/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:40:35,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:40:35,208 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:40:35,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:40:35,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:40:35,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:40:35,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:40:35,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:40:35,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:40:35,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:40:35,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:40:35,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:40:35,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:40:35,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:40:35,240 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:40:35,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:40:35,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:40:35,240 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:40:35,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:40:35,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:40:35,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:40:35,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:40:35,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:40:35,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:40:35,242 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:40:35,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:40:35,242 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:40:35,242 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:40:35,243 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:40:35,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:40:35,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:40:35,244 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:40:35,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:40:35,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:40:35,245 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:40:35,245 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:40:35,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:40:35,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:40:35,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:40:35,434 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:40:35,434 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:40:35,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c [2023-08-04 08:40:36,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:40:36,689 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:40:36,689 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c [2023-08-04 08:40:36,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fcc7c93/b7f08d2fdba341c5b894ca4935831b4a/FLAG1e2d313aa [2023-08-04 08:40:36,706 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fcc7c93/b7f08d2fdba341c5b894ca4935831b4a [2023-08-04 08:40:36,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:40:36,708 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:40:36,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:40:36,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:40:36,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:40:36,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20958f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36, skipping insertion in model container [2023-08-04 08:40:36,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,730 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:40:36,854 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c[2359,2372] [2023-08-04 08:40:36,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:40:36,864 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:40:36,878 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c[2359,2372] [2023-08-04 08:40:36,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:40:36,887 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:40:36,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36 WrapperNode [2023-08-04 08:40:36,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:40:36,889 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:40:36,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:40:36,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:40:36,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,927 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 121 [2023-08-04 08:40:36,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:40:36,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:40:36,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:40:36,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:40:36,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:40:36,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:40:36,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:40:36,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:40:36,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (1/1) ... [2023-08-04 08:40:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:40:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:36,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:40:36,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:40:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:40:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:40:37,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:40:37,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:40:37,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:40:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:40:37,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:40:37,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:40:37,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:40:37,026 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:40:37,109 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:40:37,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:40:37,326 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:40:37,331 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:40:37,331 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 08:40:37,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:40:37 BoogieIcfgContainer [2023-08-04 08:40:37,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:40:37,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:40:37,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:40:37,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:40:37,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:40:36" (1/3) ... [2023-08-04 08:40:37,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d3f4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:40:37, skipping insertion in model container [2023-08-04 08:40:37,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:36" (2/3) ... [2023-08-04 08:40:37,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d3f4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:40:37, skipping insertion in model container [2023-08-04 08:40:37,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:40:37" (3/3) ... [2023-08-04 08:40:37,338 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_mult-dist.wvr_bound2.c [2023-08-04 08:40:37,343 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:40:37,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:40:37,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:40:37,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:40:37,407 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:40:37,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,526 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 08:40:37,526 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:40:37,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 08:40:37,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:37,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:37,631 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 08:40:37,631 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:40:37,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 08:40:37,647 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 08:40:40,108 INFO L134 LiptonReduction]: Checked pairs total: 7970 [2023-08-04 08:40:40,108 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-04 08:40:40,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:40:40,125 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;@6e02c458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:40,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:40:40,132 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:40,132 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 08:40:40,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:40:40,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:40,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:40,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:40,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 618101613, now seen corresponding path program 1 times [2023-08-04 08:40:40,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:40,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867435039] [2023-08-04 08:40:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:40,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867435039] [2023-08-04 08:40:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867435039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:40,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:40,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:40:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497805764] [2023-08-04 08:40:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:40,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:40:40,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:40,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:40,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:40,605 INFO L124 PetriNetUnfolderBase]: 2188/3066 cut-off events. [2023-08-04 08:40:40,605 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-04 08:40:40,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 3066 events. 2188/3066 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14061 event pairs, 825 based on Foata normal form. 0/1753 useless extension candidates. Maximal degree in co-relation 4980. Up to 2906 conditions per place. [2023-08-04 08:40:40,661 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 37 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2023-08-04 08:40:40,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 220 flow [2023-08-04 08:40:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-04 08:40:40,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2023-08-04 08:40:40,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-04 08:40:40,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-04 08:40:40,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:40,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-04 08:40:40,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,693 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 136 flow. Second operand 3 states and 420 transitions. [2023-08-04 08:40:40,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 220 flow [2023-08-04 08:40:40,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:40,699 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 130 flow [2023-08-04 08:40:40,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-04 08:40:40,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 08:40:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 130 flow [2023-08-04 08:40:40,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:40,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:40:40,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:40,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 192064763, now seen corresponding path program 1 times [2023-08-04 08:40:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:40,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880404478] [2023-08-04 08:40:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:40,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:40,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880404478] [2023-08-04 08:40:40,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880404478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628812155] [2023-08-04 08:40:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:40,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:40,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:40,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:40:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:40,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:40,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:40,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628812155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:40,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:40,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123418928] [2023-08-04 08:40:40,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:40,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:40,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:40,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:40,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:40,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:41,088 INFO L124 PetriNetUnfolderBase]: 2096/2909 cut-off events. [2023-08-04 08:40:41,088 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-08-04 08:40:41,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5879 conditions, 2909 events. 2096/2909 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12787 event pairs, 970 based on Foata normal form. 0/1660 useless extension candidates. Maximal degree in co-relation 4671. Up to 2755 conditions per place. [2023-08-04 08:40:41,101 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 39 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-04 08:40:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 224 flow [2023-08-04 08:40:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 08:40:41,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514041514041514 [2023-08-04 08:40:41,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 08:40:41,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 08:40:41,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:41,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 08:40:41,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,112 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 130 flow. Second operand 3 states and 421 transitions. [2023-08-04 08:40:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 224 flow [2023-08-04 08:40:41,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:40:41,116 INFO L231 Difference]: Finished difference. Result has 39 places, 43 transitions, 122 flow [2023-08-04 08:40:41,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=43} [2023-08-04 08:40:41,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-04 08:40:41,117 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 43 transitions, 122 flow [2023-08-04 08:40:41,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:41,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:41,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:41,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:41,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1615078077, now seen corresponding path program 1 times [2023-08-04 08:40:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438745628] [2023-08-04 08:40:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:41,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:41,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438745628] [2023-08-04 08:40:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438745628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21939445] [2023-08-04 08:40:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:41,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:41,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:41,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:40:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:41,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:41,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:41,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21939445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:41,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:41,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:41,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468398782] [2023-08-04 08:40:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:41,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:41,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:41,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:41,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:41,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:41,696 INFO L124 PetriNetUnfolderBase]: 2087/2900 cut-off events. [2023-08-04 08:40:41,696 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 08:40:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2900 events. 2087/2900 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12827 event pairs, 789 based on Foata normal form. 0/1675 useless extension candidates. Maximal degree in co-relation 2270. Up to 2636 conditions per place. [2023-08-04 08:40:41,710 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 41 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 08:40:41,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 224 flow [2023-08-04 08:40:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-04 08:40:41,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2023-08-04 08:40:41,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-04 08:40:41,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-04 08:40:41,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:41,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-04 08:40:41,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,715 INFO L175 Difference]: Start difference. First operand has 39 places, 43 transitions, 122 flow. Second operand 3 states and 423 transitions. [2023-08-04 08:40:41,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 224 flow [2023-08-04 08:40:41,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:40:41,719 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 126 flow [2023-08-04 08:40:41,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-08-04 08:40:41,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-04 08:40:41,720 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 126 flow [2023-08-04 08:40:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:41,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:41,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:40:41,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:40:41,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:41,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -170228010, now seen corresponding path program 1 times [2023-08-04 08:40:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:41,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230599411] [2023-08-04 08:40:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230599411] [2023-08-04 08:40:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230599411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179542048] [2023-08-04 08:40:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:42,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:42,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:42,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:42,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:40:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:42,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:42,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179542048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:42,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:42,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279344124] [2023-08-04 08:40:42,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:42,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:42,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:42,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:42,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:42,270 INFO L124 PetriNetUnfolderBase]: 1349/1919 cut-off events. [2023-08-04 08:40:42,270 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 08:40:42,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3972 conditions, 1919 events. 1349/1919 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7906 event pairs, 492 based on Foata normal form. 0/1144 useless extension candidates. Maximal degree in co-relation 1654. Up to 1481 conditions per place. [2023-08-04 08:40:42,279 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 46 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 08:40:42,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 250 flow [2023-08-04 08:40:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-04 08:40:42,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2023-08-04 08:40:42,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:42,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,287 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 126 flow. Second operand 3 states and 427 transitions. [2023-08-04 08:40:42,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 250 flow [2023-08-04 08:40:42,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:40:42,289 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 134 flow [2023-08-04 08:40:42,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-08-04 08:40:42,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-04 08:40:42,291 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 134 flow [2023-08-04 08:40:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:42,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:42,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:40:42,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:42,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:42,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 999054099, now seen corresponding path program 1 times [2023-08-04 08:40:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:42,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254573272] [2023-08-04 08:40:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:42,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254573272] [2023-08-04 08:40:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254573272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880226863] [2023-08-04 08:40:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:42,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:42,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:40:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:42,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:40:42,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880226863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:42,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613206649] [2023-08-04 08:40:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:42,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:42,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:42,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:42,785 INFO L124 PetriNetUnfolderBase]: 1120/1613 cut-off events. [2023-08-04 08:40:42,786 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 08:40:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3455 conditions, 1613 events. 1120/1613 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6358 event pairs, 454 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1414. Up to 1277 conditions per place. [2023-08-04 08:40:42,792 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 08:40:42,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 260 flow [2023-08-04 08:40:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-04 08:40:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2023-08-04 08:40:42,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:42,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-04 08:40:42,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,797 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 134 flow. Second operand 3 states and 427 transitions. [2023-08-04 08:40:42,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 260 flow [2023-08-04 08:40:42,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:42,799 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 144 flow [2023-08-04 08:40:42,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-08-04 08:40:42,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-04 08:40:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 144 flow [2023-08-04 08:40:42,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:42,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:42,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:43,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:43,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash 764330152, now seen corresponding path program 1 times [2023-08-04 08:40:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:43,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734886809] [2023-08-04 08:40:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:43,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:40:43,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:43,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734886809] [2023-08-04 08:40:43,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734886809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:43,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233574260] [2023-08-04 08:40:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:43,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:43,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:43,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:40:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:43,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:43,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:40:43,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:43,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233574260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:43,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:43,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:40:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63065880] [2023-08-04 08:40:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:43,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 08:40:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:43,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 08:40:43,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:43,244 INFO L124 PetriNetUnfolderBase]: 1107/1593 cut-off events. [2023-08-04 08:40:43,244 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 08:40:43,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 1593 events. 1107/1593 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6277 event pairs, 527 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 2556. Up to 1485 conditions per place. [2023-08-04 08:40:43,250 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 41 selfloop transitions, 2 changer transitions 3/52 dead transitions. [2023-08-04 08:40:43,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 250 flow [2023-08-04 08:40:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-04 08:40:43,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2023-08-04 08:40:43,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-04 08:40:43,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-04 08:40:43,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:43,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-04 08:40:43,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,254 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 144 flow. Second operand 3 states and 423 transitions. [2023-08-04 08:40:43,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 250 flow [2023-08-04 08:40:43,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:43,256 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 142 flow [2023-08-04 08:40:43,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-04 08:40:43,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-04 08:40:43,257 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 142 flow [2023-08-04 08:40:43,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:43,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:43,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:40:43,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:43,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:43,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1938614402, now seen corresponding path program 1 times [2023-08-04 08:40:43,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338744745] [2023-08-04 08:40:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:40:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338744745] [2023-08-04 08:40:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338744745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533851994] [2023-08-04 08:40:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:43,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:43,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:43,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:40:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:43,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:43,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:40:43,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:40:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533851994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:43,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:40:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019745766] [2023-08-04 08:40:43,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:43,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:43,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 273 [2023-08-04 08:40:43,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 273 [2023-08-04 08:40:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:43,655 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 08:40:43,655 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:40:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 19 events. 8/19 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 1 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 40. Up to 13 conditions per place. [2023-08-04 08:40:43,655 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 08:40:43,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 10 transitions, 42 flow [2023-08-04 08:40:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2023-08-04 08:40:43,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2023-08-04 08:40:43,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2023-08-04 08:40:43,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2023-08-04 08:40:43,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:43,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2023-08-04 08:40:43,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,659 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 142 flow. Second operand 4 states and 510 transitions. [2023-08-04 08:40:43,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 10 transitions, 42 flow [2023-08-04 08:40:43,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:43,659 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 08:40:43,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 08:40:43,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -23 predicate places. [2023-08-04 08:40:43,660 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 08:40:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:43,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:40:43,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:43,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:43,867 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:43,869 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:40:43,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,896 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 08:40:43,896 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:40:43,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 08:40:43,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:43,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 08:40:43,924 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 08:40:43,924 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:40:43,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 08:40:43,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 08:40:45,998 INFO L134 LiptonReduction]: Checked pairs total: 7970 [2023-08-04 08:40:45,999 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-04 08:40:46,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:40:46,000 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;@6e02c458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:46,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:40:46,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:46,002 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 08:40:46,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:40:46,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:46,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:40:46,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:40:46,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1108619724, now seen corresponding path program 1 times [2023-08-04 08:40:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:46,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022792565] [2023-08-04 08:40:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:46,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:40:46,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:40:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:40:46,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:40:46,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:40:46,056 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:40:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:40:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:40:46,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:40:46,056 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:40:46,057 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:40:46,057 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:40:46,057 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:40:46,084 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:40:46,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,339 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 08:40:46,339 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:40:46,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33161 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 08:40:46,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:46,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 08:40:46,650 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 08:40:46,650 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:40:46,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33161 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 08:40:46,733 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 08:40:48,954 INFO L134 LiptonReduction]: Checked pairs total: 24284 [2023-08-04 08:40:48,954 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-04 08:40:48,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:40:48,956 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;@6e02c458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:48,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:40:48,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:48,958 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 08:40:48,958 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:40:48,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:48,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:48,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:48,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:48,959 INFO L85 PathProgramCache]: Analyzing trace with hash 360978882, now seen corresponding path program 1 times [2023-08-04 08:40:48,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:48,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878482573] [2023-08-04 08:40:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:48,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878482573] [2023-08-04 08:40:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878482573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:40:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741584009] [2023-08-04 08:40:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:40:49,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:40:49,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:49,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:49,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:40:49,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:07,716 INFO L124 PetriNetUnfolderBase]: 282558/337063 cut-off events. [2023-08-04 08:41:07,716 INFO L125 PetriNetUnfolderBase]: For 35994/35994 co-relation queries the response was YES. [2023-08-04 08:41:08,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685339 conditions, 337063 events. 282558/337063 cut-off events. For 35994/35994 co-relation queries the response was YES. Maximal size of possible extension queue 6317. Compared 1584945 event pairs, 121223 based on Foata normal form. 0/188806 useless extension candidates. Maximal degree in co-relation 224681. Up to 327391 conditions per place. [2023-08-04 08:41:09,845 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 57 selfloop transitions, 2 changer transitions 3/74 dead transitions. [2023-08-04 08:41:09,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 356 flow [2023-08-04 08:41:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-04 08:41:09,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2023-08-04 08:41:09,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-04 08:41:09,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-04 08:41:09,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:09,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-04 08:41:09,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:09,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:09,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:09,853 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 232 flow. Second operand 3 states and 520 transitions. [2023-08-04 08:41:09,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 356 flow [2023-08-04 08:41:09,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:41:09,894 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 224 flow [2023-08-04 08:41:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=62, PETRI_TRANSITIONS=68} [2023-08-04 08:41:09,895 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-04 08:41:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 224 flow [2023-08-04 08:41:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:09,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:09,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:41:09,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:09,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1120208257, now seen corresponding path program 1 times [2023-08-04 08:41:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937874981] [2023-08-04 08:41:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:41:09,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937874981] [2023-08-04 08:41:09,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937874981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133388609] [2023-08-04 08:41:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:09,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:09,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:41:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:09,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:09,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:41:10,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133388609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:10,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:10,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758385003] [2023-08-04 08:41:10,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:10,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:10,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:10,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:41:10,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:10,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:10,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:41:10,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:28,699 INFO L124 PetriNetUnfolderBase]: 278800/332180 cut-off events. [2023-08-04 08:41:28,699 INFO L125 PetriNetUnfolderBase]: For 34547/34547 co-relation queries the response was YES. [2023-08-04 08:41:29,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675355 conditions, 332180 events. 278800/332180 cut-off events. For 34547/34547 co-relation queries the response was YES. Maximal size of possible extension queue 6460. Compared 1566621 event pairs, 119881 based on Foata normal form. 0/185952 useless extension candidates. Maximal degree in co-relation 675323. Up to 322812 conditions per place. [2023-08-04 08:41:30,920 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 62 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 08:41:30,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 368 flow [2023-08-04 08:41:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-04 08:41:30,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188492063492064 [2023-08-04 08:41:30,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-04 08:41:30,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-04 08:41:30,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:30,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-04 08:41:30,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:30,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:30,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:30,928 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 224 flow. Second operand 3 states and 523 transitions. [2023-08-04 08:41:30,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 368 flow [2023-08-04 08:41:31,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:41:31,017 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 222 flow [2023-08-04 08:41:31,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2023-08-04 08:41:31,018 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2023-08-04 08:41:31,019 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 222 flow [2023-08-04 08:41:31,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:31,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:31,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:31,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:31,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:31,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2098866207, now seen corresponding path program 1 times [2023-08-04 08:41:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:31,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887955974] [2023-08-04 08:41:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:31,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:41:31,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:31,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887955974] [2023-08-04 08:41:31,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887955974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:31,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91015797] [2023-08-04 08:41:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:31,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:31,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:31,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:41:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:31,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:31,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:41:31,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:31,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91015797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:31,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:31,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840193485] [2023-08-04 08:41:31,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:31,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:41:31,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:31,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:31,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:41:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:48,901 INFO L124 PetriNetUnfolderBase]: 278202/333664 cut-off events. [2023-08-04 08:41:48,902 INFO L125 PetriNetUnfolderBase]: For 16501/16501 co-relation queries the response was YES. [2023-08-04 08:41:49,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675991 conditions, 333664 events. 278202/333664 cut-off events. For 16501/16501 co-relation queries the response was YES. Maximal size of possible extension queue 7023. Compared 1658294 event pairs, 118847 based on Foata normal form. 0/187951 useless extension candidates. Maximal degree in co-relation 233318. Up to 318912 conditions per place. [2023-08-04 08:41:50,936 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 67 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 08:41:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 384 flow [2023-08-04 08:41:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-04 08:41:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228174603174603 [2023-08-04 08:41:50,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-04 08:41:50,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-04 08:41:50,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:50,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-04 08:41:50,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:50,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:50,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:50,941 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 222 flow. Second operand 3 states and 527 transitions. [2023-08-04 08:41:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 384 flow [2023-08-04 08:41:50,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:50,949 INFO L231 Difference]: Finished difference. Result has 60 places, 70 transitions, 232 flow [2023-08-04 08:41:50,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=70} [2023-08-04 08:41:50,949 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2023-08-04 08:41:50,949 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 70 transitions, 232 flow [2023-08-04 08:41:50,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:50,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:50,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:50,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:41:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:41:51,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:51,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1645784426, now seen corresponding path program 1 times [2023-08-04 08:41:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356665804] [2023-08-04 08:41:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:41:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:51,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356665804] [2023-08-04 08:41:51,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356665804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801579658] [2023-08-04 08:41:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:51,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:51,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:51,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:41:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:51,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:51,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:41:51,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801579658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:51,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:51,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544208113] [2023-08-04 08:41:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:51,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:51,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:51,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:41:51,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 70 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:51,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:51,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:41:51,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:07,101 INFO L124 PetriNetUnfolderBase]: 246597/297046 cut-off events. [2023-08-04 08:42:07,101 INFO L125 PetriNetUnfolderBase]: For 13326/13326 co-relation queries the response was YES. [2023-08-04 08:42:08,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606623 conditions, 297046 events. 246597/297046 cut-off events. For 13326/13326 co-relation queries the response was YES. Maximal size of possible extension queue 6223. Compared 1487138 event pairs, 95714 based on Foata normal form. 0/169876 useless extension candidates. Maximal degree in co-relation 225285. Up to 240765 conditions per place. [2023-08-04 08:42:09,865 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 08:42:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 443 flow [2023-08-04 08:42:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-04 08:42:09,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307539682539683 [2023-08-04 08:42:09,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-04 08:42:09,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-04 08:42:09,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:09,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-04 08:42:09,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:09,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:09,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:09,870 INFO L175 Difference]: Start difference. First operand has 60 places, 70 transitions, 232 flow. Second operand 3 states and 535 transitions. [2023-08-04 08:42:09,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 443 flow [2023-08-04 08:42:09,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:09,917 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 242 flow [2023-08-04 08:42:09,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2023-08-04 08:42:09,918 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-04 08:42:09,919 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 242 flow [2023-08-04 08:42:09,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:09,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:09,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:09,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 08:42:10,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:10,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:10,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1528482685, now seen corresponding path program 1 times [2023-08-04 08:42:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:10,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205435989] [2023-08-04 08:42:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:42:10,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205435989] [2023-08-04 08:42:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205435989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287963837] [2023-08-04 08:42:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:10,221 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:42:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:10,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:10,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:42:10,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287963837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:42:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327808246] [2023-08-04 08:42:10,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:10,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:10,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:42:10,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:10,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:10,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:42:10,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:27,903 INFO L124 PetriNetUnfolderBase]: 229466/278317 cut-off events. [2023-08-04 08:42:27,910 INFO L125 PetriNetUnfolderBase]: For 26311/26311 co-relation queries the response was YES. [2023-08-04 08:42:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581611 conditions, 278317 events. 229466/278317 cut-off events. For 26311/26311 co-relation queries the response was YES. Maximal size of possible extension queue 5100. Compared 1405539 event pairs, 86967 based on Foata normal form. 0/164954 useless extension candidates. Maximal degree in co-relation 229378. Up to 211353 conditions per place. [2023-08-04 08:42:30,011 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 08:42:30,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 455 flow [2023-08-04 08:42:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-04 08:42:30,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307539682539683 [2023-08-04 08:42:30,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-04 08:42:30,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-04 08:42:30,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:30,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-04 08:42:30,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:30,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:30,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:30,016 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 242 flow. Second operand 3 states and 535 transitions. [2023-08-04 08:42:30,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 455 flow [2023-08-04 08:42:30,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:30,176 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 252 flow [2023-08-04 08:42:30,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-08-04 08:42:30,177 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2023-08-04 08:42:30,177 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 252 flow [2023-08-04 08:42:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:30,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:30,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:30,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 08:42:30,381 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,SelfDestructingSolverStorable12 [2023-08-04 08:42:30,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:30,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1850369477, now seen corresponding path program 1 times [2023-08-04 08:42:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:30,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744798044] [2023-08-04 08:42:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:42:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:30,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744798044] [2023-08-04 08:42:30,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744798044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:30,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682180460] [2023-08-04 08:42:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:30,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:30,433 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:30,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:42:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:30,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:42:30,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:42:30,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:42:30,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682180460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:30,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:42:30,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:42:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090481648] [2023-08-04 08:42:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:30,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 08:42:30,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:30,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:30,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 08:42:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:45,940 INFO L124 PetriNetUnfolderBase]: 228400/277732 cut-off events. [2023-08-04 08:42:45,940 INFO L125 PetriNetUnfolderBase]: For 28423/28423 co-relation queries the response was YES. [2023-08-04 08:42:46,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587985 conditions, 277732 events. 228400/277732 cut-off events. For 28423/28423 co-relation queries the response was YES. Maximal size of possible extension queue 4992. Compared 1407425 event pairs, 100117 based on Foata normal form. 0/167997 useless extension candidates. Maximal degree in co-relation 315839. Up to 241880 conditions per place. [2023-08-04 08:42:47,855 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 08:42:47,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 467 flow [2023-08-04 08:42:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:42:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:42:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-04 08:42:47,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307539682539683 [2023-08-04 08:42:47,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-04 08:42:47,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-04 08:42:47,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:47,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-04 08:42:47,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:47,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:47,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:47,876 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 252 flow. Second operand 3 states and 535 transitions. [2023-08-04 08:42:47,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 467 flow [2023-08-04 08:42:52,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:42:52,852 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 262 flow [2023-08-04 08:42:52,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2023-08-04 08:42:52,854 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-08-04 08:42:52,854 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 262 flow [2023-08-04 08:42:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:52,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:52,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:52,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:42:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:42:53,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:53,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1779268424, now seen corresponding path program 1 times [2023-08-04 08:42:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183292187] [2023-08-04 08:42:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:42:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183292187] [2023-08-04 08:42:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183292187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538118048] [2023-08-04 08:42:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:53,145 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:53,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:42:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:53,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:42:53,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:42:53,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:42:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:42:53,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538118048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:42:53,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:42:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:42:53,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665464815] [2023-08-04 08:42:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:42:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:42:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:42:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:42:53,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:42:53,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:53,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:53,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:42:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:09,166 INFO L124 PetriNetUnfolderBase]: 213304/259294 cut-off events. [2023-08-04 08:43:09,166 INFO L125 PetriNetUnfolderBase]: For 24760/24760 co-relation queries the response was YES. [2023-08-04 08:43:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551372 conditions, 259294 events. 213304/259294 cut-off events. For 24760/24760 co-relation queries the response was YES. Maximal size of possible extension queue 4970. Compared 1314306 event pairs, 77387 based on Foata normal form. 3/157636 useless extension candidates. Maximal degree in co-relation 466455. Up to 250736 conditions per place. [2023-08-04 08:43:11,516 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 65 selfloop transitions, 3 changer transitions 1/81 dead transitions. [2023-08-04 08:43:11,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 416 flow [2023-08-04 08:43:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:43:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:43:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 673 transitions. [2023-08-04 08:43:11,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007440476190477 [2023-08-04 08:43:11,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 673 transitions. [2023-08-04 08:43:11,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 673 transitions. [2023-08-04 08:43:11,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:11,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 673 transitions. [2023-08-04 08:43:11,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.25) internal successors, (673), 4 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) [2023-08-04 08:43:11,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:11,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:11,523 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 262 flow. Second operand 4 states and 673 transitions. [2023-08-04 08:43:11,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 416 flow [2023-08-04 08:43:17,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:43:17,177 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 274 flow [2023-08-04 08:43:17,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-08-04 08:43:17,178 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2023-08-04 08:43:17,179 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 274 flow [2023-08-04 08:43:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:17,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:17,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:17,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:43:17,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:43:17,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:17,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1442862028, now seen corresponding path program 1 times [2023-08-04 08:43:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:17,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071649176] [2023-08-04 08:43:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:17,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:43:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:17,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071649176] [2023-08-04 08:43:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071649176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580743101] [2023-08-04 08:43:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:17,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:17,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:17,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:43:17,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:43:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:17,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:43:17,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:43:17,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:43:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:43:17,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580743101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:43:17,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:43:17,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:43:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276166480] [2023-08-04 08:43:17,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:43:17,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:43:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:43:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:43:17,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:43:17,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 158.6) internal successors, (793), 5 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:17,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:17,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:43:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:34,363 INFO L124 PetriNetUnfolderBase]: 200725/244114 cut-off events. [2023-08-04 08:43:34,363 INFO L125 PetriNetUnfolderBase]: For 20210/20210 co-relation queries the response was YES. [2023-08-04 08:43:35,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518755 conditions, 244114 events. 200725/244114 cut-off events. For 20210/20210 co-relation queries the response was YES. Maximal size of possible extension queue 4796. Compared 1247937 event pairs, 73555 based on Foata normal form. 27/148621 useless extension candidates. Maximal degree in co-relation 434531. Up to 234952 conditions per place. [2023-08-04 08:43:36,226 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 73 selfloop transitions, 3 changer transitions 1/89 dead transitions. [2023-08-04 08:43:36,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 460 flow [2023-08-04 08:43:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:43:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:43:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2023-08-04 08:43:36,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066964285714286 [2023-08-04 08:43:36,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2023-08-04 08:43:36,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2023-08-04 08:43:36,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:36,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2023-08-04 08:43:36,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:36,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:36,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:36,233 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 274 flow. Second operand 4 states and 681 transitions. [2023-08-04 08:43:36,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 460 flow [2023-08-04 08:43:39,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:43:40,000 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 278 flow [2023-08-04 08:43:40,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-04 08:43:40,001 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2023-08-04 08:43:40,001 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 278 flow [2023-08-04 08:43:40,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.6) internal successors, (793), 5 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:40,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:40,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:40,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:43:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:43:40,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:40,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1357032763, now seen corresponding path program 1 times [2023-08-04 08:43:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54758306] [2023-08-04 08:43:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54758306] [2023-08-04 08:43:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54758306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951572937] [2023-08-04 08:43:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:40,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:40,268 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:43:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:43:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:40,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:43:40,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:40,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:43:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951572937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:43:40,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:43:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:43:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599455657] [2023-08-04 08:43:40,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:43:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:43:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:43:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:43:40,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:43:40,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 158.8) internal successors, (794), 5 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:40,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:40,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:43:40,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:54,540 INFO L124 PetriNetUnfolderBase]: 194488/236500 cut-off events. [2023-08-04 08:43:54,541 INFO L125 PetriNetUnfolderBase]: For 17604/17604 co-relation queries the response was YES. [2023-08-04 08:43:55,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500221 conditions, 236500 events. 194488/236500 cut-off events. For 17604/17604 co-relation queries the response was YES. Maximal size of possible extension queue 5054. Compared 1223017 event pairs, 68111 based on Foata normal form. 243/144139 useless extension candidates. Maximal degree in co-relation 416479. Up to 212647 conditions per place. [2023-08-04 08:43:56,439 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 81 selfloop transitions, 3 changer transitions 1/97 dead transitions. [2023-08-04 08:43:56,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 496 flow [2023-08-04 08:43:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:43:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:43:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 689 transitions. [2023-08-04 08:43:56,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126488095238095 [2023-08-04 08:43:56,441 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 689 transitions. [2023-08-04 08:43:56,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 689 transitions. [2023-08-04 08:43:56,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:56,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 689 transitions. [2023-08-04 08:43:56,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,444 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,444 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 278 flow. Second operand 4 states and 689 transitions. [2023-08-04 08:43:56,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 496 flow [2023-08-04 08:43:59,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 486 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:43:59,708 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 282 flow [2023-08-04 08:43:59,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2023-08-04 08:43:59,708 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2023-08-04 08:43:59,708 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 282 flow [2023-08-04 08:43:59,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.8) internal successors, (794), 5 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:59,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:59,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:59,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 08:43:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:59,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:59,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1776039601, now seen corresponding path program 1 times [2023-08-04 08:43:59,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390805595] [2023-08-04 08:43:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:43:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390805595] [2023-08-04 08:43:59,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390805595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508749141] [2023-08-04 08:43:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:59,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:43:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:44:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:00,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:44:00,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:44:00,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:44:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:44:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508749141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:44:00,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:44:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:44:00,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306629039] [2023-08-04 08:44:00,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:44:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:44:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:44:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:00,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:44:00,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:00,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:00,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:44:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:08,396 INFO L124 PetriNetUnfolderBase]: 121201/148228 cut-off events. [2023-08-04 08:44:08,397 INFO L125 PetriNetUnfolderBase]: For 17745/17745 co-relation queries the response was YES. [2023-08-04 08:44:08,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313220 conditions, 148228 events. 121201/148228 cut-off events. For 17745/17745 co-relation queries the response was YES. Maximal size of possible extension queue 2636. Compared 718410 event pairs, 29065 based on Foata normal form. 1458/91498 useless extension candidates. Maximal degree in co-relation 292330. Up to 71814 conditions per place. [2023-08-04 08:44:09,615 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 89 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-08-04 08:44:09,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 545 flow [2023-08-04 08:44:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:44:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:44:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-08-04 08:44:09,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186011904761905 [2023-08-04 08:44:09,622 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-08-04 08:44:09,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-08-04 08:44:09,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:09,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-08-04 08:44:09,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:09,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:09,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:09,626 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 282 flow. Second operand 4 states and 697 transitions. [2023-08-04 08:44:09,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 545 flow [2023-08-04 08:44:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 105 transitions, 534 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:44:11,040 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 292 flow [2023-08-04 08:44:11,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-04 08:44:11,040 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-08-04 08:44:11,041 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 292 flow [2023-08-04 08:44:11,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:11,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:11,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:11,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:11,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:44:11,246 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:11,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -409144940, now seen corresponding path program 1 times [2023-08-04 08:44:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247960922] [2023-08-04 08:44:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:44:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247960922] [2023-08-04 08:44:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247960922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011059539] [2023-08-04 08:44:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:11,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:11,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:44:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:11,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:44:11,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:44:11,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:44:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:44:11,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011059539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:44:11,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:44:11,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:44:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777819137] [2023-08-04 08:44:11,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:44:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:44:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:44:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:11,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:44:11,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:11,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:11,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:44:11,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:20,335 INFO L124 PetriNetUnfolderBase]: 115306/140696 cut-off events. [2023-08-04 08:44:20,336 INFO L125 PetriNetUnfolderBase]: For 34166/34166 co-relation queries the response was YES. [2023-08-04 08:44:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308593 conditions, 140696 events. 115306/140696 cut-off events. For 34166/34166 co-relation queries the response was YES. Maximal size of possible extension queue 2636. Compared 671643 event pairs, 44506 based on Foata normal form. 694/85902 useless extension candidates. Maximal degree in co-relation 305495. Up to 101418 conditions per place. [2023-08-04 08:44:21,312 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 90 selfloop transitions, 4 changer transitions 0/106 dead transitions. [2023-08-04 08:44:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 556 flow [2023-08-04 08:44:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:44:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:44:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-08-04 08:44:21,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186011904761905 [2023-08-04 08:44:21,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-08-04 08:44:21,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-08-04 08:44:21,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:21,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-08-04 08:44:21,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:21,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:21,324 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:21,324 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 292 flow. Second operand 4 states and 697 transitions. [2023-08-04 08:44:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 556 flow [2023-08-04 08:44:23,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 552 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:44:23,057 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 308 flow [2023-08-04 08:44:23,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2023-08-04 08:44:23,057 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2023-08-04 08:44:23,058 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 308 flow [2023-08-04 08:44:23,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:23,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:23,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:23,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:23,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:23,263 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:23,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash 629672780, now seen corresponding path program 1 times [2023-08-04 08:44:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:23,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580081641] [2023-08-04 08:44:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:44:23,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:23,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580081641] [2023-08-04 08:44:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580081641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:23,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313937820] [2023-08-04 08:44:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:23,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:23,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:23,322 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:23,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:44:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:23,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:44:23,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:44:23,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:44:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:44:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313937820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:44:23,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:44:23,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:44:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824514298] [2023-08-04 08:44:23,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:44:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:44:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:44:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:23,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 08:44:23,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:23,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:23,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 08:44:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:32,621 INFO L124 PetriNetUnfolderBase]: 115282/140655 cut-off events. [2023-08-04 08:44:32,621 INFO L125 PetriNetUnfolderBase]: For 34032/34032 co-relation queries the response was YES. [2023-08-04 08:44:33,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313742 conditions, 140655 events. 115282/140655 cut-off events. For 34032/34032 co-relation queries the response was YES. Maximal size of possible extension queue 2636. Compared 671752 event pairs, 57259 based on Foata normal form. 19/85198 useless extension candidates. Maximal degree in co-relation 310588. Up to 134404 conditions per place. [2023-08-04 08:44:33,614 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 89 selfloop transitions, 3 changer transitions 3/107 dead transitions. [2023-08-04 08:44:33,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 574 flow [2023-08-04 08:44:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:44:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:44:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-08-04 08:44:33,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186011904761905 [2023-08-04 08:44:33,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-08-04 08:44:33,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-08-04 08:44:33,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:33,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-08-04 08:44:33,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:33,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:33,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:33,619 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 308 flow. Second operand 4 states and 697 transitions. [2023-08-04 08:44:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 574 flow [2023-08-04 08:44:36,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 570 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:44:36,365 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 306 flow [2023-08-04 08:44:36,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-04 08:44:36,366 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2023-08-04 08:44:36,366 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 306 flow [2023-08-04 08:44:36,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:36,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:36,366 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:36,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:36,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:36,571 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:36,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:36,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1125631085, now seen corresponding path program 1 times [2023-08-04 08:44:36,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:36,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869129658] [2023-08-04 08:44:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:36,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-08-04 08:44:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869129658] [2023-08-04 08:44:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869129658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:36,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:44:36,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 08:44:36,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667199451] [2023-08-04 08:44:36,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:44:36,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 336 [2023-08-04 08:44:36,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:36,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:36,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 336 [2023-08-04 08:44:36,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:44,342 INFO L124 PetriNetUnfolderBase]: 107107/126545 cut-off events. [2023-08-04 08:44:44,342 INFO L125 PetriNetUnfolderBase]: For 53370/53370 co-relation queries the response was YES. [2023-08-04 08:44:44,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281830 conditions, 126545 events. 107107/126545 cut-off events. For 53370/53370 co-relation queries the response was YES. Maximal size of possible extension queue 2187. Compared 516135 event pairs, 9073 based on Foata normal form. 1/74382 useless extension candidates. Maximal degree in co-relation 281410. Up to 116374 conditions per place. [2023-08-04 08:44:45,311 INFO L140 encePairwiseOnDemand]: 328/336 looper letters, 111 selfloop transitions, 7 changer transitions 1/131 dead transitions. [2023-08-04 08:44:45,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 131 transitions, 810 flow [2023-08-04 08:44:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 08:44:45,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2023-08-04 08:44:45,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 08:44:45,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 08:44:45,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:45,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 08:44:45,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,328 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 306 flow. Second operand 3 states and 561 transitions. [2023-08-04 08:44:45,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 131 transitions, 810 flow [2023-08-04 08:44:45,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 790 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-04 08:44:45,859 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 343 flow [2023-08-04 08:44:45,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-04 08:44:45,860 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 23 predicate places. [2023-08-04 08:44:45,860 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 343 flow [2023-08-04 08:44:45,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:45,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:45,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:44:45,862 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:45,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash -910184618, now seen corresponding path program 1 times [2023-08-04 08:44:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:45,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824348906] [2023-08-04 08:44:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:44:46,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:46,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824348906] [2023-08-04 08:44:46,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824348906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:46,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:44:46,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:44:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820734098] [2023-08-04 08:44:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:46,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:44:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:44:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:46,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 336 [2023-08-04 08:44:46,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 155.4) internal successors, (777), 5 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:46,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:46,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 336 [2023-08-04 08:44:46,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:45:06,923 INFO L124 PetriNetUnfolderBase]: 221813/271732 cut-off events. [2023-08-04 08:45:06,924 INFO L125 PetriNetUnfolderBase]: For 171453/171453 co-relation queries the response was YES. [2023-08-04 08:45:08,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712455 conditions, 271732 events. 221813/271732 cut-off events. For 171453/171453 co-relation queries the response was YES. Maximal size of possible extension queue 5377. Compared 1460794 event pairs, 44956 based on Foata normal form. 7575/279307 useless extension candidates. Maximal degree in co-relation 711365. Up to 108507 conditions per place. [2023-08-04 08:45:09,187 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 285 selfloop transitions, 12 changer transitions 0/307 dead transitions. [2023-08-04 08:45:09,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 307 transitions, 2005 flow [2023-08-04 08:45:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:45:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:45:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1131 transitions. [2023-08-04 08:45:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610119047619048 [2023-08-04 08:45:09,189 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1131 transitions. [2023-08-04 08:45:09,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1131 transitions. [2023-08-04 08:45:09,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:45:09,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1131 transitions. [2023-08-04 08:45:09,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.5) internal successors, (1131), 6 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:09,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:09,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 336.0) internal successors, (2352), 7 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:09,193 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 343 flow. Second operand 6 states and 1131 transitions. [2023-08-04 08:45:09,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 307 transitions, 2005 flow [2023-08-04 08:45:13,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 307 transitions, 1979 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:45:13,973 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 431 flow [2023-08-04 08:45:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=431, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-04 08:45:13,974 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2023-08-04 08:45:13,974 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 431 flow [2023-08-04 08:45:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.4) internal successors, (777), 5 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:45:13,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:45:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:45:13,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:45:13,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:45:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 728310864, now seen corresponding path program 2 times [2023-08-04 08:45:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:45:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136444624] [2023-08-04 08:45:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:45:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:45:14,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:45:14,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136444624] [2023-08-04 08:45:14,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136444624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:45:14,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:45:14,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:45:14,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515412425] [2023-08-04 08:45:14,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:45:14,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:45:14,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:45:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:45:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:45:14,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 336 [2023-08-04 08:45:14,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:14,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:45:14,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 336 [2023-08-04 08:45:14,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:45:40,725 INFO L124 PetriNetUnfolderBase]: 276163/337923 cut-off events. [2023-08-04 08:45:40,725 INFO L125 PetriNetUnfolderBase]: For 373802/388709 co-relation queries the response was YES. [2023-08-04 08:45:42,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000713 conditions, 337923 events. 276163/337923 cut-off events. For 373802/388709 co-relation queries the response was YES. Maximal size of possible extension queue 6757. Compared 1806190 event pairs, 83554 based on Foata normal form. 17863/355786 useless extension candidates. Maximal degree in co-relation 999319. Up to 161931 conditions per place. [2023-08-04 08:45:43,954 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 179 selfloop transitions, 10 changer transitions 0/200 dead transitions. [2023-08-04 08:45:43,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 200 transitions, 1359 flow [2023-08-04 08:45:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:45:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:45:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-04 08:45:43,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632440476190477 [2023-08-04 08:45:43,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-04 08:45:43,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-04 08:45:43,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:45:43,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-04 08:45:43,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:43,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:43,959 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:43,959 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 431 flow. Second operand 4 states and 757 transitions. [2023-08-04 08:45:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 200 transitions, 1359 flow [2023-08-04 08:45:54,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 200 transitions, 1345 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-04 08:45:54,690 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 496 flow [2023-08-04 08:45:54,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=496, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2023-08-04 08:45:54,691 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 37 predicate places. [2023-08-04 08:45:54,691 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 496 flow [2023-08-04 08:45:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:54,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:45:54,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:45:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:45:54,691 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:45:54,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:45:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -914302455, now seen corresponding path program 1 times [2023-08-04 08:45:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:45:54,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568964863] [2023-08-04 08:45:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:45:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:45:54,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:45:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568964863] [2023-08-04 08:45:54,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568964863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:45:54,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:45:54,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:45:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95165440] [2023-08-04 08:45:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:45:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:45:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:45:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:45:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:45:54,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 336 [2023-08-04 08:45:54,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:54,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:45:54,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 336 [2023-08-04 08:45:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:45,709 INFO L124 PetriNetUnfolderBase]: 443240/545135 cut-off events. [2023-08-04 08:46:45,709 INFO L125 PetriNetUnfolderBase]: For 1123047/1202668 co-relation queries the response was YES. [2023-08-04 08:46:49,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1725759 conditions, 545135 events. 443240/545135 cut-off events. For 1123047/1202668 co-relation queries the response was YES. Maximal size of possible extension queue 11418. Compared 3155769 event pairs, 108466 based on Foata normal form. 46240/584966 useless extension candidates. Maximal degree in co-relation 1723314. Up to 278730 conditions per place. [2023-08-04 08:46:52,308 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 189 selfloop transitions, 6 changer transitions 0/209 dead transitions. [2023-08-04 08:46:52,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 209 transitions, 1531 flow [2023-08-04 08:46:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:46:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:46:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 747 transitions. [2023-08-04 08:46:52,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558035714285714 [2023-08-04 08:46:52,310 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 747 transitions. [2023-08-04 08:46:52,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 747 transitions. [2023-08-04 08:46:52,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:52,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 747 transitions. [2023-08-04 08:46:52,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:52,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:52,313 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:52,313 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 496 flow. Second operand 4 states and 747 transitions. [2023-08-04 08:46:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 209 transitions, 1531 flow [2023-08-04 08:47:19,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 209 transitions, 1507 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:19,649 INFO L231 Difference]: Finished difference. Result has 103 places, 97 transitions, 534 flow [2023-08-04 08:47:19,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=534, PETRI_PLACES=103, PETRI_TRANSITIONS=97} [2023-08-04 08:47:19,650 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 43 predicate places. [2023-08-04 08:47:19,650 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 97 transitions, 534 flow [2023-08-04 08:47:19,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:19,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 08:47:19,651 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:19,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash -926244028, now seen corresponding path program 1 times [2023-08-04 08:47:19,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:19,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570886625] [2023-08-04 08:47:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:19,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:47:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570886625] [2023-08-04 08:47:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570886625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:47:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929476369] [2023-08-04 08:47:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:47:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:47:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:47:19,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 336 [2023-08-04 08:47:19,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 97 transitions, 534 flow. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 336 [2023-08-04 08:47:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand