866 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 08:41:56,964 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:41:56,966 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:41:57,301 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:41:57,392 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:41:57,392 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:41:57,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:41:57 BoogieIcfgContainer [2023-08-04 08:41:57,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:41:57,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:41:57,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:41:57,399 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:41:57,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:41:56" (1/3) ... [2023-08-04 08:41:57,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694ece8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:41:57, skipping insertion in model container [2023-08-04 08:41:57,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:56" (2/3) ... [2023-08-04 08:41:57,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694ece8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:41:57, skipping insertion in model container [2023-08-04 08:41:57,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:41:57" (3/3) ... [2023-08-04 08:41:57,402 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-bakery-3.wvr_bound2.c [2023-08-04 08:41:57,408 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:41:57,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:41:57,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:41:57,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:41:57,475 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:41:57,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 203 transitions, 448 flow [2023-08-04 08:41:57,761 INFO L124 PetriNetUnfolderBase]: 83/687 cut-off events. [2023-08-04 08:41:57,761 INFO L125 PetriNetUnfolderBase]: For 36/53 co-relation queries the response was YES. [2023-08-04 08:41:57,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 687 events. 83/687 cut-off events. For 36/53 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3812 event pairs, 0 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 396. Up to 16 conditions per place. [2023-08-04 08:41:57,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 203 transitions, 448 flow [2023-08-04 08:41:57,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 190 transitions, 416 flow [2023-08-04 08:41:57,779 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:41:57,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 190 transitions, 416 flow [2023-08-04 08:41:57,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 190 transitions, 416 flow [2023-08-04 08:41:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 190 transitions, 416 flow [2023-08-04 08:41:57,872 INFO L124 PetriNetUnfolderBase]: 83/600 cut-off events. [2023-08-04 08:41:57,872 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:41:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 600 events. 83/600 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3027 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 350. Up to 16 conditions per place. [2023-08-04 08:41:57,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 6636 [2023-08-04 08:42:01,328 INFO L134 LiptonReduction]: Checked pairs total: 42249 [2023-08-04 08:42:01,328 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 08:42:01,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:42:01,347 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;@e209c66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:42:01,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:42:01,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:42:01,353 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2023-08-04 08:42:01,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:42:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:01,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:01,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -197479609, now seen corresponding path program 1 times [2023-08-04 08:42:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166391685] [2023-08-04 08:42:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:01,566 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 08:42:01,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:01,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166391685] [2023-08-04 08:42:01,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166391685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:01,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:42:01,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:42:01,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935248224] [2023-08-04 08:42:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:01,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:01,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:42:01,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:01,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 08:42:01,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:01,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:01,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:03,616 INFO L124 PetriNetUnfolderBase]: 12362/20426 cut-off events. [2023-08-04 08:42:03,617 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2023-08-04 08:42:03,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39060 conditions, 20426 events. 12362/20426 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 162693 event pairs, 7638 based on Foata normal form. 0/17920 useless extension candidates. Maximal degree in co-relation 35063. Up to 17917 conditions per place. [2023-08-04 08:42:03,771 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 53 selfloop transitions, 2 changer transitions 1/77 dead transitions. [2023-08-04 08:42:03,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 302 flow [2023-08-04 08:42:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-04 08:42:03,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449101796407185 [2023-08-04 08:42:03,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-04 08:42:03,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-04 08:42:03,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:03,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-04 08:42:03,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 08:42:03,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:03,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:03,800 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 176 flow. Second operand 3 states and 546 transitions. [2023-08-04 08:42:03,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 302 flow [2023-08-04 08:42:03,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 290 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:42:03,816 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 172 flow [2023-08-04 08:42:03,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-08-04 08:42:03,820 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 08:42:03,821 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 172 flow [2023-08-04 08:42:03,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 08:42:03,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:03,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:42:03,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:03,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1639072638, now seen corresponding path program 1 times [2023-08-04 08:42:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:03,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242460050] [2023-08-04 08:42:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:03,910 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 08:42:03,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:03,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242460050] [2023-08-04 08:42:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242460050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:03,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305024135] [2023-08-04 08:42:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:03,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:03,921 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 08:42:03,940 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 08:42:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:03,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:03,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:04,024 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 08:42:04,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305024135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:04,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:42:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015615037] [2023-08-04 08:42:04,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:04,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:04,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 08:42:04,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:04,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:05,749 INFO L124 PetriNetUnfolderBase]: 12084/19722 cut-off events. [2023-08-04 08:42:05,749 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2023-08-04 08:42:05,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37870 conditions, 19722 events. 12084/19722 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 154471 event pairs, 11540 based on Foata normal form. 0/17400 useless extension candidates. Maximal degree in co-relation 27767. Up to 17370 conditions per place. [2023-08-04 08:42:05,871 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 59 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2023-08-04 08:42:05,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 322 flow [2023-08-04 08:42:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-04 08:42:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508982035928144 [2023-08-04 08:42:05,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-04 08:42:05,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-04 08:42:05,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:05,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-04 08:42:05,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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 08:42:05,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:05,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:05,887 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 172 flow. Second operand 3 states and 552 transitions. [2023-08-04 08:42:05,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 322 flow [2023-08-04 08:42:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:42:05,891 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 176 flow [2023-08-04 08:42:05,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-04 08:42:05,892 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-04 08:42:05,892 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 176 flow [2023-08-04 08:42:05,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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 08:42:05,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:05,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:05,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:42:06,102 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 08:42:06,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:06,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1315349591, now seen corresponding path program 1 times [2023-08-04 08:42:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263144603] [2023-08-04 08:42:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:06,216 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 08:42:06,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263144603] [2023-08-04 08:42:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263144603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335430037] [2023-08-04 08:42:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:06,219 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 08:42:06,222 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 08:42:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:06,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:06,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:06,317 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 08:42:06,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335430037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:06,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:42:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324777410] [2023-08-04 08:42:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:06,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 08:42:06,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:06,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:06,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:07,722 INFO L124 PetriNetUnfolderBase]: 12035/19527 cut-off events. [2023-08-04 08:42:07,722 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-04 08:42:07,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37773 conditions, 19527 events. 12035/19527 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 150967 event pairs, 10601 based on Foata normal form. 0/17351 useless extension candidates. Maximal degree in co-relation 27647. Up to 16241 conditions per place. [2023-08-04 08:42:07,836 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 65 selfloop transitions, 2 changer transitions 1/89 dead transitions. [2023-08-04 08:42:07,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 350 flow [2023-08-04 08:42:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-04 08:42:07,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568862275449101 [2023-08-04 08:42:07,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-04 08:42:07,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-04 08:42:07,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:07,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-04 08:42:07,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 08:42:07,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:07,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:07,844 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 176 flow. Second operand 3 states and 558 transitions. [2023-08-04 08:42:07,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 350 flow [2023-08-04 08:42:07,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:42:07,847 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 180 flow [2023-08-04 08:42:07,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-04 08:42:07,849 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 08:42:07,849 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 180 flow [2023-08-04 08:42:07,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 08:42:07,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:07,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:07,858 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 08:42:08,055 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 08:42:08,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:08,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1288502752, now seen corresponding path program 1 times [2023-08-04 08:42:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:08,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485040522] [2023-08-04 08:42:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:08,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:08,160 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 08:42:08,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:08,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485040522] [2023-08-04 08:42:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485040522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755793100] [2023-08-04 08:42:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:08,162 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 08:42:08,165 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 08:42:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:08,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:08,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:08,238 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 08:42:08,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:08,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755793100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:08,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:08,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:42:08,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66369682] [2023-08-04 08:42:08,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:08,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:08,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 08:42:08,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:08,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:08,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:09,072 INFO L124 PetriNetUnfolderBase]: 6827/11091 cut-off events. [2023-08-04 08:42:09,073 INFO L125 PetriNetUnfolderBase]: For 910/910 co-relation queries the response was YES. [2023-08-04 08:42:09,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22849 conditions, 11091 events. 6827/11091 cut-off events. For 910/910 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 78993 event pairs, 4699 based on Foata normal form. 0/10282 useless extension candidates. Maximal degree in co-relation 16889. Up to 7372 conditions per place. [2023-08-04 08:42:09,135 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 08:42:09,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 376 flow [2023-08-04 08:42:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-04 08:42:09,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608782435129741 [2023-08-04 08:42:09,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-04 08:42:09,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-04 08:42:09,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:09,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-04 08:42:09,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 08:42:09,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:09,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:09,143 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 180 flow. Second operand 3 states and 562 transitions. [2023-08-04 08:42:09,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 376 flow [2023-08-04 08:42:09,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:42:09,147 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 188 flow [2023-08-04 08:42:09,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-04 08:42:09,149 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 08:42:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 188 flow [2023-08-04 08:42:09,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 08:42:09,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:09,150 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] [2023-08-04 08:42:09,158 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 08:42:09,358 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 08:42:09,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:09,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:09,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1349189705, now seen corresponding path program 1 times [2023-08-04 08:42:09,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:09,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722928134] [2023-08-04 08:42:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:09,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:09,463 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 08:42:09,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722928134] [2023-08-04 08:42:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722928134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660033021] [2023-08-04 08:42:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:09,468 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 08:42:09,488 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 08:42:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:09,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:09,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:09,562 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 08:42:09,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660033021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:42:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095767454] [2023-08-04 08:42:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:09,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:09,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:09,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 08:42:09,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:09,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:10,252 INFO L124 PetriNetUnfolderBase]: 6028/10101 cut-off events. [2023-08-04 08:42:10,252 INFO L125 PetriNetUnfolderBase]: For 2150/2150 co-relation queries the response was YES. [2023-08-04 08:42:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21041 conditions, 10101 events. 6028/10101 cut-off events. For 2150/2150 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 72281 event pairs, 5441 based on Foata normal form. 0/9812 useless extension candidates. Maximal degree in co-relation 15420. Up to 8064 conditions per place. [2023-08-04 08:42:10,308 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 08:42:10,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 386 flow [2023-08-04 08:42:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-04 08:42:10,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608782435129741 [2023-08-04 08:42:10,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-04 08:42:10,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-04 08:42:10,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:10,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-04 08:42:10,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 08:42:10,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:10,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:10,315 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 188 flow. Second operand 3 states and 562 transitions. [2023-08-04 08:42:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 386 flow [2023-08-04 08:42:10,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:10,336 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 198 flow [2023-08-04 08:42:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-04 08:42:10,337 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-04 08:42:10,337 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 198 flow [2023-08-04 08:42:10,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 08:42:10,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:10,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:10,343 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 08:42:10,543 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 08:42:10,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:10,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1374247466, now seen corresponding path program 1 times [2023-08-04 08:42:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255067592] [2023-08-04 08:42:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:10,650 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 08:42:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255067592] [2023-08-04 08:42:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255067592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:10,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744209197] [2023-08-04 08:42:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:10,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:10,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:10,652 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 08:42:10,655 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 08:42:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:10,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:10,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:10,751 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 08:42:10,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744209197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:10,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:42:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175866725] [2023-08-04 08:42:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:10,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:10,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:10,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 334 [2023-08-04 08:42:10,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 08:42:10,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:10,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 334 [2023-08-04 08:42:10,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:11,353 INFO L124 PetriNetUnfolderBase]: 6009/10063 cut-off events. [2023-08-04 08:42:11,353 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2023-08-04 08:42:11,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21055 conditions, 10063 events. 6009/10063 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 72020 event pairs, 5946 based on Foata normal form. 0/9817 useless extension candidates. Maximal degree in co-relation 18342. Up to 8884 conditions per place. [2023-08-04 08:42:11,404 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 65 selfloop transitions, 2 changer transitions 3/91 dead transitions. [2023-08-04 08:42:11,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 376 flow [2023-08-04 08:42:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-04 08:42:11,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568862275449101 [2023-08-04 08:42:11,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-04 08:42:11,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-04 08:42:11,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:11,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-04 08:42:11,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 08:42:11,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:11,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 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 08:42:11,412 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 198 flow. Second operand 3 states and 558 transitions. [2023-08-04 08:42:11,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 376 flow [2023-08-04 08:42:11,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:11,442 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 196 flow [2023-08-04 08:42:11,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-08-04 08:42:11,443 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2023-08-04 08:42:11,443 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 196 flow [2023-08-04 08:42:11,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 08:42:11,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:11,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:42:11,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:42:11,652 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 08:42:11,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:11,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1067556613, now seen corresponding path program 1 times [2023-08-04 08:42:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:11,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035740703] [2023-08-04 08:42:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:11,747 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 08:42:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:11,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035740703] [2023-08-04 08:42:11,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035740703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:11,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134721275] [2023-08-04 08:42:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:11,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:11,754 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 08:42:11,773 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 08:42:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:11,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:42:11,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:11,883 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 08:42:11,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:42:11,906 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 08:42:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134721275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:42:11,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:42:11,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:42:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517086564] [2023-08-04 08:42:11,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:42:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:42:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:42:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:11,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 334 [2023-08-04 08:42:11,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 171.8) internal successors, (859), 5 states have internal predecessors, (859), 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 08:42:11,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:11,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 334 [2023-08-04 08:42:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:11,944 INFO L124 PetriNetUnfolderBase]: 12/46 cut-off events. [2023-08-04 08:42:11,944 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 08:42:11,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 46 events. 12/46 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 6 based on Foata normal form. 7/51 useless extension candidates. Maximal degree in co-relation 89. Up to 26 conditions per place. [2023-08-04 08:42:11,944 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-04 08:42:11,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-08-04 08:42:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:42:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:42:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2023-08-04 08:42:11,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49850299401197606 [2023-08-04 08:42:11,947 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2023-08-04 08:42:11,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2023-08-04 08:42:11,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:11,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2023-08-04 08:42:11,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 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 08:42:11,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 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 08:42:11,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 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 08:42:11,952 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 196 flow. Second operand 4 states and 666 transitions. [2023-08-04 08:42:11,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-08-04 08:42:11,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 82 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:11,953 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-04 08:42:11,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-04 08:42:11,954 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -39 predicate places. [2023-08-04 08:42:11,954 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-04 08:42:11,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.8) internal successors, (859), 5 states have internal predecessors, (859), 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 08:42:11,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:42:11,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:42:12,162 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 08:42:12,163 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:12,164 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:42:12,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 203 transitions, 448 flow [2023-08-04 08:42:12,232 INFO L124 PetriNetUnfolderBase]: 83/687 cut-off events. [2023-08-04 08:42:12,232 INFO L125 PetriNetUnfolderBase]: For 36/53 co-relation queries the response was YES. [2023-08-04 08:42:12,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 687 events. 83/687 cut-off events. For 36/53 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3812 event pairs, 0 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 396. Up to 16 conditions per place. [2023-08-04 08:42:12,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 203 transitions, 448 flow [2023-08-04 08:42:12,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 147 transitions, 309 flow [2023-08-04 08:42:12,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:42:12,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 147 transitions, 309 flow [2023-08-04 08:42:12,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 147 transitions, 309 flow [2023-08-04 08:42:12,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 147 transitions, 309 flow [2023-08-04 08:42:12,259 INFO L124 PetriNetUnfolderBase]: 7/287 cut-off events. [2023-08-04 08:42:12,259 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:42:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 287 events. 7/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 889 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 196. Up to 8 conditions per place. [2023-08-04 08:42:12,263 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-08-04 08:42:15,427 INFO L134 LiptonReduction]: Checked pairs total: 20931 [2023-08-04 08:42:15,428 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 08:42:15,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:42:15,430 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;@e209c66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:42:15,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:42:15,432 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:42:15,432 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 08:42:15,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:42:15,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:15,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:42:15,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:42:15,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1244552112, now seen corresponding path program 1 times [2023-08-04 08:42:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:15,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711103149] [2023-08-04 08:42:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:42:15,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:15,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711103149] [2023-08-04 08:42:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711103149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:15,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:42:15,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:42:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001523466] [2023-08-04 08:42:15,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:15,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:42:15,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 306 [2023-08-04 08:42:15,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 08:42:15,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:15,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 306 [2023-08-04 08:42:15,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:15,726 INFO L124 PetriNetUnfolderBase]: 1920/3622 cut-off events. [2023-08-04 08:42:15,726 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-04 08:42:15,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 3622 events. 1920/3622 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 25028 event pairs, 1050 based on Foata normal form. 0/3422 useless extension candidates. Maximal degree in co-relation 6784. Up to 2936 conditions per place. [2023-08-04 08:42:15,741 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 34 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 08:42:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 201 flow [2023-08-04 08:42:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-04 08:42:15,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729847494553377 [2023-08-04 08:42:15,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-04 08:42:15,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-04 08:42:15,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:15,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-04 08:42:15,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 08:42:15,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 08:42:15,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 08:42:15,747 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 115 flow. Second operand 3 states and 526 transitions. [2023-08-04 08:42:15,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 201 flow [2023-08-04 08:42:15,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:42:15,749 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 123 flow [2023-08-04 08:42:15,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-08-04 08:42:15,750 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 08:42:15,750 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 123 flow [2023-08-04 08:42:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 08:42:15,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:15,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:42:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:42:15,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:42:15,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1216125141, now seen corresponding path program 1 times [2023-08-04 08:42:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:15,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113314148] [2023-08-04 08:42:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:42:15,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:42:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:42:15,791 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:42:15,791 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:42:15,791 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:42:15,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:42:15,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:42:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:42:15,792 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:42:15,792 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:42:15,793 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:42:15,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:42:15,824 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:42:15,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 257 transitions, 604 flow [2023-08-04 08:42:16,370 INFO L124 PetriNetUnfolderBase]: 835/4252 cut-off events. [2023-08-04 08:42:16,370 INFO L125 PetriNetUnfolderBase]: For 602/670 co-relation queries the response was YES. [2023-08-04 08:42:16,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4926 conditions, 4252 events. 835/4252 cut-off events. For 602/670 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 35975 event pairs, 26 based on Foata normal form. 0/3661 useless extension candidates. Maximal degree in co-relation 2542. Up to 192 conditions per place. [2023-08-04 08:42:16,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 257 transitions, 604 flow [2023-08-04 08:42:16,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 244 transitions, 566 flow [2023-08-04 08:42:16,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:42:16,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 244 transitions, 566 flow [2023-08-04 08:42:16,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 244 transitions, 566 flow [2023-08-04 08:42:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 244 transitions, 566 flow [2023-08-04 08:42:16,834 INFO L124 PetriNetUnfolderBase]: 835/3599 cut-off events. [2023-08-04 08:42:16,834 INFO L125 PetriNetUnfolderBase]: For 589/623 co-relation queries the response was YES. [2023-08-04 08:42:16,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4247 conditions, 3599 events. 835/3599 cut-off events. For 589/623 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 28602 event pairs, 26 based on Foata normal form. 0/3072 useless extension candidates. Maximal degree in co-relation 2210. Up to 192 conditions per place. [2023-08-04 08:42:16,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 18564 [2023-08-04 08:42:20,566 INFO L134 LiptonReduction]: Checked pairs total: 178567 [2023-08-04 08:42:20,566 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-04 08:42:20,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:42:20,568 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;@e209c66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:42:20,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:42:20,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:42:20,571 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:42:20,571 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:42:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:20,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:20,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:20,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 422465166, now seen corresponding path program 1 times [2023-08-04 08:42:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943824069] [2023-08-04 08:42:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:20,592 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 08:42:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:20,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943824069] [2023-08-04 08:42:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943824069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:20,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:42:20,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:42:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193352929] [2023-08-04 08:42:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:20,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:42:20,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 393 [2023-08-04 08:42:20,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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 08:42:20,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:20,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 393 [2023-08-04 08:42:20,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand