/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:59:20,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:59:20,258 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:59:20,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:59:20,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:59:20,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:59:20,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:59:20,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:59:20,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:59:20,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:59:20,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:59:20,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:59:20,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:59:20,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:59:20,299 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:59:20,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:59:20,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:59:20,300 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:59:20,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:59:20,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:59:20,301 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:59:20,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:59:20,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:59:20,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:59:20,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:59:20,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:59:20,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:59:20,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:59:20,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:59:20,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:59:20,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:59:20,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:59:20,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:59:20,307 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:59:20,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:59:20,307 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:59:20,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:59:20,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:59:20,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:59:20,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:59:20,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:59:20,568 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:59:20,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i [2023-08-03 21:59:21,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:59:22,002 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:59:22,002 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i [2023-08-03 21:59:22,021 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba296d317/09f1084ef2cb4bd1be7881bb01a9d4e4/FLAG18991ea0b [2023-08-03 21:59:22,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba296d317/09f1084ef2cb4bd1be7881bb01a9d4e4 [2023-08-03 21:59:22,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:59:22,047 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:59:22,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:59:22,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:59:22,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:59:22,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7631cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22, skipping insertion in model container [2023-08-03 21:59:22,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,101 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:59:22,460 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i[46865,46878] [2023-08-03 21:59:22,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:59:22,482 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:59:22,509 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 21:59:22,511 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 21:59:22,539 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_bound2.i[46865,46878] [2023-08-03 21:59:22,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:59:22,608 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:59:22,608 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:59:22,614 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:59:22,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22 WrapperNode [2023-08-03 21:59:22,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:59:22,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:59:22,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:59:22,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:59:22,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,676 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2023-08-03 21:59:22,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:59:22,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:59:22,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:59:22,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:59:22,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:59:22,721 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:59:22,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:59:22,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:59:22,723 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (1/1) ... [2023-08-03 21:59:22,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:59:22,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:22,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 21:59:22,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 21:59:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 21:59:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-08-03 21:59:22,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-08-03 21:59:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:59:22,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:59:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:59:22,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:59:22,794 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:59:22,924 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:59:22,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:59:23,052 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:59:23,081 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:59:23,081 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 21:59:23,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:59:23 BoogieIcfgContainer [2023-08-03 21:59:23,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:59:23,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:59:23,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:59:23,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:59:23,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:59:22" (1/3) ... [2023-08-03 21:59:23,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353fcb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:59:23, skipping insertion in model container [2023-08-03 21:59:23,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:59:22" (2/3) ... [2023-08-03 21:59:23,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353fcb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:59:23, skipping insertion in model container [2023-08-03 21:59:23,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:59:23" (3/3) ... [2023-08-03 21:59:23,114 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-lit_sssc12_bound2.i [2023-08-03 21:59:23,124 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:59:23,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:59:23,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:59:23,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:59:23,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:59:23,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,314 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-03 21:59:23,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:59:23,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-08-03 21:59:23,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,331 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:59:23,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 80 transitions, 165 flow [2023-08-03 21:59:23,375 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-03 21:59:23,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:59:23,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-08-03 21:59:23,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 1054 [2023-08-03 21:59:26,230 INFO L134 LiptonReduction]: Checked pairs total: 863 [2023-08-03 21:59:26,231 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 21:59:26,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:59:26,250 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;@6cd6e5a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:59:26,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:59:26,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:59:26,254 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 21:59:26,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:59:26,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:26,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:59:26,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:59:26,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1938710832, now seen corresponding path program 1 times [2023-08-03 21:59:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:26,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114699323] [2023-08-03 21:59:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:59:26,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:59:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:59:26,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:59:26,497 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:59:26,498 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:59:26,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:59:26,501 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:59:26,508 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:59:26,509 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:59:26,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:59:26,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:59:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,558 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 21:59:26,559 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:59:26,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 21:59:26,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:59:26,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:26,581 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 21:59:26,582 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:59:26,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 21:59:26,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-03 21:59:28,980 INFO L134 LiptonReduction]: Checked pairs total: 6987 [2023-08-03 21:59:28,981 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 21:59:28,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:59:28,984 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;@6cd6e5a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:59:28,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:59:28,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:59:28,988 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-03 21:59:28,988 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:59:28,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:28,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:59:28,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:59:28,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1357249054, now seen corresponding path program 1 times [2023-08-03 21:59:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431431297] [2023-08-03 21:59:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431431297] [2023-08-03 21:59:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431431297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:29,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222356054] [2023-08-03 21:59:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:29,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:29,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:29,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:29,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:59:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:29,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:59:29,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:29,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:59:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222356054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:29,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:59:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:59:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369095163] [2023-08-03 21:59:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:59:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:59:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:59:29,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 221 [2023-08-03 21:59:29,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:29,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:29,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 221 [2023-08-03 21:59:29,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:29,477 INFO L124 PetriNetUnfolderBase]: 320/522 cut-off events. [2023-08-03 21:59:29,477 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 21:59:29,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 522 events. 320/522 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1887 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 205. Up to 338 conditions per place. [2023-08-03 21:59:29,486 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-03 21:59:29,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 55 transitions, 218 flow [2023-08-03 21:59:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:59:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:59:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 516 transitions. [2023-08-03 21:59:29,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669683257918552 [2023-08-03 21:59:29,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 516 transitions. [2023-08-03 21:59:29,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 516 transitions. [2023-08-03 21:59:29,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:29,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 516 transitions. [2023-08-03 21:59:29,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.2) internal successors, (516), 5 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:29,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:29,513 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:29,514 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 5 states and 516 transitions. [2023-08-03 21:59:29,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 55 transitions, 218 flow [2023-08-03 21:59:29,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 55 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:59:29,518 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-03 21:59:29,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-03 21:59:29,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 21:59:29,523 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-03 21:59:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:29,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:59:29,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:59:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:29,729 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:59:29,729 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:59:29,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,744 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 21:59:29,744 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:59:29,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 21:59:29,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:59:29,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 236 flow [2023-08-03 21:59:29,758 INFO L124 PetriNetUnfolderBase]: 12/139 cut-off events. [2023-08-03 21:59:29,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:59:29,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 139 events. 12/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2023-08-03 21:59:29,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-03 21:59:32,084 INFO L134 LiptonReduction]: Checked pairs total: 7106 [2023-08-03 21:59:32,084 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-03 21:59:32,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:59:32,087 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;@6cd6e5a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:59:32,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:59:32,089 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:59:32,089 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-08-03 21:59:32,089 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:59:32,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:32,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:32,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:32,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1007098364, now seen corresponding path program 1 times [2023-08-03 21:59:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:32,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890280392] [2023-08-03 21:59:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:32,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890280392] [2023-08-03 21:59:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890280392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:32,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:32,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:59:32,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462079291] [2023-08-03 21:59:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:59:32,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:59:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:59:32,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2023-08-03 21:59:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2023-08-03 21:59:32,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:32,311 INFO L124 PetriNetUnfolderBase]: 685/1109 cut-off events. [2023-08-03 21:59:32,311 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 21:59:32,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1109 events. 685/1109 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5147 event pairs, 312 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 997. Up to 628 conditions per place. [2023-08-03 21:59:32,316 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 36 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-03 21:59:32,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 177 flow [2023-08-03 21:59:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:59:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:59:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-03 21:59:32,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809741248097412 [2023-08-03 21:59:32,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-03 21:59:32,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-03 21:59:32,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:32,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-03 21:59:32,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,323 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 316 transitions. [2023-08-03 21:59:32,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 177 flow [2023-08-03 21:59:32,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 175 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 21:59:32,325 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-08-03 21:59:32,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-03 21:59:32,326 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-03 21:59:32,326 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-08-03 21:59:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:32,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:59:32,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:32,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash 484824278, now seen corresponding path program 1 times [2023-08-03 21:59:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:32,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800446875] [2023-08-03 21:59:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:32,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:32,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800446875] [2023-08-03 21:59:32,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800446875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:32,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:32,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:59:32,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779385471] [2023-08-03 21:59:32,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:59:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:59:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:59:32,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 219 [2023-08-03 21:59:32,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:32,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 219 [2023-08-03 21:59:32,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:32,777 INFO L124 PetriNetUnfolderBase]: 1136/1892 cut-off events. [2023-08-03 21:59:32,778 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-03 21:59:32,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 1892 events. 1136/1892 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10072 event pairs, 243 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 2197. Up to 692 conditions per place. [2023-08-03 21:59:32,787 INFO L140 encePairwiseOnDemand]: 208/219 looper letters, 78 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2023-08-03 21:59:32,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 93 transitions, 419 flow [2023-08-03 21:59:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:59:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:59:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 597 transitions. [2023-08-03 21:59:32,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454337899543379 [2023-08-03 21:59:32,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 597 transitions. [2023-08-03 21:59:32,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 597 transitions. [2023-08-03 21:59:32,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:32,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 597 transitions. [2023-08-03 21:59:32,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,795 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 6 states and 597 transitions. [2023-08-03 21:59:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 93 transitions, 419 flow [2023-08-03 21:59:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 93 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:59:32,798 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 159 flow [2023-08-03 21:59:32,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-08-03 21:59:32,799 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-08-03 21:59:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 159 flow [2023-08-03 21:59:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:32,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:32,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:59:32,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:32,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1614209652, now seen corresponding path program 1 times [2023-08-03 21:59:32,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:32,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203298532] [2023-08-03 21:59:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203298532] [2023-08-03 21:59:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203298532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:32,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:32,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:59:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587347247] [2023-08-03 21:59:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:59:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:59:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:59:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2023-08-03 21:59:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2023-08-03 21:59:32,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:33,079 INFO L124 PetriNetUnfolderBase]: 1275/2085 cut-off events. [2023-08-03 21:59:33,079 INFO L125 PetriNetUnfolderBase]: For 984/1019 co-relation queries the response was YES. [2023-08-03 21:59:33,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5291 conditions, 2085 events. 1275/2085 cut-off events. For 984/1019 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10975 event pairs, 641 based on Foata normal form. 31/1708 useless extension candidates. Maximal degree in co-relation 2085. Up to 1369 conditions per place. [2023-08-03 21:59:33,090 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-03 21:59:33,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 320 flow [2023-08-03 21:59:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:59:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:59:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-03 21:59:33,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794520547945205 [2023-08-03 21:59:33,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-03 21:59:33,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-03 21:59:33,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:33,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-03 21:59:33,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:33,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:33,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:33,095 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 159 flow. Second operand 3 states and 315 transitions. [2023-08-03 21:59:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 320 flow [2023-08-03 21:59:33,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:59:33,098 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 165 flow [2023-08-03 21:59:33,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-03 21:59:33,099 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-03 21:59:33,099 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 165 flow [2023-08-03 21:59:33,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:33,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:33,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:33,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:59:33,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:33,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2144651912, now seen corresponding path program 1 times [2023-08-03 21:59:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:33,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623215777] [2023-08-03 21:59:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:33,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623215777] [2023-08-03 21:59:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623215777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834997248] [2023-08-03 21:59:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:33,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:33,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:59:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:33,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 21:59:33,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:33,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:33,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834997248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:33,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:33,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-03 21:59:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414301567] [2023-08-03 21:59:33,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:33,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 21:59:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 21:59:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-03 21:59:33,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2023-08-03 21:59:33,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 165 flow. Second operand has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:33,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:33,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2023-08-03 21:59:33,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:34,721 INFO L124 PetriNetUnfolderBase]: 2298/3926 cut-off events. [2023-08-03 21:59:34,721 INFO L125 PetriNetUnfolderBase]: For 1989/2021 co-relation queries the response was YES. [2023-08-03 21:59:34,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10384 conditions, 3926 events. 2298/3926 cut-off events. For 1989/2021 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24731 event pairs, 172 based on Foata normal form. 120/3499 useless extension candidates. Maximal degree in co-relation 9449. Up to 843 conditions per place. [2023-08-03 21:59:34,743 INFO L140 encePairwiseOnDemand]: 205/219 looper letters, 192 selfloop transitions, 65 changer transitions 12/274 dead transitions. [2023-08-03 21:59:34,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 274 transitions, 1518 flow [2023-08-03 21:59:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-03 21:59:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-03 21:59:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2503 transitions. [2023-08-03 21:59:34,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233045831219347 [2023-08-03 21:59:34,751 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2503 transitions. [2023-08-03 21:59:34,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2503 transitions. [2023-08-03 21:59:34,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:34,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2503 transitions. [2023-08-03 21:59:34,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.70370370370371) internal successors, (2503), 27 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:34,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 219.0) internal successors, (6132), 28 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:34,769 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 219.0) internal successors, (6132), 28 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:34,769 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 165 flow. Second operand 27 states and 2503 transitions. [2023-08-03 21:59:34,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 274 transitions, 1518 flow [2023-08-03 21:59:34,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 274 transitions, 1498 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:59:34,777 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 716 flow [2023-08-03 21:59:34,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=716, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2023-08-03 21:59:34,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2023-08-03 21:59:34,778 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 716 flow [2023-08-03 21:59:34,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.875) internal successors, (1342), 16 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:34,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:34,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:34,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 21:59:34,983 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,SelfDestructingSolverStorable5 [2023-08-03 21:59:34,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:34,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash -82160294, now seen corresponding path program 1 times [2023-08-03 21:59:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:34,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143909285] [2023-08-03 21:59:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:35,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:35,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143909285] [2023-08-03 21:59:35,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143909285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:35,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:35,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:59:35,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852663906] [2023-08-03 21:59:35,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:35,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:59:35,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:59:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:59:35,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 219 [2023-08-03 21:59:35,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 716 flow. Second operand has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:35,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:35,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 219 [2023-08-03 21:59:35,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:35,848 INFO L124 PetriNetUnfolderBase]: 3594/6018 cut-off events. [2023-08-03 21:59:35,848 INFO L125 PetriNetUnfolderBase]: For 19941/19949 co-relation queries the response was YES. [2023-08-03 21:59:35,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20791 conditions, 6018 events. 3594/6018 cut-off events. For 19941/19949 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 39795 event pairs, 732 based on Foata normal form. 8/5340 useless extension candidates. Maximal degree in co-relation 17666. Up to 3252 conditions per place. [2023-08-03 21:59:35,898 INFO L140 encePairwiseOnDemand]: 210/219 looper letters, 154 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-08-03 21:59:35,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 178 transitions, 1513 flow [2023-08-03 21:59:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:59:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:59:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 585 transitions. [2023-08-03 21:59:35,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452054794520548 [2023-08-03 21:59:35,904 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 585 transitions. [2023-08-03 21:59:35,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 585 transitions. [2023-08-03 21:59:35,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:35,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 585 transitions. [2023-08-03 21:59:35,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.5) internal successors, (585), 6 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:35,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:35,908 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:35,909 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 716 flow. Second operand 6 states and 585 transitions. [2023-08-03 21:59:35,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 178 transitions, 1513 flow [2023-08-03 21:59:35,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 178 transitions, 1376 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-03 21:59:35,987 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 694 flow [2023-08-03 21:59:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2023-08-03 21:59:35,989 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-03 21:59:35,989 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 694 flow [2023-08-03 21:59:35,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:35,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:35,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:35,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:59:35,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:35,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash -607211178, now seen corresponding path program 2 times [2023-08-03 21:59:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:35,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769155954] [2023-08-03 21:59:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:35,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769155954] [2023-08-03 21:59:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769155954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545479409] [2023-08-03 21:59:36,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:59:36,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:36,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:36,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:36,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:59:36,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:59:36,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:59:36,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 21:59:36,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:36,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:36,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545479409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:36,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:36,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-03 21:59:36,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859928196] [2023-08-03 21:59:36,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:36,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-03 21:59:36,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-03 21:59:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-03 21:59:37,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 219 [2023-08-03 21:59:37,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 694 flow. Second operand has 24 states, 24 states have (on average 85.66666666666667) internal successors, (2056), 24 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:37,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:37,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 219 [2023-08-03 21:59:37,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:39,585 INFO L124 PetriNetUnfolderBase]: 6967/11689 cut-off events. [2023-08-03 21:59:39,586 INFO L125 PetriNetUnfolderBase]: For 100786/100818 co-relation queries the response was YES. [2023-08-03 21:59:39,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38882 conditions, 11689 events. 6967/11689 cut-off events. For 100786/100818 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 83820 event pairs, 364 based on Foata normal form. 988/11367 useless extension candidates. Maximal degree in co-relation 37999. Up to 1860 conditions per place. [2023-08-03 21:59:39,653 INFO L140 encePairwiseOnDemand]: 208/219 looper letters, 348 selfloop transitions, 102 changer transitions 14/471 dead transitions. [2023-08-03 21:59:39,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 471 transitions, 3463 flow [2023-08-03 21:59:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-03 21:59:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-03 21:59:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3228 transitions. [2023-08-03 21:59:39,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43352135374697826 [2023-08-03 21:59:39,663 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3228 transitions. [2023-08-03 21:59:39,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3228 transitions. [2023-08-03 21:59:39,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:39,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3228 transitions. [2023-08-03 21:59:39,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 94.94117647058823) internal successors, (3228), 34 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:39,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 219.0) internal successors, (7665), 35 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:39,684 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 219.0) internal successors, (7665), 35 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:39,684 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 694 flow. Second operand 34 states and 3228 transitions. [2023-08-03 21:59:39,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 471 transitions, 3463 flow [2023-08-03 21:59:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 471 transitions, 3439 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:59:39,860 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1655 flow [2023-08-03 21:59:39,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1655, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2023-08-03 21:59:39,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2023-08-03 21:59:39,862 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1655 flow [2023-08-03 21:59:39,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.66666666666667) internal successors, (2056), 24 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:39,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:39,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:39,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:40,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:40,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1747999210, now seen corresponding path program 1 times [2023-08-03 21:59:40,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765518012] [2023-08-03 21:59:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:40,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765518012] [2023-08-03 21:59:40,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765518012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606767535] [2023-08-03 21:59:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:40,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:40,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:40,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:59:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:40,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 21:59:40,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:40,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606767535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:40,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-03 21:59:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398017175] [2023-08-03 21:59:40,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 21:59:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 21:59:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-03 21:59:40,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2023-08-03 21:59:40,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1655 flow. Second operand has 16 states, 16 states have (on average 84.25) internal successors, (1348), 16 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:40,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:40,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2023-08-03 21:59:40,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:42,816 INFO L124 PetriNetUnfolderBase]: 9947/16430 cut-off events. [2023-08-03 21:59:42,816 INFO L125 PetriNetUnfolderBase]: For 116336/116352 co-relation queries the response was YES. [2023-08-03 21:59:42,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60329 conditions, 16430 events. 9947/16430 cut-off events. For 116336/116352 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 122200 event pairs, 1130 based on Foata normal form. 120/14741 useless extension candidates. Maximal degree in co-relation 58695. Up to 6111 conditions per place. [2023-08-03 21:59:42,920 INFO L140 encePairwiseOnDemand]: 205/219 looper letters, 408 selfloop transitions, 119 changer transitions 12/548 dead transitions. [2023-08-03 21:59:42,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 548 transitions, 5648 flow [2023-08-03 21:59:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-03 21:59:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-03 21:59:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2496 transitions. [2023-08-03 21:59:42,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42212075088787415 [2023-08-03 21:59:42,930 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2496 transitions. [2023-08-03 21:59:42,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2496 transitions. [2023-08-03 21:59:42,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:42,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2496 transitions. [2023-08-03 21:59:42,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:42,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 219.0) internal successors, (6132), 28 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:42,947 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 219.0) internal successors, (6132), 28 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:42,948 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1655 flow. Second operand 27 states and 2496 transitions. [2023-08-03 21:59:42,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 548 transitions, 5648 flow [2023-08-03 21:59:43,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 548 transitions, 4954 flow, removed 303 selfloop flow, removed 6 redundant places. [2023-08-03 21:59:43,458 INFO L231 Difference]: Finished difference. Result has 169 places, 257 transitions, 2403 flow [2023-08-03 21:59:43,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2403, PETRI_PLACES=169, PETRI_TRANSITIONS=257} [2023-08-03 21:59:43,459 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-08-03 21:59:43,459 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 257 transitions, 2403 flow [2023-08-03 21:59:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.25) internal successors, (1348), 16 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:43,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:43,460 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:43,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:43,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:43,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1832978086, now seen corresponding path program 2 times [2023-08-03 21:59:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021211430] [2023-08-03 21:59:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:43,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:43,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021211430] [2023-08-03 21:59:43,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021211430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278583660] [2023-08-03 21:59:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:59:43,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:43,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:59:43,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:59:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:59:43,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-03 21:59:43,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:44,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:59:44,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278583660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:44,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:59:44,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2023-08-03 21:59:44,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620922237] [2023-08-03 21:59:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:44,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 21:59:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 21:59:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-03 21:59:44,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2023-08-03 21:59:44,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 257 transitions, 2403 flow. Second operand has 10 states, 10 states have (on average 82.6) internal successors, (826), 10 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:44,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:44,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2023-08-03 21:59:44,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:47,002 INFO L124 PetriNetUnfolderBase]: 12334/19950 cut-off events. [2023-08-03 21:59:47,002 INFO L125 PetriNetUnfolderBase]: For 185502/185546 co-relation queries the response was YES. [2023-08-03 21:59:47,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78522 conditions, 19950 events. 12334/19950 cut-off events. For 185502/185546 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 144766 event pairs, 2440 based on Foata normal form. 272/18320 useless extension candidates. Maximal degree in co-relation 75362. Up to 9954 conditions per place. [2023-08-03 21:59:47,247 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 345 selfloop transitions, 38 changer transitions 94/485 dead transitions. [2023-08-03 21:59:47,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 485 transitions, 5189 flow [2023-08-03 21:59:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 21:59:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 21:59:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1559 transitions. [2023-08-03 21:59:47,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41874832124630673 [2023-08-03 21:59:47,252 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1559 transitions. [2023-08-03 21:59:47,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1559 transitions. [2023-08-03 21:59:47,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:47,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1559 transitions. [2023-08-03 21:59:47,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.70588235294117) internal successors, (1559), 17 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:47,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:47,261 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:47,261 INFO L175 Difference]: Start difference. First operand has 169 places, 257 transitions, 2403 flow. Second operand 17 states and 1559 transitions. [2023-08-03 21:59:47,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 485 transitions, 5189 flow [2023-08-03 21:59:47,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 485 transitions, 5046 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-08-03 21:59:47,952 INFO L231 Difference]: Finished difference. Result has 190 places, 217 transitions, 2074 flow [2023-08-03 21:59:47,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2074, PETRI_PLACES=190, PETRI_TRANSITIONS=217} [2023-08-03 21:59:47,953 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2023-08-03 21:59:47,953 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 217 transitions, 2074 flow [2023-08-03 21:59:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.6) internal successors, (826), 10 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:47,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:47,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:47,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:48,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 21:59:48,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:48,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 355592098, now seen corresponding path program 1 times [2023-08-03 21:59:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:48,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300994132] [2023-08-03 21:59:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:48,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:48,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:48,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300994132] [2023-08-03 21:59:48,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300994132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:48,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:59:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692362997] [2023-08-03 21:59:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:59:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:59:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:59:48,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 219 [2023-08-03 21:59:48,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 217 transitions, 2074 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:48,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:48,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 219 [2023-08-03 21:59:48,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:48,950 INFO L124 PetriNetUnfolderBase]: 3055/5283 cut-off events. [2023-08-03 21:59:48,951 INFO L125 PetriNetUnfolderBase]: For 76350/76358 co-relation queries the response was YES. [2023-08-03 21:59:48,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22732 conditions, 5283 events. 3055/5283 cut-off events. For 76350/76358 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34150 event pairs, 1574 based on Foata normal form. 32/4829 useless extension candidates. Maximal degree in co-relation 22657. Up to 3306 conditions per place. [2023-08-03 21:59:48,991 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 145 selfloop transitions, 28 changer transitions 0/182 dead transitions. [2023-08-03 21:59:48,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 182 transitions, 1995 flow [2023-08-03 21:59:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:59:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:59:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-03 21:59:48,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487062404870624 [2023-08-03 21:59:48,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-03 21:59:48,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-03 21:59:48,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:48,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-03 21:59:48,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:48,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:48,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:48,995 INFO L175 Difference]: Start difference. First operand has 190 places, 217 transitions, 2074 flow. Second operand 3 states and 320 transitions. [2023-08-03 21:59:48,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 182 transitions, 1995 flow [2023-08-03 21:59:49,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 182 transitions, 1699 flow, removed 100 selfloop flow, removed 30 redundant places. [2023-08-03 21:59:49,262 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1213 flow [2023-08-03 21:59:49,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1213, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2023-08-03 21:59:49,262 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-08-03 21:59:49,262 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1213 flow [2023-08-03 21:59:49,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:49,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:49,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 21:59:49,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:49,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1203905226, now seen corresponding path program 1 times [2023-08-03 21:59:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:49,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234335522] [2023-08-03 21:59:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:49,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234335522] [2023-08-03 21:59:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234335522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769945947] [2023-08-03 21:59:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:49,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:49,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:49,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:59:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:49,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 21:59:49,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:49,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:59:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769945947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:49,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:59:49,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:59:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735895862] [2023-08-03 21:59:49,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:49,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:59:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:49,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:59:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:59:49,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2023-08-03 21:59:49,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1213 flow. Second operand has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:49,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:49,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2023-08-03 21:59:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:50,256 INFO L124 PetriNetUnfolderBase]: 3628/6026 cut-off events. [2023-08-03 21:59:50,256 INFO L125 PetriNetUnfolderBase]: For 69164/69164 co-relation queries the response was YES. [2023-08-03 21:59:50,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23155 conditions, 6026 events. 3628/6026 cut-off events. For 69164/69164 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 37602 event pairs, 564 based on Foata normal form. 92/5544 useless extension candidates. Maximal degree in co-relation 23100. Up to 2748 conditions per place. [2023-08-03 21:59:50,287 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 227 selfloop transitions, 12 changer transitions 1/246 dead transitions. [2023-08-03 21:59:50,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 246 transitions, 2447 flow [2023-08-03 21:59:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:59:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:59:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 811 transitions. [2023-08-03 21:59:50,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41146626078132925 [2023-08-03 21:59:50,289 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 811 transitions. [2023-08-03 21:59:50,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 811 transitions. [2023-08-03 21:59:50,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:50,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 811 transitions. [2023-08-03 21:59:50,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.11111111111111) internal successors, (811), 9 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:50,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:50,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:50,293 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1213 flow. Second operand 9 states and 811 transitions. [2023-08-03 21:59:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 246 transitions, 2447 flow [2023-08-03 21:59:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 246 transitions, 2406 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-03 21:59:50,448 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1222 flow [2023-08-03 21:59:50,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1222, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2023-08-03 21:59:50,449 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-08-03 21:59:50,449 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1222 flow [2023-08-03 21:59:50,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:50,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:50,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:50,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:50,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:50,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1856310889, now seen corresponding path program 1 times [2023-08-03 21:59:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:50,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169560318] [2023-08-03 21:59:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:50,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169560318] [2023-08-03 21:59:50,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169560318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:50,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:50,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:59:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409595339] [2023-08-03 21:59:50,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:50,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:59:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:59:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:59:50,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2023-08-03 21:59:50,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1222 flow. Second operand has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:50,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:50,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2023-08-03 21:59:50,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:51,669 INFO L124 PetriNetUnfolderBase]: 3768/6276 cut-off events. [2023-08-03 21:59:51,669 INFO L125 PetriNetUnfolderBase]: For 80796/80796 co-relation queries the response was YES. [2023-08-03 21:59:51,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24336 conditions, 6276 events. 3768/6276 cut-off events. For 80796/80796 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 39861 event pairs, 850 based on Foata normal form. 40/5725 useless extension candidates. Maximal degree in co-relation 24280. Up to 4865 conditions per place. [2023-08-03 21:59:51,711 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 196 selfloop transitions, 12 changer transitions 2/216 dead transitions. [2023-08-03 21:59:51,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 216 transitions, 1932 flow [2023-08-03 21:59:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:59:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:59:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 803 transitions. [2023-08-03 21:59:51,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-03 21:59:51,713 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 803 transitions. [2023-08-03 21:59:51,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 803 transitions. [2023-08-03 21:59:51,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:51,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 803 transitions. [2023-08-03 21:59:51,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.22222222222223) internal successors, (803), 9 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:51,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:51,717 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:51,717 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1222 flow. Second operand 9 states and 803 transitions. [2023-08-03 21:59:51,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 216 transitions, 1932 flow [2023-08-03 21:59:51,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 1912 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-03 21:59:51,896 INFO L231 Difference]: Finished difference. Result has 155 places, 162 transitions, 1244 flow [2023-08-03 21:59:51,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1244, PETRI_PLACES=155, PETRI_TRANSITIONS=162} [2023-08-03 21:59:51,896 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-03 21:59:51,896 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 162 transitions, 1244 flow [2023-08-03 21:59:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:51,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:51,897 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:51,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:59:51,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:51,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1641661462, now seen corresponding path program 3 times [2023-08-03 21:59:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070546179] [2023-08-03 21:59:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:51,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:59:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070546179] [2023-08-03 21:59:52,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070546179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:52,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698168517] [2023-08-03 21:59:52,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:59:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:52,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:52,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:59:52,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-03 21:59:52,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:59:52,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-03 21:59:52,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-03 21:59:52,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:59:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698168517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:52,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:59:52,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-08-03 21:59:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036569662] [2023-08-03 21:59:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:59:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:59:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-03 21:59:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2023-08-03 21:59:52,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 162 transitions, 1244 flow. Second operand has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:52,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:52,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2023-08-03 21:59:52,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:53,085 INFO L124 PetriNetUnfolderBase]: 3489/5871 cut-off events. [2023-08-03 21:59:53,085 INFO L125 PetriNetUnfolderBase]: For 64828/64828 co-relation queries the response was YES. [2023-08-03 21:59:53,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 5871 events. 3489/5871 cut-off events. For 64828/64828 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 37938 event pairs, 365 based on Foata normal form. 124/5446 useless extension candidates. Maximal degree in co-relation 19070. Up to 4126 conditions per place. [2023-08-03 21:59:53,116 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 73 selfloop transitions, 14 changer transitions 124/215 dead transitions. [2023-08-03 21:59:53,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 215 transitions, 1882 flow [2023-08-03 21:59:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 21:59:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 21:59:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 721 transitions. [2023-08-03 21:59:53,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115296803652968 [2023-08-03 21:59:53,117 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 721 transitions. [2023-08-03 21:59:53,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 721 transitions. [2023-08-03 21:59:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:53,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 721 transitions. [2023-08-03 21:59:53,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.125) internal successors, (721), 8 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:53,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:53,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:53,120 INFO L175 Difference]: Start difference. First operand has 155 places, 162 transitions, 1244 flow. Second operand 8 states and 721 transitions. [2023-08-03 21:59:53,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 215 transitions, 1882 flow [2023-08-03 21:59:53,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 215 transitions, 1654 flow, removed 15 selfloop flow, removed 36 redundant places. [2023-08-03 21:59:53,201 INFO L231 Difference]: Finished difference. Result has 125 places, 60 transitions, 390 flow [2023-08-03 21:59:53,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=125, PETRI_TRANSITIONS=60} [2023-08-03 21:59:53,202 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2023-08-03 21:59:53,202 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 60 transitions, 390 flow [2023-08-03 21:59:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:53,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:53,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:53,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:53,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 818519194, now seen corresponding path program 1 times [2023-08-03 21:59:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057483210] [2023-08-03 21:59:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:53,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:53,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057483210] [2023-08-03 21:59:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057483210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:53,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550244857] [2023-08-03 21:59:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:53,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:53,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:59:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:53,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-03 21:59:53,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:53,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:53,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550244857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:53,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:53,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-03 21:59:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702023512] [2023-08-03 21:59:53,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 21:59:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 21:59:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-03 21:59:53,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2023-08-03 21:59:53,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 60 transitions, 390 flow. Second operand has 15 states, 15 states have (on average 83.8) internal successors, (1257), 15 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:53,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:53,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2023-08-03 21:59:53,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:54,362 INFO L124 PetriNetUnfolderBase]: 1818/3016 cut-off events. [2023-08-03 21:59:54,362 INFO L125 PetriNetUnfolderBase]: For 12299/12299 co-relation queries the response was YES. [2023-08-03 21:59:54,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10849 conditions, 3016 events. 1818/3016 cut-off events. For 12299/12299 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 15361 event pairs, 44 based on Foata normal form. 264/3005 useless extension candidates. Maximal degree in co-relation 10825. Up to 595 conditions per place. [2023-08-03 21:59:54,377 INFO L140 encePairwiseOnDemand]: 209/219 looper letters, 162 selfloop transitions, 17 changer transitions 0/183 dead transitions. [2023-08-03 21:59:54,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 183 transitions, 1345 flow [2023-08-03 21:59:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:59:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:59:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1212 transitions. [2023-08-03 21:59:54,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953033268101761 [2023-08-03 21:59:54,381 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1212 transitions. [2023-08-03 21:59:54,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1212 transitions. [2023-08-03 21:59:54,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:54,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1212 transitions. [2023-08-03 21:59:54,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.57142857142857) internal successors, (1212), 14 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:54,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:54,386 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:54,386 INFO L175 Difference]: Start difference. First operand has 125 places, 60 transitions, 390 flow. Second operand 14 states and 1212 transitions. [2023-08-03 21:59:54,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 183 transitions, 1345 flow [2023-08-03 21:59:54,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 183 transitions, 1204 flow, removed 29 selfloop flow, removed 27 redundant places. [2023-08-03 21:59:54,458 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 365 flow [2023-08-03 21:59:54,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=365, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-08-03 21:59:54,458 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-08-03 21:59:54,459 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 365 flow [2023-08-03 21:59:54,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.8) internal successors, (1257), 15 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:54,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:54,459 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:54,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:54,659 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,SelfDestructingSolverStorable14 [2023-08-03 21:59:54,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:54,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1976989866, now seen corresponding path program 2 times [2023-08-03 21:59:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078571988] [2023-08-03 21:59:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:54,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:54,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078571988] [2023-08-03 21:59:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078571988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:54,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464323199] [2023-08-03 21:59:54,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:59:54,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:54,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:54,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:59:54,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:59:54,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:59:54,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 21:59:54,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:55,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464323199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:55,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-03 21:59:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396542838] [2023-08-03 21:59:55,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 21:59:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 21:59:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-08-03 21:59:56,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2023-08-03 21:59:56,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 365 flow. Second operand has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:56,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:56,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2023-08-03 21:59:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:57,117 INFO L124 PetriNetUnfolderBase]: 2742/4468 cut-off events. [2023-08-03 21:59:57,117 INFO L125 PetriNetUnfolderBase]: For 4905/4905 co-relation queries the response was YES. [2023-08-03 21:59:57,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14065 conditions, 4468 events. 2742/4468 cut-off events. For 4905/4905 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 22993 event pairs, 0 based on Foata normal form. 528/4589 useless extension candidates. Maximal degree in co-relation 14050. Up to 1057 conditions per place. [2023-08-03 21:59:57,134 INFO L140 encePairwiseOnDemand]: 208/219 looper letters, 251 selfloop transitions, 28 changer transitions 0/283 dead transitions. [2023-08-03 21:59:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 283 transitions, 1910 flow [2023-08-03 21:59:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-03 21:59:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-03 21:59:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1823 transitions. [2023-08-03 21:59:57,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963905196781909 [2023-08-03 21:59:57,136 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1823 transitions. [2023-08-03 21:59:57,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1823 transitions. [2023-08-03 21:59:57,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:57,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1823 transitions. [2023-08-03 21:59:57,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.80952380952381) internal successors, (1823), 21 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,141 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,141 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 365 flow. Second operand 21 states and 1823 transitions. [2023-08-03 21:59:57,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 283 transitions, 1910 flow [2023-08-03 21:59:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 283 transitions, 1859 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-03 21:59:57,152 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 432 flow [2023-08-03 21:59:57,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=432, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2023-08-03 21:59:57,153 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-08-03 21:59:57,153 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 432 flow [2023-08-03 21:59:57,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:57,153 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:57,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 21:59:57,354 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,SelfDestructingSolverStorable15 [2023-08-03 21:59:57,354 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:57,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1588523690, now seen corresponding path program 3 times [2023-08-03 21:59:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824788262] [2023-08-03 21:59:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:57,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:57,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824788262] [2023-08-03 21:59:57,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824788262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:57,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:57,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-03 21:59:57,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699086877] [2023-08-03 21:59:57,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:57,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-03 21:59:57,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-03 21:59:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-08-03 21:59:57,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 219 [2023-08-03 21:59:57,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 432 flow. Second operand has 14 states, 14 states have (on average 86.85714285714286) internal successors, (1216), 14 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:57,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 219 [2023-08-03 21:59:57,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:58,078 INFO L124 PetriNetUnfolderBase]: 2647/4283 cut-off events. [2023-08-03 21:59:58,078 INFO L125 PetriNetUnfolderBase]: For 5536/5536 co-relation queries the response was YES. [2023-08-03 21:59:58,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 4283 events. 2647/4283 cut-off events. For 5536/5536 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 21909 event pairs, 175 based on Foata normal form. 176/4053 useless extension candidates. Maximal degree in co-relation 14102. Up to 800 conditions per place. [2023-08-03 21:59:58,089 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 0 selfloop transitions, 0 changer transitions 262/262 dead transitions. [2023-08-03 21:59:58,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 262 transitions, 1815 flow [2023-08-03 21:59:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 21:59:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 21:59:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1370 transitions. [2023-08-03 21:59:58,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170471841704718 [2023-08-03 21:59:58,091 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1370 transitions. [2023-08-03 21:59:58,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1370 transitions. [2023-08-03 21:59:58,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:58,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1370 transitions. [2023-08-03 21:59:58,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.33333333333333) internal successors, (1370), 15 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:58,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:58,096 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:58,096 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 432 flow. Second operand 15 states and 1370 transitions. [2023-08-03 21:59:58,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 262 transitions, 1815 flow [2023-08-03 21:59:58,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 262 transitions, 1717 flow, removed 18 selfloop flow, removed 23 redundant places. [2023-08-03 21:59:58,116 INFO L231 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2023-08-03 21:59:58,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2023-08-03 21:59:58,116 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-08-03 21:59:58,116 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2023-08-03 21:59:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.85714285714286) internal successors, (1216), 14 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:58,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:59:58,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:59:58,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 21:59:58,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 21:59:58,117 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:58,118 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 21:59:58,119 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:59:58,120 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:59:58,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:59:58 BasicIcfg [2023-08-03 21:59:58,123 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:59:58,124 INFO L158 Benchmark]: Toolchain (without parser) took 36077.20ms. Allocated memory was 339.7MB in the beginning and 3.7GB in the end (delta: 3.3GB). Free memory was 285.5MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. [2023-08-03 21:59:58,124 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 339.7MB. Free memory is still 287.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:59:58,124 INFO L158 Benchmark]: CACSL2BoogieTranslator took 565.75ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 257.0MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-03 21:59:58,124 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.76ms. Allocated memory is still 339.7MB. Free memory was 257.0MB in the beginning and 254.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 21:59:58,124 INFO L158 Benchmark]: Boogie Preprocessor took 34.78ms. Allocated memory is still 339.7MB. Free memory was 254.6MB in the beginning and 253.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:59:58,125 INFO L158 Benchmark]: RCFGBuilder took 385.82ms. Allocated memory was 339.7MB in the beginning and 522.2MB in the end (delta: 182.5MB). Free memory was 252.9MB in the beginning and 488.3MB in the end (delta: -235.4MB). Peak memory consumption was 27.7MB. Max. memory is 16.0GB. [2023-08-03 21:59:58,125 INFO L158 Benchmark]: TraceAbstraction took 35014.16ms. Allocated memory was 522.2MB in the beginning and 3.7GB in the end (delta: 3.2GB). Free memory was 488.3MB in the beginning and 2.1GB in the end (delta: -1.6GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-03 21:59:58,126 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 339.7MB. Free memory is still 287.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 565.75ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 257.0MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.76ms. Allocated memory is still 339.7MB. Free memory was 257.0MB in the beginning and 254.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.78ms. Allocated memory is still 339.7MB. Free memory was 254.6MB in the beginning and 253.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 385.82ms. Allocated memory was 339.7MB in the beginning and 522.2MB in the end (delta: 182.5MB). Free memory was 252.9MB in the beginning and 488.3MB in the end (delta: -235.4MB). Peak memory consumption was 27.7MB. Max. memory is 16.0GB. * TraceAbstraction took 35014.16ms. Allocated memory was 522.2MB in the beginning and 3.7GB in the end (delta: 3.2GB). Free memory was 488.3MB in the beginning and 2.1GB in the end (delta: -1.6GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 77 PlacesBefore, 12 PlacesAfterwards, 80 TransitionsBefore, 10 TransitionsAfterwards, 1054 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 5 ChoiceCompositions, 85 TotalNumberOfCompositions, 863 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 814, independent: 803, independent conditional: 0, independent unconditional: 803, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 561, independent: 557, independent conditional: 0, independent unconditional: 557, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 814, independent: 246, independent conditional: 0, independent unconditional: 246, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 561, unknown conditional: 0, unknown unconditional: 561] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 107 PlacesBefore, 29 PlacesAfterwards, 112 TransitionsBefore, 28 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 13 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, 6987 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4682, independent: 4497, independent conditional: 0, independent unconditional: 4497, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2149, independent: 2118, independent conditional: 0, independent unconditional: 2118, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4682, independent: 2379, independent conditional: 0, independent unconditional: 2379, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 2149, unknown conditional: 0, unknown unconditional: 2149] , Statistics on independence cache: Total cache size (in pairs): 135, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 107 PlacesBefore, 29 PlacesAfterwards, 112 TransitionsBefore, 28 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 14 ConcurrentYvCompositions, 6 ChoiceCompositions, 107 TotalNumberOfCompositions, 7106 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5293, independent: 5107, independent conditional: 0, independent unconditional: 5107, dependent: 186, dependent conditional: 0, dependent unconditional: 186, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2204, independent: 2171, independent conditional: 0, independent unconditional: 2171, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5293, independent: 2936, independent conditional: 0, independent unconditional: 2936, dependent: 153, dependent conditional: 0, dependent unconditional: 153, unknown: 2204, unknown conditional: 0, unknown unconditional: 2204] , Statistics on independence cache: Total cache size (in pairs): 158, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 998]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 103 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 131 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.2s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91 IncrementalHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 91 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 105 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 131 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.4s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4052 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3673 mSDsluCounter, 2029 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1876 mSDsCounter, 214 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11627 IncrementalHoareTripleChecker+Invalid, 11841 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 214 mSolverCounterUnsat, 153 mSDtfsCounter, 11627 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 413 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2403occurred in iteration=7, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 397 NumberOfCodeBlocks, 389 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 3000 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 28 InterpolantComputations, 10 PerfectInterpolantSequences, 200/290 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 21:59:58,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...