/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:00:34,213 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:00:34,289 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:00:34,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:00:34,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:00:34,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:00:34,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:00:34,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:00:34,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:00:34,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:00:34,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:00:34,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:00:34,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:00:34,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:00:34,329 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:00:34,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:00:34,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:00:34,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:00:34,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:00:34,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:00:34,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:00:34,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:00:34,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:00:34,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:00:34,331 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:00:34,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:00:34,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:00:34,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:00:34,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:00:34,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:00:34,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:34,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:00:34,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:00:34,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:00:34,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:00:34,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:00:34,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:00:34,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:00:34,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:00:34,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:00:34,335 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:00:34,335 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:00:34,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:00:34,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:00:34,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:00:34,595 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:00:34,595 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:00:34,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 02:00:35,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:00:35,896 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:00:35,896 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 02:00:35,903 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b194ebfc0/197f4e94a5324135b65f410e0cc7c205/FLAGa0fe6829a [2023-08-04 02:00:35,916 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b194ebfc0/197f4e94a5324135b65f410e0cc7c205 [2023-08-04 02:00:35,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:00:35,919 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:00:35,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:35,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:00:35,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:00:35,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:35" (1/1) ... [2023-08-04 02:00:35,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e48f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:35, skipping insertion in model container [2023-08-04 02:00:35,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:35" (1/1) ... [2023-08-04 02:00:35,944 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:00:36,111 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_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-04 02:00:36,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:36,124 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:00:36,146 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_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-04 02:00:36,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:36,170 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:00:36,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36 WrapperNode [2023-08-04 02:00:36,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:36,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:36,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:00:36,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:00:36,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,220 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 230 [2023-08-04 02:00:36,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:36,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:00:36,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:00:36,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:00:36,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,251 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:00:36,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:00:36,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:00:36,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:00:36,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (1/1) ... [2023-08-04 02:00:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:36,286 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 02:00:36,316 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 02:00:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:00:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:00:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:00:36,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:00:36,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:00:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:00:36,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:00:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:00:36,340 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 02:00:36,461 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:00:36,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:00:36,784 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:00:36,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:00:36,792 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 02:00:36,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:36 BoogieIcfgContainer [2023-08-04 02:00:36,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:00:36,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:00:36,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:00:36,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:00:36,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:00:35" (1/3) ... [2023-08-04 02:00:36,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686348fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:36, skipping insertion in model container [2023-08-04 02:00:36,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:36" (2/3) ... [2023-08-04 02:00:36,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686348fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:36, skipping insertion in model container [2023-08-04 02:00:36,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:36" (3/3) ... [2023-08-04 02:00:36,801 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 02:00:36,807 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:00:36,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:00:36,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:00:36,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:00:36,915 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:00:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,135 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 02:00:37,136 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 02:00:37,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 02:00:37,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:37,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 02:00:37,247 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 02:00:37,247 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 02:00:37,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 02:00:37,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 16110 [2023-08-04 02:00:43,111 INFO L134 LiptonReduction]: Checked pairs total: 18874 [2023-08-04 02:00:43,111 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-04 02:00:43,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:00:43,130 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;@3557fb49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:43,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:00:43,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:43,137 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 02:00:43,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:00:43,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:43,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:43,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:43,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1940426108, now seen corresponding path program 1 times [2023-08-04 02:00:43,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:43,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33818800] [2023-08-04 02:00:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:43,518 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 02:00:43,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33818800] [2023-08-04 02:00:43,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33818800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:43,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:43,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:00:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351951681] [2023-08-04 02:00:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:43,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:43,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 543 [2023-08-04 02:00:43,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 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 02:00:43,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:43,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 543 [2023-08-04 02:00:43,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:43,776 INFO L124 PetriNetUnfolderBase]: 628/1059 cut-off events. [2023-08-04 02:00:43,776 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 02:00:43,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 1059 events. 628/1059 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4628 event pairs, 476 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 1796. Up to 1024 conditions per place. [2023-08-04 02:00:43,781 INFO L140 encePairwiseOnDemand]: 536/543 looper letters, 20 selfloop transitions, 4 changer transitions 15/41 dead transitions. [2023-08-04 02:00:43,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 178 flow [2023-08-04 02:00:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-04 02:00:43,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953345610804173 [2023-08-04 02:00:43,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-04 02:00:43,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-04 02:00:43,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:43,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-04 02:00:43,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:43,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:43,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:43,820 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 104 flow. Second operand 3 states and 716 transitions. [2023-08-04 02:00:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 178 flow [2023-08-04 02:00:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:00:43,825 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 80 flow [2023-08-04 02:00:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-04 02:00:43,831 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-04 02:00:43,832 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 80 flow [2023-08-04 02:00:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 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 02:00:43,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:43,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:43,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:00:43,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:43,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash 799704509, now seen corresponding path program 1 times [2023-08-04 02:00:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:43,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882311609] [2023-08-04 02:00:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:44,033 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 02:00:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:44,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882311609] [2023-08-04 02:00:44,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882311609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:44,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836767186] [2023-08-04 02:00:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:44,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:44,044 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 02:00:44,049 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 02:00:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:44,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:00:44,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:44,215 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 02:00:44,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:44,236 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 02:00:44,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836767186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:44,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:44,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:00:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157005806] [2023-08-04 02:00:44,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:44,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:00:44,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:00:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:00:44,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 543 [2023-08-04 02:00:44,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 80 flow. Second operand has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:44,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:44,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 543 [2023-08-04 02:00:44,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:44,452 INFO L124 PetriNetUnfolderBase]: 164/305 cut-off events. [2023-08-04 02:00:44,453 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 02:00:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 305 events. 164/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1023 event pairs, 124 based on Foata normal form. 3/263 useless extension candidates. Maximal degree in co-relation 613. Up to 286 conditions per place. [2023-08-04 02:00:44,455 INFO L140 encePairwiseOnDemand]: 538/543 looper letters, 20 selfloop transitions, 10 changer transitions 0/32 dead transitions. [2023-08-04 02:00:44,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 164 flow [2023-08-04 02:00:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:00:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:00:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1362 transitions. [2023-08-04 02:00:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180478821362799 [2023-08-04 02:00:44,463 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1362 transitions. [2023-08-04 02:00:44,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1362 transitions. [2023-08-04 02:00:44,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:44,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1362 transitions. [2023-08-04 02:00:44,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:44,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:44,479 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:44,479 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 80 flow. Second operand 6 states and 1362 transitions. [2023-08-04 02:00:44,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 164 flow [2023-08-04 02:00:44,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:44,481 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 142 flow [2023-08-04 02:00:44,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-04 02:00:44,482 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-08-04 02:00:44,482 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 142 flow [2023-08-04 02:00:44,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:44,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:44,484 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:44,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:00:44,689 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 02:00:44,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:44,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -591867588, now seen corresponding path program 2 times [2023-08-04 02:00:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:44,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680576092] [2023-08-04 02:00:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:44,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680576092] [2023-08-04 02:00:44,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680576092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089900985] [2023-08-04 02:00:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:00:44,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:44,914 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 02:00:44,937 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 02:00:45,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:00:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:00:45,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:00:45,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:45,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089900985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:45,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 02:00:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233074153] [2023-08-04 02:00:45,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:00:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:00:45,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:00:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 543 [2023-08-04 02:00:45,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 142 flow. Second operand has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:45,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:45,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 543 [2023-08-04 02:00:45,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:45,505 INFO L124 PetriNetUnfolderBase]: 164/307 cut-off events. [2023-08-04 02:00:45,505 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 02:00:45,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 307 events. 164/307 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1023 event pairs, 124 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 604. Up to 286 conditions per place. [2023-08-04 02:00:45,507 INFO L140 encePairwiseOnDemand]: 538/543 looper letters, 20 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-08-04 02:00:45,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 218 flow [2023-08-04 02:00:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:00:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:00:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1581 transitions. [2023-08-04 02:00:45,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159431728492502 [2023-08-04 02:00:45,511 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1581 transitions. [2023-08-04 02:00:45,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1581 transitions. [2023-08-04 02:00:45,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:45,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1581 transitions. [2023-08-04 02:00:45,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 225.85714285714286) internal successors, (1581), 7 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:45,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 543.0) internal successors, (4344), 8 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:45,522 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 543.0) internal successors, (4344), 8 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:45,522 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 142 flow. Second operand 7 states and 1581 transitions. [2023-08-04 02:00:45,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 218 flow [2023-08-04 02:00:45,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 202 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:45,524 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 172 flow [2023-08-04 02:00:45,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-04 02:00:45,525 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-04 02:00:45,525 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 172 flow [2023-08-04 02:00:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:45,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:45,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:45,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:45,733 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 02:00:45,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:45,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1174974211, now seen corresponding path program 3 times [2023-08-04 02:00:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370471211] [2023-08-04 02:00:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:45,803 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:00:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:45,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:00:45,856 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:00:45,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:00:45,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:00:45,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:00:45,860 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:00:45,861 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:00:45,862 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:00:45,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:00:45,908 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:00:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,146 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 02:00:46,147 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 02:00:46,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 02:00:46,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,177 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:46,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:00:46,450 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 02:00:46,451 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 02:00:46,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 02:00:46,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 50220 [2023-08-04 02:00:53,374 INFO L134 LiptonReduction]: Checked pairs total: 67084 [2023-08-04 02:00:53,374 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-08-04 02:00:53,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:00:53,377 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;@3557fb49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:53,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:00:53,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:53,385 INFO L124 PetriNetUnfolderBase]: 11/93 cut-off events. [2023-08-04 02:00:53,385 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:00:53,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:53,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:53,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:53,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1297954532, now seen corresponding path program 1 times [2023-08-04 02:00:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338020164] [2023-08-04 02:00:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:00:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338020164] [2023-08-04 02:00:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338020164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:53,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:00:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501902215] [2023-08-04 02:00:53,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:53,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 735 [2023-08-04 02:00:53,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 735 [2023-08-04 02:00:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:02,031 INFO L124 PetriNetUnfolderBase]: 84654/111453 cut-off events. [2023-08-04 02:01:02,031 INFO L125 PetriNetUnfolderBase]: For 6938/6938 co-relation queries the response was YES. [2023-08-04 02:01:02,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224590 conditions, 111453 events. 84654/111453 cut-off events. For 6938/6938 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 633466 event pairs, 68496 based on Foata normal form. 0/90565 useless extension candidates. Maximal degree in co-relation 58974. Up to 109306 conditions per place. [2023-08-04 02:01:02,357 INFO L140 encePairwiseOnDemand]: 727/735 looper letters, 36 selfloop transitions, 4 changer transitions 19/63 dead transitions. [2023-08-04 02:01:02,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 288 flow [2023-08-04 02:01:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-08-04 02:01:02,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44580498866213153 [2023-08-04 02:01:02,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-08-04 02:01:02,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-08-04 02:01:02,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:02,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-08-04 02:01:02,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,366 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 176 flow. Second operand 3 states and 983 transitions. [2023-08-04 02:01:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 288 flow [2023-08-04 02:01:02,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:01:02,379 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 130 flow [2023-08-04 02:01:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-04 02:01:02,381 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 02:01:02,381 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 130 flow [2023-08-04 02:01:02,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:02,381 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 02:01:02,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 415882844, now seen corresponding path program 1 times [2023-08-04 02:01:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:02,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688245194] [2023-08-04 02:01:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:02,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:01:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688245194] [2023-08-04 02:01:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688245194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893365331] [2023-08-04 02:01:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:02,453 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 02:01:02,455 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 02:01:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:02,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:01:02,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:01:02,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:01:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893365331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:02,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:01:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999933432] [2023-08-04 02:01:02,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:02,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:01:02,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:01:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:01:02,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 735 [2023-08-04 02:01:02,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:02,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 735 [2023-08-04 02:01:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:04,763 INFO L124 PetriNetUnfolderBase]: 18742/24593 cut-off events. [2023-08-04 02:01:04,763 INFO L125 PetriNetUnfolderBase]: For 910/910 co-relation queries the response was YES. [2023-08-04 02:01:04,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50080 conditions, 24593 events. 18742/24593 cut-off events. For 910/910 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 119637 event pairs, 15360 based on Foata normal form. 3/21162 useless extension candidates. Maximal degree in co-relation 50046. Up to 24377 conditions per place. [2023-08-04 02:01:04,873 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 36 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2023-08-04 02:01:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 246 flow [2023-08-04 02:01:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:01:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:01:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1870 transitions. [2023-08-04 02:01:04,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42403628117913833 [2023-08-04 02:01:04,879 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1870 transitions. [2023-08-04 02:01:04,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1870 transitions. [2023-08-04 02:01:04,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:04,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1870 transitions. [2023-08-04 02:01:04,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 311.6666666666667) internal successors, (1870), 6 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:04,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:04,890 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:04,891 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 130 flow. Second operand 6 states and 1870 transitions. [2023-08-04 02:01:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 246 flow [2023-08-04 02:01:04,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 238 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:04,893 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 188 flow [2023-08-04 02:01:04,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 02:01:04,896 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-04 02:01:04,897 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 188 flow [2023-08-04 02:01:04,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:04,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:04,898 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:04,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:05,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:05,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:05,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash 486808860, now seen corresponding path program 2 times [2023-08-04 02:01:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5654831] [2023-08-04 02:01:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:05,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5654831] [2023-08-04 02:01:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5654831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203203269] [2023-08-04 02:01:05,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:01:05,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:05,253 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 02:01:05,256 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 02:01:05,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:01:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:01:05,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:01:05,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:05,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:05,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203203269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:05,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:05,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 02:01:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019131348] [2023-08-04 02:01:05,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:01:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:01:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:01:05,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 735 [2023-08-04 02:01:05,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 188 flow. Second operand has 17 states, 17 states have (on average 304.4117647058824) internal successors, (5175), 17 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:05,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:05,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 735 [2023-08-04 02:01:05,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:07,424 INFO L124 PetriNetUnfolderBase]: 18742/24595 cut-off events. [2023-08-04 02:01:07,424 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2023-08-04 02:01:07,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50010 conditions, 24595 events. 18742/24595 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 119567 event pairs, 15360 based on Foata normal form. 1/21162 useless extension candidates. Maximal degree in co-relation 49937. Up to 24377 conditions per place. [2023-08-04 02:01:07,537 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 36 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-04 02:01:07,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 296 flow [2023-08-04 02:01:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:01:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:01:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2171 transitions. [2023-08-04 02:01:07,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219630709426628 [2023-08-04 02:01:07,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2171 transitions. [2023-08-04 02:01:07,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2171 transitions. [2023-08-04 02:01:07,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:07,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2171 transitions. [2023-08-04 02:01:07,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.14285714285717) internal successors, (2171), 7 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:07,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 735.0) internal successors, (5880), 8 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:07,557 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 735.0) internal successors, (5880), 8 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:07,557 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 188 flow. Second operand 7 states and 2171 transitions. [2023-08-04 02:01:07,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 296 flow [2023-08-04 02:01:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 280 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:07,560 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 218 flow [2023-08-04 02:01:07,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-08-04 02:01:07,562 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 02:01:07,562 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 218 flow [2023-08-04 02:01:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 304.4117647058824) internal successors, (5175), 17 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:07,584 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 02:01:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:07,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:07,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1585320540, now seen corresponding path program 3 times [2023-08-04 02:01:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467789369] [2023-08-04 02:01:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 02:01:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467789369] [2023-08-04 02:01:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467789369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126368379] [2023-08-04 02:01:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:01:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:07,880 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 02:01:07,883 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 02:01:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 02:01:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:01:08,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:01:08,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 02:01:08,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126368379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:08,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:08,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:01:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234592976] [2023-08-04 02:01:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:01:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 02:01:08,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 312.4) internal successors, (1562), 5 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:08,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:08,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 02:01:08,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:10,061 INFO L124 PetriNetUnfolderBase]: 18670/24758 cut-off events. [2023-08-04 02:01:10,061 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-08-04 02:01:10,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50191 conditions, 24758 events. 18670/24758 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 127054 event pairs, 6880 based on Foata normal form. 0/21340 useless extension candidates. Maximal degree in co-relation 50113. Up to 24153 conditions per place. [2023-08-04 02:01:10,178 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-04 02:01:10,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 398 flow [2023-08-04 02:01:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:01:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:01:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2023-08-04 02:01:10,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383673469387755 [2023-08-04 02:01:10,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2023-08-04 02:01:10,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2023-08-04 02:01:10,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:10,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2023-08-04 02:01:10,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:10,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:10,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:10,191 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 218 flow. Second operand 5 states and 1611 transitions. [2023-08-04 02:01:10,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 398 flow [2023-08-04 02:01:10,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 373 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-04 02:01:10,193 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 212 flow [2023-08-04 02:01:10,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-04 02:01:10,194 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 02:01:10,194 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 212 flow [2023-08-04 02:01:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.4) internal successors, (1562), 5 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:10,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:10,194 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:10,201 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 02:01:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:10,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:10,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1384088418, now seen corresponding path program 1 times [2023-08-04 02:01:10,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:10,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624629812] [2023-08-04 02:01:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:10,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:01:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624629812] [2023-08-04 02:01:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624629812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:01:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447593551] [2023-08-04 02:01:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:10,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-04 02:01:10,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:10,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:10,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-04 02:01:10,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:12,299 INFO L124 PetriNetUnfolderBase]: 18471/24408 cut-off events. [2023-08-04 02:01:12,299 INFO L125 PetriNetUnfolderBase]: For 865/865 co-relation queries the response was YES. [2023-08-04 02:01:12,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49570 conditions, 24408 events. 18471/24408 cut-off events. For 865/865 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 121373 event pairs, 10590 based on Foata normal form. 1/21050 useless extension candidates. Maximal degree in co-relation 49503. Up to 23943 conditions per place. [2023-08-04 02:01:12,438 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 55 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 02:01:12,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 337 flow [2023-08-04 02:01:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-04 02:01:12,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 02:01:12,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-04 02:01:12,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-04 02:01:12,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:12,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-04 02:01:12,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:12,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:12,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:12,449 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 212 flow. Second operand 3 states and 980 transitions. [2023-08-04 02:01:12,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 337 flow [2023-08-04 02:01:12,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:12,451 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 210 flow [2023-08-04 02:01:12,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-04 02:01:12,452 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 02:01:12,452 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 210 flow [2023-08-04 02:01:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:12,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:12,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:12,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:01:12,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:12,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash -467686723, now seen corresponding path program 1 times [2023-08-04 02:01:12,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203463838] [2023-08-04 02:01:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:01:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203463838] [2023-08-04 02:01:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203463838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001336953] [2023-08-04 02:01:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:12,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:12,523 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 02:01:12,525 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 02:01:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:12,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:01:12,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:01:12,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:01:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001336953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:12,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:01:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959157008] [2023-08-04 02:01:12,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:12,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 02:01:12,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:12,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:12,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 02:01:12,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:14,377 INFO L124 PetriNetUnfolderBase]: 16509/21624 cut-off events. [2023-08-04 02:01:14,377 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-04 02:01:14,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43907 conditions, 21624 events. 16509/21624 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 103625 event pairs, 5760 based on Foata normal form. 6/18627 useless extension candidates. Maximal degree in co-relation 43840. Up to 21111 conditions per place. [2023-08-04 02:01:14,467 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 65 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-04 02:01:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 381 flow [2023-08-04 02:01:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2023-08-04 02:01:14,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418367346938776 [2023-08-04 02:01:14,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2023-08-04 02:01:14,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2023-08-04 02:01:14,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:14,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2023-08-04 02:01:14,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.75) internal successors, (1299), 4 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:14,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:14,484 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:14,484 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 210 flow. Second operand 4 states and 1299 transitions. [2023-08-04 02:01:14,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 381 flow [2023-08-04 02:01:14,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 71 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:01:14,486 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 207 flow [2023-08-04 02:01:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-08-04 02:01:14,487 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-08-04 02:01:14,487 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 207 flow [2023-08-04 02:01:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:14,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:14,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:14,497 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 02:01:14,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:14,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:14,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash 520780539, now seen corresponding path program 1 times [2023-08-04 02:01:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:14,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905985270] [2023-08-04 02:01:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:14,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-04 02:01:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905985270] [2023-08-04 02:01:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905985270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587344776] [2023-08-04 02:01:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:14,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:14,792 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 02:01:14,795 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 02:01:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:14,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:01:14,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-04 02:01:14,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587344776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:14,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:14,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:01:14,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020388067] [2023-08-04 02:01:14,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:14,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:14,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:01:14,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 02:01:14,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:14,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:14,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 02:01:14,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:16,017 INFO L124 PetriNetUnfolderBase]: 11325/14999 cut-off events. [2023-08-04 02:01:16,017 INFO L125 PetriNetUnfolderBase]: For 504/504 co-relation queries the response was YES. [2023-08-04 02:01:16,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30658 conditions, 14999 events. 11325/14999 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 68513 event pairs, 100 based on Foata normal form. 1296/14156 useless extension candidates. Maximal degree in co-relation 30591. Up to 7128 conditions per place. [2023-08-04 02:01:16,046 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 0 selfloop transitions, 0 changer transitions 107/107 dead transitions. [2023-08-04 02:01:16,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 525 flow [2023-08-04 02:01:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:01:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:01:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1645 transitions. [2023-08-04 02:01:16,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-08-04 02:01:16,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1645 transitions. [2023-08-04 02:01:16,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1645 transitions. [2023-08-04 02:01:16,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:16,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1645 transitions. [2023-08-04 02:01:16,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:16,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:16,059 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:16,060 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 207 flow. Second operand 5 states and 1645 transitions. [2023-08-04 02:01:16,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 525 flow [2023-08-04 02:01:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:01:16,070 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-04 02:01:16,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-04 02:01:16,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 02:01:16,072 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-04 02:01:16,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:16,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:01:16,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:01:16,081 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 02:01:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:16,278 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-08-04 02:01:16,279 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:01:16,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,426 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 02:01:16,426 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 02:01:16,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 02:01:16,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:01:16,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,447 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 02:01:16,610 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 02:01:16,611 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 02:01:16,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 02:01:16,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 50220 [2023-08-04 02:01:22,686 INFO L134 LiptonReduction]: Checked pairs total: 66805 [2023-08-04 02:01:22,686 INFO L136 LiptonReduction]: Total number of compositions: 371 [2023-08-04 02:01:22,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:01:22,688 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;@3557fb49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:01:22,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:01:22,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:01:22,692 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 02:01:22,692 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:01:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:22,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:22,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1510515140, now seen corresponding path program 1 times [2023-08-04 02:01:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123288747] [2023-08-04 02:01:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:22,735 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 02:01:22,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:22,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123288747] [2023-08-04 02:01:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123288747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:22,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:22,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:01:22,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240258577] [2023-08-04 02:01:22,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:22,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:22,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 728 [2023-08-04 02:01:22,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:22,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:22,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 728 [2023-08-04 02:01:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:30,322 INFO L124 PetriNetUnfolderBase]: 97293/128042 cut-off events. [2023-08-04 02:01:30,322 INFO L125 PetriNetUnfolderBase]: For 7645/7645 co-relation queries the response was YES. [2023-08-04 02:01:30,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257859 conditions, 128042 events. 97293/128042 cut-off events. For 7645/7645 co-relation queries the response was YES. Maximal size of possible extension queue 3050. Compared 740575 event pairs, 79372 based on Foata normal form. 3572/104746 useless extension candidates. Maximal degree in co-relation 58998. Up to 125517 conditions per place. [2023-08-04 02:01:30,804 INFO L140 encePairwiseOnDemand]: 720/728 looper letters, 54 selfloop transitions, 4 changer transitions 2/64 dead transitions. [2023-08-04 02:01:30,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 292 flow [2023-08-04 02:01:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-04 02:01:30,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-08-04 02:01:30,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-04 02:01:30,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-04 02:01:30,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:30,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-04 02:01:30,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:30,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:30,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:30,812 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 178 flow. Second operand 3 states and 984 transitions. [2023-08-04 02:01:30,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 292 flow [2023-08-04 02:01:30,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:01:30,968 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 182 flow [2023-08-04 02:01:30,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-04 02:01:30,969 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-04 02:01:30,969 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 182 flow [2023-08-04 02:01:30,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:30,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:30,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:30,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 02:01:30,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:30,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:30,970 INFO L85 PathProgramCache]: Analyzing trace with hash 312408190, now seen corresponding path program 1 times [2023-08-04 02:01:30,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:30,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632336796] [2023-08-04 02:01:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:30,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:31,037 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 02:01:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632336796] [2023-08-04 02:01:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632336796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:31,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:01:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637472540] [2023-08-04 02:01:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:31,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 728 [2023-08-04 02:01:31,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:31,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:31,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 728 [2023-08-04 02:01:31,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:38,953 INFO L124 PetriNetUnfolderBase]: 97051/127244 cut-off events. [2023-08-04 02:01:38,953 INFO L125 PetriNetUnfolderBase]: For 7280/7280 co-relation queries the response was YES. [2023-08-04 02:01:39,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256450 conditions, 127244 events. 97051/127244 cut-off events. For 7280/7280 co-relation queries the response was YES. Maximal size of possible extension queue 2953. Compared 727179 event pairs, 57792 based on Foata normal form. 0/100495 useless extension candidates. Maximal degree in co-relation 256425. Up to 125139 conditions per place. [2023-08-04 02:01:39,463 INFO L140 encePairwiseOnDemand]: 725/728 looper letters, 65 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 02:01:39,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 334 flow [2023-08-04 02:01:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2023-08-04 02:01:39,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574175824175824 [2023-08-04 02:01:39,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2023-08-04 02:01:39,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2023-08-04 02:01:39,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:39,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2023-08-04 02:01:39,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,471 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 182 flow. Second operand 3 states and 999 transitions. [2023-08-04 02:01:39,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 334 flow [2023-08-04 02:01:39,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:01:39,490 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 184 flow [2023-08-04 02:01:39,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2023-08-04 02:01:39,490 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-08-04 02:01:39,491 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 184 flow [2023-08-04 02:01:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:39,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:39,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 02:01:39,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:39,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2037454346, now seen corresponding path program 1 times [2023-08-04 02:01:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:39,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896295990] [2023-08-04 02:01:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:39,530 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 02:01:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896295990] [2023-08-04 02:01:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896295990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934139445] [2023-08-04 02:01:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:39,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:39,533 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 02:01:39,556 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 02:01:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:39,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:39,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:39,650 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 02:01:39,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934139445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:01:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832784640] [2023-08-04 02:01:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:39,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 728 [2023-08-04 02:01:39,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:39,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 728 [2023-08-04 02:01:39,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:47,278 INFO L124 PetriNetUnfolderBase]: 97002/127619 cut-off events. [2023-08-04 02:01:47,279 INFO L125 PetriNetUnfolderBase]: For 4059/4059 co-relation queries the response was YES. [2023-08-04 02:01:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256580 conditions, 127619 events. 97002/127619 cut-off events. For 4059/4059 co-relation queries the response was YES. Maximal size of possible extension queue 2973. Compared 733374 event pairs, 58589 based on Foata normal form. 0/100783 useless extension candidates. Maximal degree in co-relation 256549. Up to 123931 conditions per place. [2023-08-04 02:01:47,800 INFO L140 encePairwiseOnDemand]: 725/728 looper letters, 78 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 02:01:47,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 386 flow [2023-08-04 02:01:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1011 transitions. [2023-08-04 02:01:47,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46291208791208793 [2023-08-04 02:01:47,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1011 transitions. [2023-08-04 02:01:47,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1011 transitions. [2023-08-04 02:01:47,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:47,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1011 transitions. [2023-08-04 02:01:47,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:47,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:47,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:47,808 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 184 flow. Second operand 3 states and 1011 transitions. [2023-08-04 02:01:47,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 386 flow [2023-08-04 02:01:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:47,811 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 194 flow [2023-08-04 02:01:47,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-08-04 02:01:47,811 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-04 02:01:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 194 flow [2023-08-04 02:01:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:47,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:47,812 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 02:01:47,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:48,017 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,SelfDestructingSolverStorable13 [2023-08-04 02:01:48,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:48,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:48,018 INFO L85 PathProgramCache]: Analyzing trace with hash -257949196, now seen corresponding path program 1 times [2023-08-04 02:01:48,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:48,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675632470] [2023-08-04 02:01:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,060 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 02:01:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675632470] [2023-08-04 02:01:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675632470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399951864] [2023-08-04 02:01:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:48,063 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 02:01:48,088 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 02:01:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:48,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:48,189 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 02:01:48,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:48,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399951864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:48,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:48,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:01:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501267279] [2023-08-04 02:01:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:48,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:48,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 728 [2023-08-04 02:01:48,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:48,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:48,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 728 [2023-08-04 02:01:48,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:53,691 INFO L124 PetriNetUnfolderBase]: 66182/89026 cut-off events. [2023-08-04 02:01:53,692 INFO L125 PetriNetUnfolderBase]: For 6225/6225 co-relation queries the response was YES. [2023-08-04 02:01:53,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183672 conditions, 89026 events. 66182/89026 cut-off events. For 6225/6225 co-relation queries the response was YES. Maximal size of possible extension queue 1809. Compared 521771 event pairs, 38748 based on Foata normal form. 0/73252 useless extension candidates. Maximal degree in co-relation 183640. Up to 63097 conditions per place. [2023-08-04 02:01:54,018 INFO L140 encePairwiseOnDemand]: 725/728 looper letters, 89 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 02:01:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 448 flow [2023-08-04 02:01:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-04 02:01:54,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674908424908425 [2023-08-04 02:01:54,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-04 02:01:54,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-04 02:01:54,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:54,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-04 02:01:54,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:54,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:54,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:54,026 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 194 flow. Second operand 3 states and 1021 transitions. [2023-08-04 02:01:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 448 flow [2023-08-04 02:01:54,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 95 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:54,029 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 204 flow [2023-08-04 02:01:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-04 02:01:54,030 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-08-04 02:01:54,030 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 204 flow [2023-08-04 02:01:54,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:54,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:54,030 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 02:01:54,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:54,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:01:54,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:54,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1090685055, now seen corresponding path program 1 times [2023-08-04 02:01:54,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:54,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422646444] [2023-08-04 02:01:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:54,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:54,309 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 02:01:54,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422646444] [2023-08-04 02:01:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422646444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304775456] [2023-08-04 02:01:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:54,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:54,311 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 02:01:54,332 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 02:01:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:54,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:54,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:54,436 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 02:01:54,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304775456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:54,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:54,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:01:54,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417200972] [2023-08-04 02:01:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:54,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:54,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 728 [2023-08-04 02:01:54,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:54,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:54,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 728 [2023-08-04 02:01:54,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:59,302 INFO L124 PetriNetUnfolderBase]: 58264/78624 cut-off events. [2023-08-04 02:01:59,303 INFO L125 PetriNetUnfolderBase]: For 18122/18122 co-relation queries the response was YES. [2023-08-04 02:01:59,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168684 conditions, 78624 events. 58264/78624 cut-off events. For 18122/18122 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 450144 event pairs, 42005 based on Foata normal form. 0/66539 useless extension candidates. Maximal degree in co-relation 168651. Up to 66441 conditions per place. [2023-08-04 02:01:59,642 INFO L140 encePairwiseOnDemand]: 725/728 looper letters, 90 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-04 02:01:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 460 flow [2023-08-04 02:01:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-04 02:01:59,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674908424908425 [2023-08-04 02:01:59,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-04 02:01:59,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-04 02:01:59,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:59,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-04 02:01:59,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 728.0) internal successors, (2912), 4 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,650 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 204 flow. Second operand 3 states and 1021 transitions. [2023-08-04 02:01:59,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 460 flow [2023-08-04 02:01:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:59,779 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 214 flow [2023-08-04 02:01:59,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-04 02:01:59,779 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2023-08-04 02:01:59,780 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 214 flow [2023-08-04 02:01:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:59,780 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 02:01:59,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:59,981 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,SelfDestructingSolverStorable15 [2023-08-04 02:01:59,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:59,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1944285579, now seen corresponding path program 1 times [2023-08-04 02:01:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590714101] [2023-08-04 02:01:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:00,031 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 02:02:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:00,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590714101] [2023-08-04 02:02:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590714101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860771784] [2023-08-04 02:02:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:00,033 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 02:02:00,036 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 02:02:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:00,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:02:00,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:00,179 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 02:02:00,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:00,198 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 02:02:00,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860771784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:00,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:00,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:02:00,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171246079] [2023-08-04 02:02:00,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:00,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:02:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:02:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:02:00,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 728 [2023-08-04 02:02:00,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 303.125) internal successors, (2425), 8 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:00,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:00,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 728 [2023-08-04 02:02:00,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:04,814 INFO L124 PetriNetUnfolderBase]: 53993/72596 cut-off events. [2023-08-04 02:02:04,814 INFO L125 PetriNetUnfolderBase]: For 13241/13241 co-relation queries the response was YES. [2023-08-04 02:02:04,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156460 conditions, 72596 events. 53993/72596 cut-off events. For 13241/13241 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 409031 event pairs, 20783 based on Foata normal form. 10/61645 useless extension candidates. Maximal degree in co-relation 156408. Up to 70660 conditions per place. [2023-08-04 02:02:05,120 INFO L140 encePairwiseOnDemand]: 720/728 looper letters, 76 selfloop transitions, 13 changer transitions 1/94 dead transitions. [2023-08-04 02:02:05,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 462 flow [2023-08-04 02:02:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:02:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:02:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2478 transitions. [2023-08-04 02:02:05,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254807692307692 [2023-08-04 02:02:05,125 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2478 transitions. [2023-08-04 02:02:05,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2478 transitions. [2023-08-04 02:02:05,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:05,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2478 transitions. [2023-08-04 02:02:05,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 309.75) internal successors, (2478), 8 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:05,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 728.0) internal successors, (6552), 9 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:05,136 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 728.0) internal successors, (6552), 9 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:05,136 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 214 flow. Second operand 8 states and 2478 transitions. [2023-08-04 02:02:05,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 462 flow [2023-08-04 02:02:05,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:05,896 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 278 flow [2023-08-04 02:02:05,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-04 02:02:05,897 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-04 02:02:05,897 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 278 flow [2023-08-04 02:02:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 303.125) internal successors, (2425), 8 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:05,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:05,897 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 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] [2023-08-04 02:02:05,902 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 02:02:06,097 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,SelfDestructingSolverStorable16 [2023-08-04 02:02:06,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:06,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash 337524549, now seen corresponding path program 1 times [2023-08-04 02:02:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865422667] [2023-08-04 02:02:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:06,182 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 02:02:06,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:06,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865422667] [2023-08-04 02:02:06,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865422667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:06,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138087943] [2023-08-04 02:02:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:06,185 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 02:02:06,187 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 02:02:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:06,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:02:06,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:02:06,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:02:06,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138087943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:06,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:06,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-04 02:02:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716058895] [2023-08-04 02:02:06,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 02:02:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 02:02:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-04 02:02:06,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 728 [2023-08-04 02:02:06,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:06,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:06,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 728 [2023-08-04 02:02:06,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:11,458 INFO L124 PetriNetUnfolderBase]: 52037/70121 cut-off events. [2023-08-04 02:02:11,458 INFO L125 PetriNetUnfolderBase]: For 6622/6622 co-relation queries the response was YES. [2023-08-04 02:02:11,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150523 conditions, 70121 events. 52037/70121 cut-off events. For 6622/6622 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 393500 event pairs, 17965 based on Foata normal form. 253/59878 useless extension candidates. Maximal degree in co-relation 150446. Up to 51367 conditions per place. [2023-08-04 02:02:11,764 INFO L140 encePairwiseOnDemand]: 719/728 looper letters, 100 selfloop transitions, 15 changer transitions 1/120 dead transitions. [2023-08-04 02:02:11,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 120 transitions, 614 flow [2023-08-04 02:02:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:02:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:02:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2798 transitions. [2023-08-04 02:02:11,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427045177045177 [2023-08-04 02:02:11,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2798 transitions. [2023-08-04 02:02:11,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2798 transitions. [2023-08-04 02:02:11,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:11,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2798 transitions. [2023-08-04 02:02:11,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 310.8888888888889) internal successors, (2798), 9 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:11,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 728.0) internal successors, (7280), 10 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:11,780 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 728.0) internal successors, (7280), 10 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:11,780 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 278 flow. Second operand 9 states and 2798 transitions. [2023-08-04 02:02:11,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 120 transitions, 614 flow [2023-08-04 02:02:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 577 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-04 02:02:12,499 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 305 flow [2023-08-04 02:02:12,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-08-04 02:02:12,500 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2023-08-04 02:02:12,500 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 305 flow [2023-08-04 02:02:12,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:12,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:12,501 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:12,506 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 02:02:12,701 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,SelfDestructingSolverStorable17 [2023-08-04 02:02:12,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:12,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1578895460, now seen corresponding path program 1 times [2023-08-04 02:02:12,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:12,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801777006] [2023-08-04 02:02:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:12,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:02:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801777006] [2023-08-04 02:02:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801777006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734347904] [2023-08-04 02:02:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:12,825 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 02:02:12,827 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 02:02:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:12,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:12,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:02:12,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:02:13,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734347904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:13,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:13,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:13,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390360642] [2023-08-04 02:02:13,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:13,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:13,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:13,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:13,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:16,439 INFO L124 PetriNetUnfolderBase]: 37015/49913 cut-off events. [2023-08-04 02:02:16,439 INFO L125 PetriNetUnfolderBase]: For 21987/21987 co-relation queries the response was YES. [2023-08-04 02:02:16,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112143 conditions, 49913 events. 37015/49913 cut-off events. For 21987/21987 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 271243 event pairs, 12247 based on Foata normal form. 972/43293 useless extension candidates. Maximal degree in co-relation 112062. Up to 19819 conditions per place. [2023-08-04 02:02:16,685 INFO L140 encePairwiseOnDemand]: 724/728 looper letters, 122 selfloop transitions, 4 changer transitions 0/130 dead transitions. [2023-08-04 02:02:16,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 678 flow [2023-08-04 02:02:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1354 transitions. [2023-08-04 02:02:16,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649725274725275 [2023-08-04 02:02:16,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1354 transitions. [2023-08-04 02:02:16,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1354 transitions. [2023-08-04 02:02:16,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:16,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1354 transitions. [2023-08-04 02:02:16,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 338.5) internal successors, (1354), 4 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:16,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:16,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:16,693 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 305 flow. Second operand 4 states and 1354 transitions. [2023-08-04 02:02:16,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 678 flow [2023-08-04 02:02:17,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 650 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-04 02:02:17,017 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 298 flow [2023-08-04 02:02:17,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=298, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-08-04 02:02:17,018 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2023-08-04 02:02:17,018 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 298 flow [2023-08-04 02:02:17,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:17,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:17,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:17,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 02:02:17,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:17,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:17,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash -518253566, now seen corresponding path program 1 times [2023-08-04 02:02:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:17,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726278975] [2023-08-04 02:02:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:17,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:02:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726278975] [2023-08-04 02:02:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726278975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782897105] [2023-08-04 02:02:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:17,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:17,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:17,311 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 02:02:17,337 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 02:02:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:17,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:17,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:02:17,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:02:17,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782897105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:17,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:17,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547044927] [2023-08-04 02:02:17,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:17,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:17,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:17,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:17,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:17,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:17,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:21,062 INFO L124 PetriNetUnfolderBase]: 36940/49764 cut-off events. [2023-08-04 02:02:21,063 INFO L125 PetriNetUnfolderBase]: For 28820/28820 co-relation queries the response was YES. [2023-08-04 02:02:21,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117624 conditions, 49764 events. 36940/49764 cut-off events. For 28820/28820 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 269106 event pairs, 29876 based on Foata normal form. 26/42213 useless extension candidates. Maximal degree in co-relation 117552. Up to 46530 conditions per place. [2023-08-04 02:02:21,277 INFO L140 encePairwiseOnDemand]: 724/728 looper letters, 119 selfloop transitions, 3 changer transitions 5/131 dead transitions. [2023-08-04 02:02:21,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 672 flow [2023-08-04 02:02:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1354 transitions. [2023-08-04 02:02:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649725274725275 [2023-08-04 02:02:21,280 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1354 transitions. [2023-08-04 02:02:21,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1354 transitions. [2023-08-04 02:02:21,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:21,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1354 transitions. [2023-08-04 02:02:21,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 338.5) internal successors, (1354), 4 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:21,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:21,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:21,285 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 298 flow. Second operand 4 states and 1354 transitions. [2023-08-04 02:02:21,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 672 flow [2023-08-04 02:02:21,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 668 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:21,625 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 300 flow [2023-08-04 02:02:21,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=77, 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=300, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-08-04 02:02:21,625 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2023-08-04 02:02:21,625 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 300 flow [2023-08-04 02:02:21,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:21,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:21,626 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:21,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:21,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:21,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:21,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1456275510, now seen corresponding path program 1 times [2023-08-04 02:02:21,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656119700] [2023-08-04 02:02:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:21,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-08-04 02:02:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656119700] [2023-08-04 02:02:22,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656119700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:22,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:22,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632301003] [2023-08-04 02:02:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:22,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:22,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:22,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:22,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:22,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:26,793 INFO L124 PetriNetUnfolderBase]: 49916/65479 cut-off events. [2023-08-04 02:02:26,793 INFO L125 PetriNetUnfolderBase]: For 41850/41850 co-relation queries the response was YES. [2023-08-04 02:02:26,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154584 conditions, 65479 events. 49916/65479 cut-off events. For 41850/41850 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 375609 event pairs, 6334 based on Foata normal form. 0/57696 useless extension candidates. Maximal degree in co-relation 154510. Up to 40558 conditions per place. [2023-08-04 02:02:27,146 INFO L140 encePairwiseOnDemand]: 721/728 looper letters, 134 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-04 02:02:27,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 144 transitions, 849 flow [2023-08-04 02:02:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1362 transitions. [2023-08-04 02:02:27,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677197802197802 [2023-08-04 02:02:27,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1362 transitions. [2023-08-04 02:02:27,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1362 transitions. [2023-08-04 02:02:27,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:27,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1362 transitions. [2023-08-04 02:02:27,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,152 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 300 flow. Second operand 4 states and 1362 transitions. [2023-08-04 02:02:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 144 transitions, 849 flow [2023-08-04 02:02:27,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 144 transitions, 832 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:02:27,260 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 334 flow [2023-08-04 02:02:27,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-04 02:02:27,260 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2023-08-04 02:02:27,260 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 334 flow [2023-08-04 02:02:27,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:27,261 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 02:02:27,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:27,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2012712326, now seen corresponding path program 1 times [2023-08-04 02:02:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393321337] [2023-08-04 02:02:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:02:27,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:27,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393321337] [2023-08-04 02:02:27,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393321337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:27,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:27,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:27,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758348151] [2023-08-04 02:02:27,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:27,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:27,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:27,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:27,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:27,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:35,278 INFO L124 PetriNetUnfolderBase]: 75718/100544 cut-off events. [2023-08-04 02:02:35,278 INFO L125 PetriNetUnfolderBase]: For 63926/63926 co-relation queries the response was YES. [2023-08-04 02:02:35,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252815 conditions, 100544 events. 75718/100544 cut-off events. For 63926/63926 co-relation queries the response was YES. Maximal size of possible extension queue 2372. Compared 597783 event pairs, 30767 based on Foata normal form. 722/91457 useless extension candidates. Maximal degree in co-relation 252736. Up to 46699 conditions per place. [2023-08-04 02:02:35,850 INFO L140 encePairwiseOnDemand]: 723/728 looper letters, 149 selfloop transitions, 5 changer transitions 0/158 dead transitions. [2023-08-04 02:02:35,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 158 transitions, 937 flow [2023-08-04 02:02:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-08-04 02:02:35,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47081043956043955 [2023-08-04 02:02:35,853 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-08-04 02:02:35,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-08-04 02:02:35,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:35,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-08-04 02:02:35,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.75) internal successors, (1371), 4 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:35,857 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 334 flow. Second operand 4 states and 1371 transitions. [2023-08-04 02:02:35,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 158 transitions, 937 flow [2023-08-04 02:02:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 158 transitions, 937 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:02:36,510 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 370 flow [2023-08-04 02:02:36,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-08-04 02:02:36,511 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 31 predicate places. [2023-08-04 02:02:36,511 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 370 flow [2023-08-04 02:02:36,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:36,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:36,511 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 02:02:36,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:36,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash 450514716, now seen corresponding path program 1 times [2023-08-04 02:02:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910559059] [2023-08-04 02:02:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-04 02:02:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910559059] [2023-08-04 02:02:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910559059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273419331] [2023-08-04 02:02:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:36,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:36,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:36,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:36,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:36,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:51,725 INFO L124 PetriNetUnfolderBase]: 134354/178467 cut-off events. [2023-08-04 02:02:51,725 INFO L125 PetriNetUnfolderBase]: For 193238/193238 co-relation queries the response was YES. [2023-08-04 02:02:52,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478495 conditions, 178467 events. 134354/178467 cut-off events. For 193238/193238 co-relation queries the response was YES. Maximal size of possible extension queue 3914. Compared 1113533 event pairs, 60524 based on Foata normal form. 1414/161459 useless extension candidates. Maximal degree in co-relation 478413. Up to 98618 conditions per place. [2023-08-04 02:02:53,088 INFO L140 encePairwiseOnDemand]: 723/728 looper letters, 154 selfloop transitions, 3 changer transitions 1/162 dead transitions. [2023-08-04 02:02:53,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 162 transitions, 1051 flow [2023-08-04 02:02:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1367 transitions. [2023-08-04 02:02:53,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4694368131868132 [2023-08-04 02:02:53,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1367 transitions. [2023-08-04 02:02:53,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1367 transitions. [2023-08-04 02:02:53,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:53,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1367 transitions. [2023-08-04 02:02:53,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.75) internal successors, (1367), 4 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:53,095 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 370 flow. Second operand 4 states and 1367 transitions. [2023-08-04 02:02:53,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 162 transitions, 1051 flow [2023-08-04 02:02:54,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 162 transitions, 1027 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:54,824 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 388 flow [2023-08-04 02:02:54,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2023-08-04 02:02:54,824 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2023-08-04 02:02:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 388 flow [2023-08-04 02:02:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:54,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:54,825 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:02:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 02:02:54,825 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:54,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1806214532, now seen corresponding path program 2 times [2023-08-04 02:02:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921409009] [2023-08-04 02:02:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:02:55,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:55,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921409009] [2023-08-04 02:02:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921409009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:55,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528736295] [2023-08-04 02:02:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:55,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 728 [2023-08-04 02:02:55,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:55,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:55,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 728 [2023-08-04 02:02:55,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:19,365 INFO L124 PetriNetUnfolderBase]: 215190/284352 cut-off events. [2023-08-04 02:03:19,365 INFO L125 PetriNetUnfolderBase]: For 321531/321531 co-relation queries the response was YES. [2023-08-04 02:03:20,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784890 conditions, 284352 events. 215190/284352 cut-off events. For 321531/321531 co-relation queries the response was YES. Maximal size of possible extension queue 6018. Compared 1869125 event pairs, 60511 based on Foata normal form. 0/268854 useless extension candidates. Maximal degree in co-relation 784806. Up to 175584 conditions per place. [2023-08-04 02:03:21,201 INFO L140 encePairwiseOnDemand]: 721/728 looper letters, 142 selfloop transitions, 8 changer transitions 0/154 dead transitions. [2023-08-04 02:03:21,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1015 flow [2023-08-04 02:03:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1357 transitions. [2023-08-04 02:03:21,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46600274725274726 [2023-08-04 02:03:21,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1357 transitions. [2023-08-04 02:03:21,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1357 transitions. [2023-08-04 02:03:21,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:21,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1357 transitions. [2023-08-04 02:03:21,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.25) internal successors, (1357), 4 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:21,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:21,207 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 728.0) internal successors, (3640), 5 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:21,207 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 388 flow. Second operand 4 states and 1357 transitions. [2023-08-04 02:03:21,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1015 flow [2023-08-04 02:03:23,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 154 transitions, 1010 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:23,464 INFO L231 Difference]: Finished difference. Result has 98 places, 87 transitions, 470 flow [2023-08-04 02:03:23,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=98, PETRI_TRANSITIONS=87} [2023-08-04 02:03:23,465 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 40 predicate places. [2023-08-04 02:03:23,465 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 87 transitions, 470 flow [2023-08-04 02:03:23,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:23,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:23,465 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:03:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 02:03:23,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:23,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 998879418, now seen corresponding path program 1 times [2023-08-04 02:03:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860364543] [2023-08-04 02:03:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-04 02:03:23,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:23,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860364543] [2023-08-04 02:03:23,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860364543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:23,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:23,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:03:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441671736] [2023-08-04 02:03:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:23,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:23,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 728 [2023-08-04 02:03:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 87 transitions, 470 flow. Second operand has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 728 [2023-08-04 02:03:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:59,287 INFO L124 PetriNetUnfolderBase]: 281778/372379 cut-off events. [2023-08-04 02:03:59,287 INFO L125 PetriNetUnfolderBase]: For 524377/524377 co-relation queries the response was YES. [2023-08-04 02:04:00,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067884 conditions, 372379 events. 281778/372379 cut-off events. For 524377/524377 co-relation queries the response was YES. Maximal size of possible extension queue 8145. Compared 2502864 event pairs, 136072 based on Foata normal form. 4763/364715 useless extension candidates. Maximal degree in co-relation 1067794. Up to 279400 conditions per place. [2023-08-04 02:04:02,062 INFO L140 encePairwiseOnDemand]: 719/728 looper letters, 153 selfloop transitions, 13 changer transitions 7/177 dead transitions. [2023-08-04 02:04:02,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 1286 flow [2023-08-04 02:04:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:04:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:04:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1662 transitions. [2023-08-04 02:04:02,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565934065934066 [2023-08-04 02:04:02,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1662 transitions. [2023-08-04 02:04:02,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1662 transitions. [2023-08-04 02:04:02,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:04:02,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1662 transitions. [2023-08-04 02:04:02,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.4) internal successors, (1662), 5 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:02,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 728.0) internal successors, (4368), 6 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:02,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 728.0) internal successors, (4368), 6 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:02,068 INFO L175 Difference]: Start difference. First operand has 98 places, 87 transitions, 470 flow. Second operand 5 states and 1662 transitions. [2023-08-04 02:04:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 1286 flow [2023-08-04 02:04:08,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 177 transitions, 1286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:04:08,392 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 608 flow [2023-08-04 02:04:08,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=728, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-08-04 02:04:08,393 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 48 predicate places. [2023-08-04 02:04:08,393 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 608 flow [2023-08-04 02:04:08,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:08,393 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:04:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 02:04:08,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:08,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1515609145, now seen corresponding path program 1 times [2023-08-04 02:04:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667037886] [2023-08-04 02:04:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-04 02:04:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667037886] [2023-08-04 02:04:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667037886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:04:08,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:04:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:04:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777845286] [2023-08-04 02:04:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:04:08,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:04:08,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:04:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:04:08,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 728 [2023-08-04 02:04:08,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 608 flow. Second operand has 5 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:04:08,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:08,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 728 [2023-08-04 02:04:08,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand