/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_71-funloop_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:25:56,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:25:56,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:25:56,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:25:56,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:25:56,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:25:56,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:25:56,699 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:25:56,699 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:25:56,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:25:56,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:25:56,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:25:56,704 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:25:56,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:25:56,705 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:25:56,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:25:56,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:25:56,706 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:25:56,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:25:56,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:25:56,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:25:56,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:25:56,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:25:56,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:25:56,707 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:25:56,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:25:56,708 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:25:56,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:25:56,708 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:25:56,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:56,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:25:56,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:25:56,711 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:25:56,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:25:56,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:25:56,711 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:25:56,711 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:25:56,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:25:56,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:25:56,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:25:56,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:25:56,936 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:25:56,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_71-funloop_racing_bound2.i [2023-08-03 21:25:58,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:25:58,341 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:25:58,342 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_71-funloop_racing_bound2.i [2023-08-03 21:25:58,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bc9fee0/c9f67a8f46094533890062603f4a751e/FLAGa6b4e229e [2023-08-03 21:25:58,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bc9fee0/c9f67a8f46094533890062603f4a751e [2023-08-03 21:25:58,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:25:58,378 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:25:58,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:58,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:25:58,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:25:58,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:58,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a98c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58, skipping insertion in model container [2023-08-03 21:25:58,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:58,427 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:25:58,807 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_71-funloop_racing_bound2.i[41323,41336] [2023-08-03 21:25:58,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:58,862 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:25:58,882 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:58,884 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:25:58,894 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-03 21:25:58,904 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_71-funloop_racing_bound2.i[41323,41336] [2023-08-03 21:25:58,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:25:58,974 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:25:58,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58 WrapperNode [2023-08-03 21:25:58,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:25:58,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:58,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:25:58,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:25:58,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,042 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2023-08-03 21:25:59,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:25:59,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:25:59,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:25:59,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:25:59,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:25:59,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:25:59,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:25:59,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:25:59,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (1/1) ... [2023-08-03 21:25:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:25:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:25:59,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 21:25:59,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 21:25:59,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:25:59,174 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:25:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:25:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:25:59,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:25:59,176 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:25:59,301 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:25:59,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:25:59,546 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:25:59,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:25:59,555 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-03 21:25:59,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:59 BoogieIcfgContainer [2023-08-03 21:25:59,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:25:59,559 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:25:59,559 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:25:59,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:25:59,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:25:58" (1/3) ... [2023-08-03 21:25:59,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32873b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:59, skipping insertion in model container [2023-08-03 21:25:59,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:25:58" (2/3) ... [2023-08-03 21:25:59,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32873b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:25:59, skipping insertion in model container [2023-08-03 21:25:59,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:25:59" (3/3) ... [2023-08-03 21:25:59,564 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_71-funloop_racing_bound2.i [2023-08-03 21:25:59,571 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:25:59,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:25:59,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-03 21:25:59,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:25:59,681 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:25:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 243 transitions, 494 flow [2023-08-03 21:25:59,843 INFO L124 PetriNetUnfolderBase]: 73/375 cut-off events. [2023-08-03 21:25:59,843 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:25:59,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 375 events. 73/375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1649 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-03 21:25:59,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 243 transitions, 494 flow [2023-08-03 21:25:59,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 238 transitions, 481 flow [2023-08-03 21:25:59,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:25:59,891 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 238 transitions, 481 flow [2023-08-03 21:25:59,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 238 transitions, 481 flow [2023-08-03 21:25:59,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 238 transitions, 481 flow [2023-08-03 21:25:59,943 INFO L124 PetriNetUnfolderBase]: 72/370 cut-off events. [2023-08-03 21:25:59,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:25:59,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 370 events. 72/370 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1605 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-03 21:25:59,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 19044 [2023-08-03 21:26:02,643 INFO L134 LiptonReduction]: Checked pairs total: 28154 [2023-08-03 21:26:02,643 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-03 21:26:02,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:26:02,676 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;@2cc87b03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:02,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:26:02,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:02,683 INFO L124 PetriNetUnfolderBase]: 15/53 cut-off events. [2023-08-03 21:26:02,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:02,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:02,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 21:26:02,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:02,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1071681731, now seen corresponding path program 1 times [2023-08-03 21:26:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732766388] [2023-08-03 21:26:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:02,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732766388] [2023-08-03 21:26:02,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732766388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:02,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:02,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411954503] [2023-08-03 21:26:02,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:02,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:02,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 424 [2023-08-03 21:26:02,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:02,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:02,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 424 [2023-08-03 21:26:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:03,155 INFO L124 PetriNetUnfolderBase]: 596/1256 cut-off events. [2023-08-03 21:26:03,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:03,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 1256 events. 596/1256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7130 event pairs, 480 based on Foata normal form. 217/1239 useless extension candidates. Maximal degree in co-relation 2266. Up to 1093 conditions per place. [2023-08-03 21:26:03,160 INFO L140 encePairwiseOnDemand]: 391/424 looper letters, 22 selfloop transitions, 2 changer transitions 38/67 dead transitions. [2023-08-03 21:26:03,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 247 flow [2023-08-03 21:26:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-03 21:26:03,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290880503144654 [2023-08-03 21:26:03,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-03 21:26:03,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-03 21:26:03,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:03,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-03 21:26:03,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,193 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 673 transitions. [2023-08-03 21:26:03,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 247 flow [2023-08-03 21:26:03,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:03,198 INFO L231 Difference]: Finished difference. Result has 66 places, 29 transitions, 73 flow [2023-08-03 21:26:03,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=66, PETRI_TRANSITIONS=29} [2023-08-03 21:26:03,202 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 21:26:03,202 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 29 transitions, 73 flow [2023-08-03 21:26:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:03,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:26:03,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:03,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1941665266, now seen corresponding path program 1 times [2023-08-03 21:26:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560453128] [2023-08-03 21:26:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560453128] [2023-08-03 21:26:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560453128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085670555] [2023-08-03 21:26:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:03,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:03,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:26:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:03,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:03,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085670555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:03,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 21:26:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172836291] [2023-08-03 21:26:03,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:26:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:26:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:26:03,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 424 [2023-08-03 21:26:03,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:03,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 424 [2023-08-03 21:26:03,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:03,509 INFO L124 PetriNetUnfolderBase]: 54/139 cut-off events. [2023-08-03 21:26:03,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:03,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 377 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-08-03 21:26:03,510 INFO L140 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-03 21:26:03,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-08-03 21:26:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1200 transitions. [2023-08-03 21:26:03,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2023-08-03 21:26:03,514 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1200 transitions. [2023-08-03 21:26:03,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1200 transitions. [2023-08-03 21:26:03,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:03,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1200 transitions. [2023-08-03 21:26:03,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,522 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,522 INFO L175 Difference]: Start difference. First operand has 66 places, 29 transitions, 73 flow. Second operand 6 states and 1200 transitions. [2023-08-03 21:26:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-08-03 21:26:03,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:03,524 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-08-03 21:26:03,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-03 21:26:03,525 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-08-03 21:26:03,525 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-08-03 21:26:03,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:03,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:03,526 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:03,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:26:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:03,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:03,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -901385091, now seen corresponding path program 2 times [2023-08-03 21:26:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:03,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740025367] [2023-08-03 21:26:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:03,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740025367] [2023-08-03 21:26:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740025367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999572271] [2023-08-03 21:26:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:03,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:03,863 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) [2023-08-03 21:26:03,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:26:03,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:26:03,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:03,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:03,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:03,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:26:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999572271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:04,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 21:26:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828559520] [2023-08-03 21:26:04,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 21:26:04,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 21:26:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:26:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 424 [2023-08-03 21:26:04,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 196.30769230769232) internal successors, (2552), 13 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:04,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 424 [2023-08-03 21:26:04,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:04,142 INFO L124 PetriNetUnfolderBase]: 54/145 cut-off events. [2023-08-03 21:26:04,142 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 21:26:04,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-08-03 21:26:04,143 INFO L140 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-08-03 21:26:04,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-08-03 21:26:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:26:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:26:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2379 transitions. [2023-08-03 21:26:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675707547169811 [2023-08-03 21:26:04,149 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2379 transitions. [2023-08-03 21:26:04,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2379 transitions. [2023-08-03 21:26:04,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:04,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2379 transitions. [2023-08-03 21:26:04,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.25) internal successors, (2379), 12 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,168 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,168 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2379 transitions. [2023-08-03 21:26:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-08-03 21:26:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:04,172 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-08-03 21:26:04,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-03 21:26:04,173 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-03 21:26:04,173 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-08-03 21:26:04,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 196.30769230769232) internal successors, (2552), 13 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:04,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:04,176 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:04,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:04,381 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 [2023-08-03 21:26:04,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:04,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2050494557, now seen corresponding path program 3 times [2023-08-03 21:26:04,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:04,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467490201] [2023-08-03 21:26:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:26:04,434 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:26:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:26:04,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:26:04,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:26:04,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:26:04,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:26:04,487 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 21:26:04,488 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:26:04,489 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:26:04,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:26:04,531 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:26:04,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,610 INFO L124 PetriNetUnfolderBase]: 118/602 cut-off events. [2023-08-03 21:26:04,610 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:04,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-08-03 21:26:04,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:26:04,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:04,724 INFO L124 PetriNetUnfolderBase]: 118/602 cut-off events. [2023-08-03 21:26:04,724 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-08-03 21:26:04,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 49128 [2023-08-03 21:26:07,586 INFO L134 LiptonReduction]: Checked pairs total: 84800 [2023-08-03 21:26:07,587 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-03 21:26:07,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:26:07,594 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;@2cc87b03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:07,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:26:07,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:07,603 INFO L124 PetriNetUnfolderBase]: 56/158 cut-off events. [2023-08-03 21:26:07,603 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:26:07,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:07,605 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:07,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:07,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -914023434, now seen corresponding path program 1 times [2023-08-03 21:26:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165476284] [2023-08-03 21:26:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:07,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:07,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165476284] [2023-08-03 21:26:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165476284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:07,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:07,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:07,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204902453] [2023-08-03 21:26:07,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:07,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:07,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:07,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 551 [2023-08-03 21:26:07,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:07,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:07,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 551 [2023-08-03 21:26:07,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:09,759 INFO L124 PetriNetUnfolderBase]: 19933/30665 cut-off events. [2023-08-03 21:26:09,759 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-03 21:26:09,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58992 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 212621 event pairs, 17166 based on Foata normal form. 5463/30480 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-08-03 21:26:09,947 INFO L140 encePairwiseOnDemand]: 506/551 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-08-03 21:26:09,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-03 21:26:09,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-03 21:26:09,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-03 21:26:09,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-03 21:26:09,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:09,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-03 21:26:09,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,955 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 286 flow. Second operand 3 states and 874 transitions. [2023-08-03 21:26:09,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:09,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:09,961 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-08-03 21:26:09,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-08-03 21:26:09,963 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-03 21:26:09,963 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-08-03 21:26:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:09,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:09,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:26:09,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:09,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1596128038, now seen corresponding path program 1 times [2023-08-03 21:26:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534815953] [2023-08-03 21:26:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534815953] [2023-08-03 21:26:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534815953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906664475] [2023-08-03 21:26:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:10,026 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) [2023-08-03 21:26:10,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:26:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:10,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:10,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906664475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:10,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-03 21:26:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746220590] [2023-08-03 21:26:10,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:26:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:26:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:26:10,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 551 [2023-08-03 21:26:10,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:10,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 551 [2023-08-03 21:26:10,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:10,476 INFO L124 PetriNetUnfolderBase]: 2090/3401 cut-off events. [2023-08-03 21:26:10,477 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-03 21:26:10,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18305 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-08-03 21:26:10,493 INFO L140 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-08-03 21:26:10,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-08-03 21:26:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1554 transitions. [2023-08-03 21:26:10,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47005444646098005 [2023-08-03 21:26:10,497 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1554 transitions. [2023-08-03 21:26:10,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1554 transitions. [2023-08-03 21:26:10,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:10,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1554 transitions. [2023-08-03 21:26:10,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,506 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,507 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1554 transitions. [2023-08-03 21:26:10,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-08-03 21:26:10,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:10,508 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-08-03 21:26:10,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-03 21:26:10,509 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-08-03 21:26:10,509 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-08-03 21:26:10,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:10,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:10,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:10,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:10,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -727042826, now seen corresponding path program 2 times [2023-08-03 21:26:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:10,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960156417] [2023-08-03 21:26:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960156417] [2023-08-03 21:26:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960156417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626658652] [2023-08-03 21:26:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:10,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:10,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:10,786 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) [2023-08-03 21:26:10,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:26:10,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:26:10,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:10,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:10,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:10,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626658652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:10,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:10,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-03 21:26:10,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798818197] [2023-08-03 21:26:10,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:26:10,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:26:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-03 21:26:10,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 551 [2023-08-03 21:26:10,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:10,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:10,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 551 [2023-08-03 21:26:10,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:11,360 INFO L124 PetriNetUnfolderBase]: 2090/3407 cut-off events. [2023-08-03 21:26:11,360 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-03 21:26:11,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18331 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-08-03 21:26:11,374 INFO L140 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-08-03 21:26:11,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-08-03 21:26:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:26:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:26:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3069 transitions. [2023-08-03 21:26:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46415607985480944 [2023-08-03 21:26:11,383 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3069 transitions. [2023-08-03 21:26:11,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3069 transitions. [2023-08-03 21:26:11,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:11,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3069 transitions. [2023-08-03 21:26:11,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 255.75) internal successors, (3069), 12 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,400 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,400 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3069 transitions. [2023-08-03 21:26:11,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-08-03 21:26:11,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:11,404 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-08-03 21:26:11,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-03 21:26:11,406 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-08-03 21:26:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-08-03 21:26:11,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:11,407 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:11,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:26:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:11,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:11,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1643342454, now seen corresponding path program 3 times [2023-08-03 21:26:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:11,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939021824] [2023-08-03 21:26:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:11,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-03 21:26:11,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939021824] [2023-08-03 21:26:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939021824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305370061] [2023-08-03 21:26:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:26:11,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:11,706 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) [2023-08-03 21:26:11,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:26:11,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 21:26:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:11,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:26:11,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-03 21:26:11,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305370061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:11,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:26:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836194063] [2023-08-03 21:26:11,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:11,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:26:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:26:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:26:11,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 551 [2023-08-03 21:26:11,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:11,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:11,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 551 [2023-08-03 21:26:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:12,074 INFO L124 PetriNetUnfolderBase]: 1459/2403 cut-off events. [2023-08-03 21:26:12,074 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-03 21:26:12,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4836 conditions, 2403 events. 1459/2403 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12426 event pairs, 108 based on Foata normal form. 0/2076 useless extension candidates. Maximal degree in co-relation 4759. Up to 1665 conditions per place. [2023-08-03 21:26:12,080 INFO L140 encePairwiseOnDemand]: 547/551 looper letters, 0 selfloop transitions, 0 changer transitions 112/112 dead transitions. [2023-08-03 21:26:12,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 534 flow [2023-08-03 21:26:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:26:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:26:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1350 transitions. [2023-08-03 21:26:12,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900181488203267 [2023-08-03 21:26:12,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1350 transitions. [2023-08-03 21:26:12,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1350 transitions. [2023-08-03 21:26:12,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:12,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1350 transitions. [2023-08-03 21:26:12,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:12,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:12,093 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:12,094 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 224 flow. Second operand 5 states and 1350 transitions. [2023-08-03 21:26:12,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 534 flow [2023-08-03 21:26:12,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 485 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-03 21:26:12,096 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-03 21:26:12,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-03 21:26:12,097 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -14 predicate places. [2023-08-03 21:26:12,097 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-03 21:26:12,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:12,098 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:26:12,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:12,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:12,299 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 21:26:12,299 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:26:12,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,354 INFO L124 PetriNetUnfolderBase]: 118/602 cut-off events. [2023-08-03 21:26:12,354 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-08-03 21:26:12,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:26:12,366 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-08-03 21:26:12,416 INFO L124 PetriNetUnfolderBase]: 118/602 cut-off events. [2023-08-03 21:26:12,416 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:26:12,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-08-03 21:26:12,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 49128 [2023-08-03 21:26:15,134 INFO L134 LiptonReduction]: Checked pairs total: 85113 [2023-08-03 21:26:15,134 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-08-03 21:26:15,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:26:15,135 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;@2cc87b03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:26:15,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 21:26:15,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:26:15,138 INFO L124 PetriNetUnfolderBase]: 15/42 cut-off events. [2023-08-03 21:26:15,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:26:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:15,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:15,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:15,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 418096513, now seen corresponding path program 1 times [2023-08-03 21:26:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922557985] [2023-08-03 21:26:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922557985] [2023-08-03 21:26:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922557985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118481659] [2023-08-03 21:26:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:15,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 553 [2023-08-03 21:26:15,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:15,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:15,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 553 [2023-08-03 21:26:15,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:16,820 INFO L124 PetriNetUnfolderBase]: 19933/30665 cut-off events. [2023-08-03 21:26:16,820 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-03 21:26:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58992 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 212694 event pairs, 17166 based on Foata normal form. 5463/30480 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-08-03 21:26:17,083 INFO L140 encePairwiseOnDemand]: 508/553 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-03 21:26:17,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-03 21:26:17,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268233875828813 [2023-08-03 21:26:17,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-03 21:26:17,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-03 21:26:17,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:17,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-03 21:26:17,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,100 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 286 flow. Second operand 3 states and 874 transitions. [2023-08-03 21:26:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-03 21:26:17,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:17,104 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-08-03 21:26:17,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-03 21:26:17,107 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-03 21:26:17,107 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-08-03 21:26:17,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:17,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:17,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:26:17,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:17,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:17,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1985120422, now seen corresponding path program 1 times [2023-08-03 21:26:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503526414] [2023-08-03 21:26:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503526414] [2023-08-03 21:26:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503526414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127312695] [2023-08-03 21:26:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:17,139 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) [2023-08-03 21:26:17,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:26:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:17,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:26:17,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:17,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:17,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127312695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:17,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:17,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:26:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966058132] [2023-08-03 21:26:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:17,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:17,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:26:17,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 553 [2023-08-03 21:26:17,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:17,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:17,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 553 [2023-08-03 21:26:17,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:18,754 INFO L124 PetriNetUnfolderBase]: 19612/30394 cut-off events. [2023-08-03 21:26:18,754 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-03 21:26:18,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58717 conditions, 30394 events. 19612/30394 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 215296 event pairs, 8256 based on Foata normal form. 0/24769 useless extension candidates. Maximal degree in co-relation 58704. Up to 28177 conditions per place. [2023-08-03 21:26:18,879 INFO L140 encePairwiseOnDemand]: 550/553 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-03 21:26:18,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-08-03 21:26:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:26:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:26:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 849 transitions. [2023-08-03 21:26:18,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117540687160941 [2023-08-03 21:26:18,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 849 transitions. [2023-08-03 21:26:18,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 849 transitions. [2023-08-03 21:26:18,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:18,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 849 transitions. [2023-08-03 21:26:18,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:18,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:18,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:18,888 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 849 transitions. [2023-08-03 21:26:18,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-08-03 21:26:18,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:18,890 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-08-03 21:26:18,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-03 21:26:18,891 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-03 21:26:18,891 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-08-03 21:26:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:18,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:18,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:18,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:19,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:19,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:19,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:19,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1315449407, now seen corresponding path program 1 times [2023-08-03 21:26:19,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:19,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7749613] [2023-08-03 21:26:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7749613] [2023-08-03 21:26:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7749613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296107952] [2023-08-03 21:26:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:19,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:19,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:26:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:19,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:26:19,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:19,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:19,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296107952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:19,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:19,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-03 21:26:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493911536] [2023-08-03 21:26:19,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:19,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:26:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:26:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:26:19,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 553 [2023-08-03 21:26:19,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 253.14285714285714) internal successors, (1772), 7 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:19,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:19,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 553 [2023-08-03 21:26:19,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:20,840 INFO L124 PetriNetUnfolderBase]: 20049/30702 cut-off events. [2023-08-03 21:26:20,841 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-08-03 21:26:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59605 conditions, 30702 events. 20049/30702 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 211287 event pairs, 17166 based on Foata normal form. 3/25281 useless extension candidates. Maximal degree in co-relation 59577. Up to 28195 conditions per place. [2023-08-03 21:26:20,996 INFO L140 encePairwiseOnDemand]: 550/553 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-03 21:26:20,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-08-03 21:26:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1587 transitions. [2023-08-03 21:26:21,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783001808318264 [2023-08-03 21:26:21,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1587 transitions. [2023-08-03 21:26:21,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1587 transitions. [2023-08-03 21:26:21,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:21,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1587 transitions. [2023-08-03 21:26:21,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.5) internal successors, (1587), 6 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:21,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:21,010 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:21,010 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1587 transitions. [2023-08-03 21:26:21,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-08-03 21:26:21,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:21,014 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-08-03 21:26:21,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-03 21:26:21,016 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-08-03 21:26:21,016 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-08-03 21:26:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 253.14285714285714) internal successors, (1772), 7 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:21,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:21,017 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:21,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:21,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:21,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash 169754315, now seen corresponding path program 2 times [2023-08-03 21:26:21,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:21,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386404621] [2023-08-03 21:26:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:26:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386404621] [2023-08-03 21:26:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386404621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719811009] [2023-08-03 21:26:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:26:21,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:21,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:21,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:26:21,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 21:26:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:26:21,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-03 21:26:21,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:21,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:21,463 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:21,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:21,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 21:26:21,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:26:21,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719811009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:21,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:26:21,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-03 21:26:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713743340] [2023-08-03 21:26:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:26:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:26:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-03 21:26:21,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 553 [2023-08-03 21:26:21,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:21,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:21,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 553 [2023-08-03 21:26:21,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:24,136 INFO L124 PetriNetUnfolderBase]: 25726/40496 cut-off events. [2023-08-03 21:26:24,137 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-03 21:26:24,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78938 conditions, 40496 events. 25726/40496 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 304079 event pairs, 4083 based on Foata normal form. 0/33325 useless extension candidates. Maximal degree in co-relation 78902. Up to 27957 conditions per place. [2023-08-03 21:26:24,337 INFO L140 encePairwiseOnDemand]: 543/553 looper letters, 195 selfloop transitions, 16 changer transitions 0/229 dead transitions. [2023-08-03 21:26:24,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 229 transitions, 976 flow [2023-08-03 21:26:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:26:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:26:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1642 transitions. [2023-08-03 21:26:24,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948764315852923 [2023-08-03 21:26:24,342 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1642 transitions. [2023-08-03 21:26:24,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1642 transitions. [2023-08-03 21:26:24,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:24,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1642 transitions. [2023-08-03 21:26:24,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 273.6666666666667) internal successors, (1642), 6 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:24,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:24,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:24,350 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1642 transitions. [2023-08-03 21:26:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 229 transitions, 976 flow [2023-08-03 21:26:24,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 962 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 21:26:24,355 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-08-03 21:26:24,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-03 21:26:24,356 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-08-03 21:26:24,356 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-08-03 21:26:24,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:24,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:24,356 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:24,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:24,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 21:26:24,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:24,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2116509761, now seen corresponding path program 1 times [2023-08-03 21:26:24,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:24,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681275819] [2023-08-03 21:26:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:24,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 21:26:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681275819] [2023-08-03 21:26:24,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681275819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243724724] [2023-08-03 21:26:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:24,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:24,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:24,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:26:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:24,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 21:26:24,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:24,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:26:24,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243724724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:24,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:24,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-03 21:26:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280709422] [2023-08-03 21:26:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-03 21:26:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:24,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-03 21:26:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-03 21:26:24,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 553 [2023-08-03 21:26:24,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 248.92857142857142) internal successors, (3485), 14 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:24,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:24,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 553 [2023-08-03 21:26:24,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:27,404 INFO L124 PetriNetUnfolderBase]: 25818/40393 cut-off events. [2023-08-03 21:26:27,405 INFO L125 PetriNetUnfolderBase]: For 7557/7557 co-relation queries the response was YES. [2023-08-03 21:26:27,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86480 conditions, 40393 events. 25818/40393 cut-off events. For 7557/7557 co-relation queries the response was YES. Maximal size of possible extension queue 1182. Compared 302532 event pairs, 710 based on Foata normal form. 33/35645 useless extension candidates. Maximal degree in co-relation 86421. Up to 35243 conditions per place. [2023-08-03 21:26:27,795 INFO L140 encePairwiseOnDemand]: 547/553 looper letters, 141 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2023-08-03 21:26:27,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-08-03 21:26:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:26:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:26:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3601 transitions. [2023-08-03 21:26:27,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651252906225781 [2023-08-03 21:26:27,802 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3601 transitions. [2023-08-03 21:26:27,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3601 transitions. [2023-08-03 21:26:27,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:27,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3601 transitions. [2023-08-03 21:26:27,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 257.2142857142857) internal successors, (3601), 14 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:27,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 553.0) internal successors, (8295), 15 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 553.0) internal successors, (8295), 15 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:27,819 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3601 transitions. [2023-08-03 21:26:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-08-03 21:26:27,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:26:27,837 INFO L231 Difference]: Finished difference. Result has 122 places, 118 transitions, 427 flow [2023-08-03 21:26:27,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=122, PETRI_TRANSITIONS=118} [2023-08-03 21:26:27,838 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 35 predicate places. [2023-08-03 21:26:27,838 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 118 transitions, 427 flow [2023-08-03 21:26:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.92857142857142) internal successors, (3485), 14 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:27,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:27,839 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:27,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:28,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 21:26:28,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:28,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1652533157, now seen corresponding path program 1 times [2023-08-03 21:26:28,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:28,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809507782] [2023-08-03 21:26:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:28,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809507782] [2023-08-03 21:26:28,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809507782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55172021] [2023-08-03 21:26:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:28,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:28,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:28,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 21:26:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:28,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 21:26:28,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:28,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:28,489 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:28,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:28,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:28,538 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:28,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:34,625 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_385 (Array Int Int))) (= (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_385) |c_~#cache~0.base|) ((as const (Array Int Int)) 0))) is different from false [2023-08-03 21:26:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-03 21:26:34,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55172021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:34,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:34,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-03 21:26:34,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270587720] [2023-08-03 21:26:34,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:34,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:26:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:26:34,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-08-03 21:26:34,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 553 [2023-08-03 21:26:34,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 118 transitions, 427 flow. Second operand has 12 states, 12 states have (on average 210.91666666666666) internal successors, (2531), 12 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:34,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:34,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 553 [2023-08-03 21:26:34,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:38,879 INFO L124 PetriNetUnfolderBase]: 32825/50712 cut-off events. [2023-08-03 21:26:38,879 INFO L125 PetriNetUnfolderBase]: For 15215/15215 co-relation queries the response was YES. [2023-08-03 21:26:39,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111513 conditions, 50712 events. 32825/50712 cut-off events. For 15215/15215 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 379426 event pairs, 4815 based on Foata normal form. 0/44757 useless extension candidates. Maximal degree in co-relation 111439. Up to 30199 conditions per place. [2023-08-03 21:26:39,129 INFO L140 encePairwiseOnDemand]: 539/553 looper letters, 255 selfloop transitions, 33 changer transitions 0/304 dead transitions. [2023-08-03 21:26:39,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 304 transitions, 1517 flow [2023-08-03 21:26:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:26:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:26:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1720 transitions. [2023-08-03 21:26:39,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4443296305864118 [2023-08-03 21:26:39,133 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1720 transitions. [2023-08-03 21:26:39,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1720 transitions. [2023-08-03 21:26:39,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:39,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1720 transitions. [2023-08-03 21:26:39,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 245.71428571428572) internal successors, (1720), 7 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 553.0) internal successors, (4424), 8 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,141 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 553.0) internal successors, (4424), 8 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,142 INFO L175 Difference]: Start difference. First operand has 122 places, 118 transitions, 427 flow. Second operand 7 states and 1720 transitions. [2023-08-03 21:26:39,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 304 transitions, 1517 flow [2023-08-03 21:26:39,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 304 transitions, 1440 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-03 21:26:39,175 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 589 flow [2023-08-03 21:26:39,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=589, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2023-08-03 21:26:39,176 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 37 predicate places. [2023-08-03 21:26:39,176 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 589 flow [2023-08-03 21:26:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 210.91666666666666) internal successors, (2531), 12 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:26:39,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:39,177 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:26:39,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 21:26:39,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 21:26:39,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:26:39,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash 333264953, now seen corresponding path program 1 times [2023-08-03 21:26:39,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:39,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589832684] [2023-08-03 21:26:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589832684] [2023-08-03 21:26:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589832684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:26:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549097562] [2023-08-03 21:26:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:39,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:26:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:26:39,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:26:39,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 21:26:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:39,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 21:26:39,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:26:39,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-03 21:26:39,807 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:26:39,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:26:39,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:39,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-03 21:26:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:39,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:26:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:26:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549097562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:26:54,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:26:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-03 21:26:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654685123] [2023-08-03 21:26:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:26:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 21:26:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 21:26:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=4, NotChecked=0, Total=132 [2023-08-03 21:26:56,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:26:58,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:00,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:02,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:04,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:06,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:08,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:10,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:12,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:14,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:16,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:18,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:20,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:22,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:24,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:26,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-03 21:27:26,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 553 [2023-08-03 21:27:26,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 589 flow. Second operand has 12 states, 12 states have (on average 211.08333333333334) internal successors, (2533), 12 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:26,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:27:26,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 553 [2023-08-03 21:27:26,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:27:31,761 INFO L124 PetriNetUnfolderBase]: 48513/74508 cut-off events. [2023-08-03 21:27:31,761 INFO L125 PetriNetUnfolderBase]: For 44945/44945 co-relation queries the response was YES. [2023-08-03 21:27:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181432 conditions, 74508 events. 48513/74508 cut-off events. For 44945/44945 co-relation queries the response was YES. Maximal size of possible extension queue 1925. Compared 564557 event pairs, 9764 based on Foata normal form. 0/68891 useless extension candidates. Maximal degree in co-relation 170897. Up to 38391 conditions per place. [2023-08-03 21:27:32,176 INFO L140 encePairwiseOnDemand]: 541/553 looper letters, 273 selfloop transitions, 49 changer transitions 0/338 dead transitions. [2023-08-03 21:27:32,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 338 transitions, 1916 flow [2023-08-03 21:27:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:27:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:27:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1722 transitions. [2023-08-03 21:27:32,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448462929475588 [2023-08-03 21:27:32,180 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1722 transitions. [2023-08-03 21:27:32,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1722 transitions. [2023-08-03 21:27:32,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:27:32,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1722 transitions. [2023-08-03 21:27:32,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:32,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 553.0) internal successors, (4424), 8 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:32,187 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 553.0) internal successors, (4424), 8 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:32,187 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 589 flow. Second operand 7 states and 1722 transitions. [2023-08-03 21:27:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 338 transitions, 1916 flow [2023-08-03 21:27:32,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 338 transitions, 1916 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:27:32,455 INFO L231 Difference]: Finished difference. Result has 134 places, 164 transitions, 989 flow [2023-08-03 21:27:32,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=989, PETRI_PLACES=134, PETRI_TRANSITIONS=164} [2023-08-03 21:27:32,455 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 47 predicate places. [2023-08-03 21:27:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 164 transitions, 989 flow [2023-08-03 21:27:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.08333333333334) internal successors, (2533), 12 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:27:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:27:32,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 21:27:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 21:27:32,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:27:32,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:27:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash -714090982, now seen corresponding path program 1 times [2023-08-03 21:27:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:27:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391223637] [2023-08-03 21:27:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:27:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:27:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:27:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:27:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:27:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391223637] [2023-08-03 21:27:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391223637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:27:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:27:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:27:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676288237] [2023-08-03 21:27:32,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:27:32,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:27:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:27:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:27:32,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:27:33,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 553 [2023-08-03 21:27:33,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 164 transitions, 989 flow. Second operand has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:33,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:27:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 553 [2023-08-03 21:27:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:27:42,591 INFO L124 PetriNetUnfolderBase]: 79342/126247 cut-off events. [2023-08-03 21:27:42,591 INFO L125 PetriNetUnfolderBase]: For 137140/137185 co-relation queries the response was YES. [2023-08-03 21:27:43,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332888 conditions, 126247 events. 79342/126247 cut-off events. For 137140/137185 co-relation queries the response was YES. Maximal size of possible extension queue 2718. Compared 1074614 event pairs, 21124 based on Foata normal form. 9182/127489 useless extension candidates. Maximal degree in co-relation 313123. Up to 67992 conditions per place. [2023-08-03 21:27:43,624 INFO L140 encePairwiseOnDemand]: 524/553 looper letters, 294 selfloop transitions, 43 changer transitions 0/350 dead transitions. [2023-08-03 21:27:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 350 transitions, 2831 flow [2023-08-03 21:27:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:27:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:27:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1337 transitions. [2023-08-03 21:27:43,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835443037974684 [2023-08-03 21:27:43,627 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1337 transitions. [2023-08-03 21:27:43,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1337 transitions. [2023-08-03 21:27:43,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:27:43,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1337 transitions. [2023-08-03 21:27:43,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.4) internal successors, (1337), 5 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:43,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 553.0) internal successors, (3318), 6 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:43,633 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 553.0) internal successors, (3318), 6 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:43,633 INFO L175 Difference]: Start difference. First operand has 134 places, 164 transitions, 989 flow. Second operand 5 states and 1337 transitions. [2023-08-03 21:27:43,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 350 transitions, 2831 flow [2023-08-03 21:27:44,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 350 transitions, 2831 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:27:44,281 INFO L231 Difference]: Finished difference. Result has 139 places, 194 transitions, 1222 flow [2023-08-03 21:27:44,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1222, PETRI_PLACES=139, PETRI_TRANSITIONS=194} [2023-08-03 21:27:44,282 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 52 predicate places. [2023-08-03 21:27:44,282 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 194 transitions, 1222 flow [2023-08-03 21:27:44,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:44,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:27:44,282 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:27:44,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 21:27:44,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:27:44,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:27:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -185361918, now seen corresponding path program 1 times [2023-08-03 21:27:44,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:27:44,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616838394] [2023-08-03 21:27:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:27:44,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:27:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:27:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:27:44,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:27:44,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616838394] [2023-08-03 21:27:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616838394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:27:44,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:27:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:27:44,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667768658] [2023-08-03 21:27:44,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:27:44,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:27:44,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:27:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:27:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:27:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 553 [2023-08-03 21:27:44,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 194 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:27:44,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:27:44,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 553 [2023-08-03 21:27:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:28:08,072 INFO L124 PetriNetUnfolderBase]: 158224/254209 cut-off events. [2023-08-03 21:28:08,072 INFO L125 PetriNetUnfolderBase]: For 357953/358810 co-relation queries the response was YES. [2023-08-03 21:28:09,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789329 conditions, 254209 events. 158224/254209 cut-off events. For 357953/358810 co-relation queries the response was YES. Maximal size of possible extension queue 6160. Compared 2405812 event pairs, 56974 based on Foata normal form. 2969/237970 useless extension candidates. Maximal degree in co-relation 747350. Up to 111140 conditions per place. [2023-08-03 21:28:10,258 INFO L140 encePairwiseOnDemand]: 532/553 looper letters, 467 selfloop transitions, 52 changer transitions 0/537 dead transitions. [2023-08-03 21:28:10,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 537 transitions, 4502 flow [2023-08-03 21:28:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:28:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:28:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1616 transitions. [2023-08-03 21:28:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487040385774563 [2023-08-03 21:28:10,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1616 transitions. [2023-08-03 21:28:10,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1616 transitions. [2023-08-03 21:28:10,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:28:10,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1616 transitions. [2023-08-03 21:28:10,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.3333333333333) internal successors, (1616), 6 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:10,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:10,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:10,269 INFO L175 Difference]: Start difference. First operand has 139 places, 194 transitions, 1222 flow. Second operand 6 states and 1616 transitions. [2023-08-03 21:28:10,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 537 transitions, 4502 flow [2023-08-03 21:28:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 537 transitions, 4501 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:28:11,826 INFO L231 Difference]: Finished difference. Result has 146 places, 242 transitions, 1750 flow [2023-08-03 21:28:11,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1750, PETRI_PLACES=146, PETRI_TRANSITIONS=242} [2023-08-03 21:28:11,827 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 59 predicate places. [2023-08-03 21:28:11,827 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 242 transitions, 1750 flow [2023-08-03 21:28:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:11,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:28:11,828 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:28:11,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 21:28:11,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:28:11,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:28:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1845090044, now seen corresponding path program 2 times [2023-08-03 21:28:11,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:28:11,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204491118] [2023-08-03 21:28:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:28:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:28:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:28:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:28:12,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:28:12,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204491118] [2023-08-03 21:28:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204491118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:28:12,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:28:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:28:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629316945] [2023-08-03 21:28:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:28:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:28:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:28:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:28:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:28:12,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 553 [2023-08-03 21:28:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 242 transitions, 1750 flow. Second operand has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:28:12,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:28:12,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 553 [2023-08-03 21:28:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:29:12,612 INFO L124 PetriNetUnfolderBase]: 317227/514603 cut-off events. [2023-08-03 21:29:12,612 INFO L125 PetriNetUnfolderBase]: For 1023174/1025037 co-relation queries the response was YES. [2023-08-03 21:29:15,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1788177 conditions, 514603 events. 317227/514603 cut-off events. For 1023174/1025037 co-relation queries the response was YES. Maximal size of possible extension queue 13107. Compared 5360705 event pairs, 118189 based on Foata normal form. 4199/477334 useless extension candidates. Maximal degree in co-relation 1684281. Up to 243010 conditions per place. [2023-08-03 21:29:17,526 INFO L140 encePairwiseOnDemand]: 544/553 looper letters, 590 selfloop transitions, 34 changer transitions 0/642 dead transitions. [2023-08-03 21:29:17,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 642 transitions, 5909 flow [2023-08-03 21:29:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:29:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:29:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1694 transitions. [2023-08-03 21:29:17,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510548523206751 [2023-08-03 21:29:17,529 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1694 transitions. [2023-08-03 21:29:17,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1694 transitions. [2023-08-03 21:29:17,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:29:17,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1694 transitions. [2023-08-03 21:29:17,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.3333333333333) internal successors, (1694), 6 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:17,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:17,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:17,535 INFO L175 Difference]: Start difference. First operand has 146 places, 242 transitions, 1750 flow. Second operand 6 states and 1694 transitions. [2023-08-03 21:29:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 642 transitions, 5909 flow [2023-08-03 21:29:28,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 642 transitions, 5896 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:29:28,835 INFO L231 Difference]: Finished difference. Result has 152 places, 269 transitions, 2121 flow [2023-08-03 21:29:28,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2121, PETRI_PLACES=152, PETRI_TRANSITIONS=269} [2023-08-03 21:29:28,836 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 65 predicate places. [2023-08-03 21:29:28,836 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 269 transitions, 2121 flow [2023-08-03 21:29:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:28,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:29:28,836 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:29:28,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 21:29:28,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:29:28,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:29:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1113484456, now seen corresponding path program 1 times [2023-08-03 21:29:28,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:29:28,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639860287] [2023-08-03 21:29:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:29:28,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:29:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:29:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:29:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:29:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639860287] [2023-08-03 21:29:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639860287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:29:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653060258] [2023-08-03 21:29:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:29:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:29:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:29:29,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:29:29,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 21:29:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:29:29,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-03 21:29:29,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:29:29,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-03 21:29:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:29:29,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 21:29:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:29:29,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 21:29:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:29:29,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:29:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653060258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:29:29,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:29:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-03 21:29:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791667490] [2023-08-03 21:29:29,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:29:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:29:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:29:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:29:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:29:29,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 553 [2023-08-03 21:29:29,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 269 transitions, 2121 flow. Second operand has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:29:29,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:29:29,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 553 [2023-08-03 21:29:29,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:30:42,710 INFO L124 PetriNetUnfolderBase]: 360113/584604 cut-off events. [2023-08-03 21:30:42,710 INFO L125 PetriNetUnfolderBase]: For 1423555/1426261 co-relation queries the response was YES. [2023-08-03 21:30:45,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149575 conditions, 584604 events. 360113/584604 cut-off events. For 1423555/1426261 co-relation queries the response was YES. Maximal size of possible extension queue 15531. Compared 6201765 event pairs, 135382 based on Foata normal form. 772/538671 useless extension candidates. Maximal degree in co-relation 2029094. Up to 239887 conditions per place. [2023-08-03 21:30:48,362 INFO L140 encePairwiseOnDemand]: 545/553 looper letters, 576 selfloop transitions, 50 changer transitions 0/644 dead transitions. [2023-08-03 21:30:48,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 644 transitions, 6236 flow [2023-08-03 21:30:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:30:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:30:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1634 transitions. [2023-08-03 21:30:48,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4924653405666064 [2023-08-03 21:30:48,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1634 transitions. [2023-08-03 21:30:48,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1634 transitions. [2023-08-03 21:30:48,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:30:48,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1634 transitions. [2023-08-03 21:30:48,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.3333333333333) internal successors, (1634), 6 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:30:48,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:30:48,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:30:48,369 INFO L175 Difference]: Start difference. First operand has 152 places, 269 transitions, 2121 flow. Second operand 6 states and 1634 transitions. [2023-08-03 21:30:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 644 transitions, 6236 flow [2023-08-03 21:31:02,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 644 transitions, 6235 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:31:02,055 INFO L231 Difference]: Finished difference. Result has 158 places, 292 transitions, 2533 flow [2023-08-03 21:31:02,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2533, PETRI_PLACES=158, PETRI_TRANSITIONS=292} [2023-08-03 21:31:02,056 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 71 predicate places. [2023-08-03 21:31:02,056 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 292 transitions, 2533 flow [2023-08-03 21:31:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:02,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:31:02,056 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:31:02,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 21:31:02,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:31:02,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:31:02,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:31:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2124388590, now seen corresponding path program 3 times [2023-08-03 21:31:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:31:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253260273] [2023-08-03 21:31:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:31:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:31:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:31:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-03 21:31:02,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:31:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253260273] [2023-08-03 21:31:02,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253260273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:31:02,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:31:02,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:31:02,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978131843] [2023-08-03 21:31:02,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:31:02,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:31:02,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:31:02,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:31:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:31:02,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 553 [2023-08-03 21:31:02,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 292 transitions, 2533 flow. Second operand has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:31:02,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:31:02,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 553 [2023-08-03 21:31:02,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:34,816 INFO L124 PetriNetUnfolderBase]: 455223/743460 cut-off events. [2023-08-03 21:32:34,816 INFO L125 PetriNetUnfolderBase]: For 2231812/2235903 co-relation queries the response was YES. [2023-08-03 21:32:39,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849177 conditions, 743460 events. 455223/743460 cut-off events. For 2231812/2235903 co-relation queries the response was YES. Maximal size of possible extension queue 20311. Compared 8152522 event pairs, 189923 based on Foata normal form. 1554/684132 useless extension candidates. Maximal degree in co-relation 2691549. Up to 289253 conditions per place. [2023-08-03 21:32:43,929 INFO L140 encePairwiseOnDemand]: 545/553 looper letters, 724 selfloop transitions, 55 changer transitions 0/797 dead transitions. [2023-08-03 21:32:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 797 transitions, 8248 flow [2023-08-03 21:32:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:32:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:32:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1697 transitions. [2023-08-03 21:32:43,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114526823387583 [2023-08-03 21:32:43,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1697 transitions. [2023-08-03 21:32:43,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1697 transitions. [2023-08-03 21:32:43,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:43,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1697 transitions. [2023-08-03 21:32:43,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.8333333333333) internal successors, (1697), 6 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:32:43,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:32:43,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 553.0) internal successors, (3871), 7 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:32:43,938 INFO L175 Difference]: Start difference. First operand has 158 places, 292 transitions, 2533 flow. Second operand 6 states and 1697 transitions. [2023-08-03 21:32:43,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 797 transitions, 8248 flow [2023-08-03 21:33:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 797 transitions, 8191 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-03 21:33:22,304 INFO L231 Difference]: Finished difference. Result has 164 places, 328 transitions, 3225 flow [2023-08-03 21:33:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3225, PETRI_PLACES=164, PETRI_TRANSITIONS=328} [2023-08-03 21:33:22,305 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 77 predicate places. [2023-08-03 21:33:22,306 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 328 transitions, 3225 flow [2023-08-03 21:33:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:33:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:33:22,309 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:33:22,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-03 21:33:22,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-03 21:33:22,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:33:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash -173414146, now seen corresponding path program 2 times [2023-08-03 21:33:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:33:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931106992] [2023-08-03 21:33:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:33:22,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:33:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:33:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-03 21:33:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:33:22,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931106992] [2023-08-03 21:33:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931106992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:33:22,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:33:22,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:33:22,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146236092] [2023-08-03 21:33:22,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:33:22,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:33:22,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:33:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:33:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:33:22,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 553 [2023-08-03 21:33:22,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 328 transitions, 3225 flow. Second operand has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:33:22,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:33:22,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 553 [2023-08-03 21:33:22,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand