/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:53:13,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:53:13,393 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:53:13,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:53:13,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:53:13,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:53:13,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:53:13,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:53:13,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:53:13,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:53:13,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:53:13,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:53:13,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:53:13,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:53:13,417 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:53:13,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:53:13,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:53:13,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:53:13,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:53:13,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:53:13,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:53:13,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:53:13,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:53:13,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:53:13,420 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:53:13,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:53:13,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:53:13,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:53:13,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:53:13,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:53:13,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:53:13,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:53:13,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:53:13,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:53:13,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:53:13,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:53:13,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:53:13,423 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:53:13,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:53:13,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:53:13,424 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:53:13,424 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:53:13,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:53:13,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:53:13,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:53:13,642 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:53:13,642 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:53:13,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-04 07:53:14,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:53:15,150 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:53:15,151 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i [2023-08-04 07:53:15,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05e81307/9d7a7df0338946c8a9efc8ab1e1d9a7c/FLAGcad38f8fe [2023-08-04 07:53:15,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05e81307/9d7a7df0338946c8a9efc8ab1e1d9a7c [2023-08-04 07:53:15,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:53:15,190 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:53:15,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:53:15,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:53:15,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:53:15,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16bdc442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15, skipping insertion in model container [2023-08-04 07:53:15,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,237 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:53:15,574 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i[41520,41533] [2023-08-04 07:53:15,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:53:15,601 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:53:15,615 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 07:53:15,617 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 07:53:15,624 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 07:53:15,628 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-1_bound2.i[41520,41533] [2023-08-04 07:53:15,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:53:15,685 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:53:15,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15 WrapperNode [2023-08-04 07:53:15,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:53:15,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:53:15,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:53:15,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:53:15,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,738 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 185 [2023-08-04 07:53:15,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:53:15,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:53:15,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:53:15,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:53:15,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:53:15,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:53:15,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:53:15,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:53:15,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (1/1) ... [2023-08-04 07:53:15,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:53:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:15,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:53:15,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:53:15,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:53:15,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:53:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:53:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:53:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:53:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:53:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:53:15,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:53:15,843 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:53:15,954 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:53:15,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:53:16,164 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:53:16,172 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:53:16,173 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:53:16,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:53:16 BoogieIcfgContainer [2023-08-04 07:53:16,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:53:16,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:53:16,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:53:16,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:53:16,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:53:15" (1/3) ... [2023-08-04 07:53:16,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bb4942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:53:16, skipping insertion in model container [2023-08-04 07:53:16,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:15" (2/3) ... [2023-08-04 07:53:16,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bb4942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:53:16, skipping insertion in model container [2023-08-04 07:53:16,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:53:16" (3/3) ... [2023-08-04 07:53:16,181 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack-1_bound2.i [2023-08-04 07:53:16,188 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:53:16,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:53:16,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:53:16,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:53:16,268 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:53:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,388 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 07:53:16,389 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:16,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 07:53:16,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:16,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,419 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:16,481 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 07:53:16,481 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 07:53:16,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-04 07:53:19,796 INFO L134 LiptonReduction]: Checked pairs total: 20837 [2023-08-04 07:53:19,797 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-04 07:53:19,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:53:19,809 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;@66255a6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:19,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:53:19,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:19,813 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2023-08-04 07:53:19,813 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:53:19,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:19,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:19,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:19,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1579589005, now seen corresponding path program 1 times [2023-08-04 07:53:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:19,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939142482] [2023-08-04 07:53:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:19,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:19,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939142482] [2023-08-04 07:53:19,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939142482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:19,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:19,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:19,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622807664] [2023-08-04 07:53:19,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:20,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 351 [2023-08-04 07:53:20,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 351 [2023-08-04 07:53:20,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:20,340 INFO L124 PetriNetUnfolderBase]: 3155/4982 cut-off events. [2023-08-04 07:53:20,340 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 07:53:20,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9962 conditions, 4982 events. 3155/4982 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24638 event pairs, 1280 based on Foata normal form. 0/3460 useless extension candidates. Maximal degree in co-relation 9190. Up to 2934 conditions per place. [2023-08-04 07:53:20,360 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 73 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 07:53:20,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 81 transitions, 351 flow [2023-08-04 07:53:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 07:53:20,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327635327635327 [2023-08-04 07:53:20,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 07:53:20,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 07:53:20,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:20,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 07:53:20,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,383 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 118 flow. Second operand 3 states and 561 transitions. [2023-08-04 07:53:20,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 81 transitions, 351 flow [2023-08-04 07:53:20,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 81 transitions, 351 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:53:20,388 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 135 flow [2023-08-04 07:53:20,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-08-04 07:53:20,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 07:53:20,392 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 135 flow [2023-08-04 07:53:20,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:20,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:53:20,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:20,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1355370778, now seen corresponding path program 1 times [2023-08-04 07:53:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831213056] [2023-08-04 07:53:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831213056] [2023-08-04 07:53:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831213056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:20,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:20,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255141445] [2023-08-04 07:53:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:20,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 351 [2023-08-04 07:53:20,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:20,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 351 [2023-08-04 07:53:20,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:20,852 INFO L124 PetriNetUnfolderBase]: 3448/5381 cut-off events. [2023-08-04 07:53:20,852 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-08-04 07:53:20,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11328 conditions, 5381 events. 3448/5381 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 28034 event pairs, 1971 based on Foata normal form. 0/4028 useless extension candidates. Maximal degree in co-relation 10533. Up to 4840 conditions per place. [2023-08-04 07:53:20,870 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 70 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 07:53:20,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 353 flow [2023-08-04 07:53:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-04 07:53:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365622032288699 [2023-08-04 07:53:20,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-04 07:53:20,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-04 07:53:20,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:20,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-04 07:53:20,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,876 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 135 flow. Second operand 3 states and 565 transitions. [2023-08-04 07:53:20,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 353 flow [2023-08-04 07:53:20,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:53:20,880 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 147 flow [2023-08-04 07:53:20,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-04 07:53:20,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-04 07:53:20,880 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 147 flow [2023-08-04 07:53:20,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:20,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:20,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:20,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 07:53:20,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:20,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash 865354790, now seen corresponding path program 1 times [2023-08-04 07:53:20,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:20,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60743167] [2023-08-04 07:53:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:20,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60743167] [2023-08-04 07:53:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60743167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326616581] [2023-08-04 07:53:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:20,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:20,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:20,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:53:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:21,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 07:53:21,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:21,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326616581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:21,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 07:53:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765731508] [2023-08-04 07:53:21,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:21,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 07:53:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 07:53:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 07:53:21,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 351 [2023-08-04 07:53:21,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 147 flow. Second operand has 10 states, 10 states have (on average 160.7) internal successors, (1607), 10 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:21,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:21,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 351 [2023-08-04 07:53:21,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:22,083 INFO L124 PetriNetUnfolderBase]: 7728/12191 cut-off events. [2023-08-04 07:53:22,083 INFO L125 PetriNetUnfolderBase]: For 3801/3801 co-relation queries the response was YES. [2023-08-04 07:53:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27415 conditions, 12191 events. 7728/12191 cut-off events. For 3801/3801 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 70411 event pairs, 1145 based on Foata normal form. 326/9632 useless extension candidates. Maximal degree in co-relation 25658. Up to 3394 conditions per place. [2023-08-04 07:53:22,126 INFO L140 encePairwiseOnDemand]: 343/351 looper letters, 272 selfloop transitions, 26 changer transitions 3/306 dead transitions. [2023-08-04 07:53:22,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 306 transitions, 1436 flow [2023-08-04 07:53:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 07:53:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 07:53:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2188 transitions. [2023-08-04 07:53:22,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194681861348528 [2023-08-04 07:53:22,131 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2188 transitions. [2023-08-04 07:53:22,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2188 transitions. [2023-08-04 07:53:22,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:22,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2188 transitions. [2023-08-04 07:53:22,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.33333333333334) internal successors, (2188), 12 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:22,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 351.0) internal successors, (4563), 13 states have internal predecessors, (4563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:22,141 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 351.0) internal successors, (4563), 13 states have internal predecessors, (4563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:22,141 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 147 flow. Second operand 12 states and 2188 transitions. [2023-08-04 07:53:22,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 306 transitions, 1436 flow [2023-08-04 07:53:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 306 transitions, 1421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:53:22,155 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 359 flow [2023-08-04 07:53:22,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=359, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 07:53:22,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2023-08-04 07:53:22,156 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 359 flow [2023-08-04 07:53:22,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.7) internal successors, (1607), 10 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:22,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:22,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:22,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:53:22,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:22,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:22,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1101719705, now seen corresponding path program 1 times [2023-08-04 07:53:22,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:22,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916225091] [2023-08-04 07:53:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916225091] [2023-08-04 07:53:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916225091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102939890] [2023-08-04 07:53:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:22,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:22,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:53:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:22,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:53:22,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:53:22,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:53:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102939890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:53:22,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:53:22,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076008524] [2023-08-04 07:53:22,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:53:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 351 [2023-08-04 07:53:22,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:22,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:22,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 351 [2023-08-04 07:53:22,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:23,376 INFO L124 PetriNetUnfolderBase]: 9295/14738 cut-off events. [2023-08-04 07:53:23,376 INFO L125 PetriNetUnfolderBase]: For 12546/12546 co-relation queries the response was YES. [2023-08-04 07:53:23,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37981 conditions, 14738 events. 9295/14738 cut-off events. For 12546/12546 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 88533 event pairs, 4763 based on Foata normal form. 316/11606 useless extension candidates. Maximal degree in co-relation 35468. Up to 10743 conditions per place. [2023-08-04 07:53:23,597 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 100 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-04 07:53:23,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 116 transitions, 722 flow [2023-08-04 07:53:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-08-04 07:53:23,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375118708452041 [2023-08-04 07:53:23,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-08-04 07:53:23,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-08-04 07:53:23,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:23,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-08-04 07:53:23,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:23,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:23,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:23,607 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 359 flow. Second operand 3 states and 566 transitions. [2023-08-04 07:53:23,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 116 transitions, 722 flow [2023-08-04 07:53:23,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 711 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 07:53:23,736 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 452 flow [2023-08-04 07:53:23,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-08-04 07:53:23,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2023-08-04 07:53:23,737 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 452 flow [2023-08-04 07:53:23,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:23,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:23,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:23,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:53:23,950 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,SelfDestructingSolverStorable3 [2023-08-04 07:53:23,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:23,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -554325797, now seen corresponding path program 1 times [2023-08-04 07:53:23,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:23,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414664387] [2023-08-04 07:53:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:23,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414664387] [2023-08-04 07:53:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414664387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928388165] [2023-08-04 07:53:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:24,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:24,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:24,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:53:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:24,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:53:24,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928388165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:24,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:24,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:53:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406162364] [2023-08-04 07:53:24,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:24,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:53:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:24,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:53:24,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:53:24,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-04 07:53:24,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:24,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:24,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-04 07:53:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:24,227 INFO L124 PetriNetUnfolderBase]: 89/255 cut-off events. [2023-08-04 07:53:24,227 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-08-04 07:53:24,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 255 events. 89/255 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 844 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 646. Up to 168 conditions per place. [2023-08-04 07:53:24,228 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 41 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-08-04 07:53:24,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 355 flow [2023-08-04 07:53:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:53:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:53:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2023-08-04 07:53:24,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2023-08-04 07:53:24,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2023-08-04 07:53:24,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2023-08-04 07:53:24,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:24,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2023-08-04 07:53:24,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:24,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:24,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:24,234 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 452 flow. Second operand 4 states and 681 transitions. [2023-08-04 07:53:24,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 355 flow [2023-08-04 07:53:24,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 300 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-04 07:53:24,236 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 115 flow [2023-08-04 07:53:24,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-08-04 07:53:24,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-04 07:53:24,238 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 115 flow [2023-08-04 07:53:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:24,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:24,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:24,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:53:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:24,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:24,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1072256582, now seen corresponding path program 2 times [2023-08-04 07:53:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:24,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796424407] [2023-08-04 07:53:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796424407] [2023-08-04 07:53:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796424407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206142910] [2023-08-04 07:53:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:53:24,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:24,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:24,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:53:24,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:53:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:53:24,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:53:24,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:24,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206142910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:24,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-08-04 07:53:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591430621] [2023-08-04 07:53:24,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:53:24,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:24,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:53:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:53:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 351 [2023-08-04 07:53:25,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 115 flow. Second operand has 15 states, 15 states have (on average 157.6) internal successors, (2364), 15 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:25,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:25,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 351 [2023-08-04 07:53:25,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:25,354 INFO L124 PetriNetUnfolderBase]: 107/260 cut-off events. [2023-08-04 07:53:25,354 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-08-04 07:53:25,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 260 events. 107/260 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 475 event pairs, 6 based on Foata normal form. 6/263 useless extension candidates. Maximal degree in co-relation 703. Up to 85 conditions per place. [2023-08-04 07:53:25,355 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 62 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2023-08-04 07:53:25,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 421 flow [2023-08-04 07:53:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 07:53:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 07:53:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2230 transitions. [2023-08-04 07:53:25,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538054538054538 [2023-08-04 07:53:25,371 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2230 transitions. [2023-08-04 07:53:25,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2230 transitions. [2023-08-04 07:53:25,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:25,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2230 transitions. [2023-08-04 07:53:25,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 159.28571428571428) internal successors, (2230), 14 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:25,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:25,402 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:25,402 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 115 flow. Second operand 14 states and 2230 transitions. [2023-08-04 07:53:25,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 421 flow [2023-08-04 07:53:25,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:53:25,405 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 192 flow [2023-08-04 07:53:25,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=192, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-08-04 07:53:25,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-08-04 07:53:25,408 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 192 flow [2023-08-04 07:53:25,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.6) internal successors, (2364), 15 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:25,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:25,409 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:25,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:53:25,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:25,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:25,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:25,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1013198950, now seen corresponding path program 3 times [2023-08-04 07:53:25,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:25,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270905056] [2023-08-04 07:53:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:25,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:25,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270905056] [2023-08-04 07:53:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270905056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018160424] [2023-08-04 07:53:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:53:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:25,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:25,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:53:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 07:53:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:53:26,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 07:53:26,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:26,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:53:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018160424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:26,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:53:26,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-04 07:53:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760306018] [2023-08-04 07:53:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:26,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 07:53:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 07:53:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-04 07:53:26,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-04 07:53:26,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:26,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:26,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-04 07:53:26,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:26,344 INFO L124 PetriNetUnfolderBase]: 72/186 cut-off events. [2023-08-04 07:53:26,344 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-04 07:53:26,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 186 events. 72/186 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 293 event pairs, 0 based on Foata normal form. 3/189 useless extension candidates. Maximal degree in co-relation 566. Up to 38 conditions per place. [2023-08-04 07:53:26,345 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-04 07:53:26,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 328 flow [2023-08-04 07:53:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:53:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:53:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1357 transitions. [2023-08-04 07:53:26,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48326210826210825 [2023-08-04 07:53:26,350 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1357 transitions. [2023-08-04 07:53:26,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1357 transitions. [2023-08-04 07:53:26,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:26,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1357 transitions. [2023-08-04 07:53:26,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.625) internal successors, (1357), 8 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:26,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:26,376 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:26,376 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 192 flow. Second operand 8 states and 1357 transitions. [2023-08-04 07:53:26,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 328 flow [2023-08-04 07:53:26,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 274 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-08-04 07:53:26,378 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-08-04 07:53:26,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-08-04 07:53:26,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 07:53:26,379 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-08-04 07:53:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:26,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 07:53:26,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 07:53:26,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 07:53:26,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 07:53:26,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:53:26,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:26,586 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-08-04 07:53:26,588 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 07:53:26,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,611 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 07:53:26,611 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 07:53:26,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:26,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 392 flow [2023-08-04 07:53:26,633 INFO L124 PetriNetUnfolderBase]: 37/334 cut-off events. [2023-08-04 07:53:26,633 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:26,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 334 events. 37/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1453 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-04 07:53:26,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-04 07:53:29,806 INFO L134 LiptonReduction]: Checked pairs total: 21158 [2023-08-04 07:53:29,806 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-04 07:53:29,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:53:29,808 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;@66255a6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:29,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:53:29,810 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:29,810 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-04 07:53:29,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:53:29,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:29,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:53:29,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:53:29,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1365743532, now seen corresponding path program 1 times [2023-08-04 07:53:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204135607] [2023-08-04 07:53:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:53:29,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:53:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:53:29,861 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:53:29,861 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:53:29,862 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:53:29,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:53:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 07:53:29,862 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:53:29,862 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:53:29,863 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:53:29,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:53:29,904 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:53:29,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,013 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 07:53:30,013 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:53:30,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 989 events. 141/989 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6104 event pairs, 1 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 603. Up to 32 conditions per place. [2023-08-04 07:53:30,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,029 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:30,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 291 transitions, 630 flow [2023-08-04 07:53:30,136 INFO L124 PetriNetUnfolderBase]: 141/989 cut-off events. [2023-08-04 07:53:30,136 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:53:30,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 989 events. 141/989 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6104 event pairs, 1 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 603. Up to 32 conditions per place. [2023-08-04 07:53:30,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-04 07:53:34,491 INFO L134 LiptonReduction]: Checked pairs total: 91850 [2023-08-04 07:53:34,492 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 07:53:34,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:53:34,493 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;@66255a6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:34,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 07:53:34,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:34,496 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-04 07:53:34,496 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:53:34,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:34,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:34,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:53:34,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1098556959, now seen corresponding path program 1 times [2023-08-04 07:53:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238117884] [2023-08-04 07:53:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:34,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:34,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238117884] [2023-08-04 07:53:34,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238117884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:34,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:34,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255973576] [2023-08-04 07:53:34,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:34,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:34,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:34,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 557 [2023-08-04 07:53:34,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:34,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 557 [2023-08-04 07:53:34,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:54:49,753 INFO L124 PetriNetUnfolderBase]: 1064952/1351091 cut-off events. [2023-08-04 07:54:49,754 INFO L125 PetriNetUnfolderBase]: For 69142/69142 co-relation queries the response was YES. [2023-08-04 07:54:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720937 conditions, 1351091 events. 1064952/1351091 cut-off events. For 69142/69142 co-relation queries the response was YES. Maximal size of possible extension queue 24290. Compared 8864106 event pairs, 393661 based on Foata normal form. 0/981420 useless extension candidates. Maximal degree in co-relation 1864998. Up to 788517 conditions per place. [2023-08-04 07:54:57,506 INFO L140 encePairwiseOnDemand]: 544/557 looper letters, 133 selfloop transitions, 7 changer transitions 0/147 dead transitions. [2023-08-04 07:54:57,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 147 transitions, 659 flow [2023-08-04 07:54:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:54:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:54:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-08-04 07:54:57,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5326152004787552 [2023-08-04 07:54:57,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-08-04 07:54:57,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-08-04 07:54:57,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:54:57,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-08-04 07:54:57,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:54:57,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:54:57,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:54:57,522 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 3 states and 890 transitions. [2023-08-04 07:54:57,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 147 transitions, 659 flow [2023-08-04 07:54:57,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 147 transitions, 659 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:54:57,555 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 274 flow [2023-08-04 07:54:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2023-08-04 07:54:57,556 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-04 07:54:57,557 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 274 flow [2023-08-04 07:54:57,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:54:57,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:54:57,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:54:57,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 07:54:57,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:54:57,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:54:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1688040794, now seen corresponding path program 1 times [2023-08-04 07:54:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:54:57,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991573820] [2023-08-04 07:54:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:54:57,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:54:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:54:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:54:57,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:54:57,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991573820] [2023-08-04 07:54:57,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991573820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:54:57,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:54:57,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:54:57,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42229104] [2023-08-04 07:54:57,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:54:57,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:54:57,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:54:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:54:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:54:57,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 557 [2023-08-04 07:54:57,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:54:57,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:54:57,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 557 [2023-08-04 07:54:57,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:56:31,636 INFO L124 PetriNetUnfolderBase]: 1163724/1478571 cut-off events. [2023-08-04 07:56:31,636 INFO L125 PetriNetUnfolderBase]: For 312539/312539 co-relation queries the response was YES. [2023-08-04 07:56:35,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255790 conditions, 1478571 events. 1163724/1478571 cut-off events. For 312539/312539 co-relation queries the response was YES. Maximal size of possible extension queue 27096. Compared 10019929 event pairs, 676982 based on Foata normal form. 0/1162086 useless extension candidates. Maximal degree in co-relation 2358506. Up to 1338909 conditions per place. [2023-08-04 07:56:41,673 INFO L140 encePairwiseOnDemand]: 554/557 looper letters, 142 selfloop transitions, 3 changer transitions 0/152 dead transitions. [2023-08-04 07:56:41,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 152 transitions, 765 flow [2023-08-04 07:56:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:56:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:56:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-04 07:56:41,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421903052064632 [2023-08-04 07:56:41,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-04 07:56:41,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-04 07:56:41,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:56:41,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-04 07:56:41,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:56:41,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:56:41,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:56:41,709 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 274 flow. Second operand 3 states and 906 transitions. [2023-08-04 07:56:41,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 152 transitions, 765 flow