/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-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:53:24,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:53:24,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:53:24,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:53:24,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:53:24,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:53:24,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:53:24,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:53:24,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:53:24,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:53:24,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:53:24,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:53:24,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:53:24,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:53:24,236 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:53:24,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:53:24,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:53:24,240 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:53:24,240 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:53:24,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:53:24,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:53:24,245 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:53:24,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:53:24,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:53:24,245 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:53:24,247 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:53:24,247 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:53:24,247 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:53:24,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:53:24,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:53:24,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:53:24,249 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:53:24,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:53:24,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:53:24,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:53:24,250 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:53:24,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:53:24,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:53:24,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:53:24,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:53:24,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:53:24,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:53:24,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-2_bound2.i [2023-08-04 07:53:25,694 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:53:25,920 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:53:25,921 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack-2_bound2.i [2023-08-04 07:53:25,948 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e366ef1f1/9d0ceb899c4146dbbd70023232bb7a66/FLAG22af14fcd [2023-08-04 07:53:25,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e366ef1f1/9d0ceb899c4146dbbd70023232bb7a66 [2023-08-04 07:53:25,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:53:25,963 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:53:25,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:53:25,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:53:25,967 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:53:25,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:53:25" (1/1) ... [2023-08-04 07:53:25,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2483aaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:25, skipping insertion in model container [2023-08-04 07:53:25,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:53:25" (1/1) ... [2023-08-04 07:53:26,012 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:53:26,346 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-2_bound2.i[41520,41533] [2023-08-04 07:53:26,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:53:26,389 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:53:26,416 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 07:53:26,423 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 07:53:26,429 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 07:53:26,433 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-2_bound2.i[41520,41533] [2023-08-04 07:53:26,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:53:26,512 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:53:26,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26 WrapperNode [2023-08-04 07:53:26,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:53:26,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:53:26,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:53:26,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:53:26,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,544 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,570 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 192 [2023-08-04 07:53:26,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:53:26,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:53:26,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:53:26,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:53:26,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,595 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:53:26,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:53:26,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:53:26,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:53:26,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (1/1) ... [2023-08-04 07:53:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:53:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:26,633 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 07:53:26,642 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 07:53:26,666 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:53:26,666 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:53:26,666 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:53:26,667 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:53:26,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:53:26,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:53:26,669 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 07:53:26,776 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:53:26,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:53:27,014 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:53:27,022 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:53:27,022 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:53:27,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:53:27 BoogieIcfgContainer [2023-08-04 07:53:27,024 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:53:27,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:53:27,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:53:27,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:53:27,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:53:25" (1/3) ... [2023-08-04 07:53:27,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6bbf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:53:27, skipping insertion in model container [2023-08-04 07:53:27,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:53:26" (2/3) ... [2023-08-04 07:53:27,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6bbf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:53:27, skipping insertion in model container [2023-08-04 07:53:27,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:53:27" (3/3) ... [2023-08-04 07:53:27,030 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack-2_bound2.i [2023-08-04 07:53:27,036 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:53:27,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:53:27,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:53:27,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:53:27,146 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:53:27,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,267 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 07:53:27,267 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 07:53:27,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,288 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:27,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:27,352 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 07:53:27,352 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 07:53:27,367 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-04 07:53:31,561 INFO L134 LiptonReduction]: Checked pairs total: 22324 [2023-08-04 07:53:31,562 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-04 07:53:31,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:53:31,578 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;@de9c033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:31,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:53:31,584 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:31,584 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2023-08-04 07:53:31,585 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:53:31,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:31,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:31,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:31,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -263757633, now seen corresponding path program 1 times [2023-08-04 07:53:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:31,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642895203] [2023-08-04 07:53:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:31,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:31,943 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 07:53:31,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642895203] [2023-08-04 07:53:31,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642895203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:31,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:31,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:31,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887044840] [2023-08-04 07:53:31,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:31,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:32,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 362 [2023-08-04 07:53:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:32,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 362 [2023-08-04 07:53:32,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:32,552 INFO L124 PetriNetUnfolderBase]: 4212/6563 cut-off events. [2023-08-04 07:53:32,552 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-08-04 07:53:32,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13098 conditions, 6563 events. 4212/6563 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 35035 event pairs, 1281 based on Foata normal form. 0/4541 useless extension candidates. Maximal degree in co-relation 11958. Up to 3623 conditions per place. [2023-08-04 07:53:32,595 INFO L140 encePairwiseOnDemand]: 357/362 looper letters, 79 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-04 07:53:32,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 88 transitions, 379 flow [2023-08-04 07:53:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-04 07:53:32,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497237569060773 [2023-08-04 07:53:32,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-04 07:53:32,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-04 07:53:32,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:32,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-04 07:53:32,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,628 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 120 flow. Second operand 3 states and 597 transitions. [2023-08-04 07:53:32,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 88 transitions, 379 flow [2023-08-04 07:53:32,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 88 transitions, 379 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:53:32,637 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 150 flow [2023-08-04 07:53:32,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2023-08-04 07:53:32,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-04 07:53:32,641 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 150 flow [2023-08-04 07:53:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:32,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:32,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:53:32,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:32,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -56478494, now seen corresponding path program 1 times [2023-08-04 07:53:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:32,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773620461] [2023-08-04 07:53:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:32,699 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 07:53:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773620461] [2023-08-04 07:53:32,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773620461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:32,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:32,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081821337] [2023-08-04 07:53:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:32,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 362 [2023-08-04 07:53:32,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:32,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:32,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 362 [2023-08-04 07:53:32,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:33,217 INFO L124 PetriNetUnfolderBase]: 4135/6367 cut-off events. [2023-08-04 07:53:33,218 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-04 07:53:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13724 conditions, 6367 events. 4135/6367 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 34542 event pairs, 1588 based on Foata normal form. 0/4683 useless extension candidates. Maximal degree in co-relation 12802. Up to 6234 conditions per place. [2023-08-04 07:53:33,254 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 58 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 07:53:33,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 304 flow [2023-08-04 07:53:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-04 07:53:33,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-08-04 07:53:33,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-04 07:53:33,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-04 07:53:33,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:33,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-04 07:53:33,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,264 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 150 flow. Second operand 3 states and 570 transitions. [2023-08-04 07:53:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 304 flow [2023-08-04 07:53:33,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:53:33,271 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 150 flow [2023-08-04 07:53:33,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-08-04 07:53:33,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-04 07:53:33,272 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 150 flow [2023-08-04 07:53:33,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:33,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:33,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 07:53:33,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:33,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1925758060, now seen corresponding path program 1 times [2023-08-04 07:53:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:33,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994746949] [2023-08-04 07:53:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:33,323 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 07:53:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:33,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994746949] [2023-08-04 07:53:33,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994746949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:33,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:33,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312469540] [2023-08-04 07:53:33,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 362 [2023-08-04 07:53:33,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:33,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 362 [2023-08-04 07:53:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:33,804 INFO L124 PetriNetUnfolderBase]: 4504/6990 cut-off events. [2023-08-04 07:53:33,804 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2023-08-04 07:53:33,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14692 conditions, 6990 events. 4504/6990 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 38465 event pairs, 3096 based on Foata normal form. 0/5193 useless extension candidates. Maximal degree in co-relation 14566. Up to 6241 conditions per place. [2023-08-04 07:53:33,848 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 76 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-04 07:53:33,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 394 flow [2023-08-04 07:53:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-04 07:53:33,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-08-04 07:53:33,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-04 07:53:33,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-04 07:53:33,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:33,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-04 07:53:33,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,856 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 150 flow. Second operand 3 states and 588 transitions. [2023-08-04 07:53:33,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 394 flow [2023-08-04 07:53:33,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 84 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:53:33,861 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 161 flow [2023-08-04 07:53:33,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-08-04 07:53:33,862 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2023-08-04 07:53:33,862 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 161 flow [2023-08-04 07:53:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:33,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:33,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:53:33,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:33,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash 683287674, now seen corresponding path program 1 times [2023-08-04 07:53:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767170938] [2023-08-04 07:53:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:33,942 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 07:53:33,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767170938] [2023-08-04 07:53:33,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767170938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834204240] [2023-08-04 07:53:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:34,125 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 07:53:34,128 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 07:53:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:34,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:53:34,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:34,285 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 07:53:34,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:34,303 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 07:53:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834204240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:34,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:53:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548216463] [2023-08-04 07:53:34,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:34,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:53:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:53:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:53:34,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 362 [2023-08-04 07:53:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:34,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 362 [2023-08-04 07:53:34,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:34,356 INFO L124 PetriNetUnfolderBase]: 38/107 cut-off events. [2023-08-04 07:53:34,356 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-04 07:53:34,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 107 events. 38/107 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 321 event pairs, 3 based on Foata normal form. 17/115 useless extension candidates. Maximal degree in co-relation 259. Up to 70 conditions per place. [2023-08-04 07:53:34,357 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 27 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2023-08-04 07:53:34,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 175 flow [2023-08-04 07:53:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:53:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:53:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2023-08-04 07:53:34,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889502762430939 [2023-08-04 07:53:34,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2023-08-04 07:53:34,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2023-08-04 07:53:34,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:34,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2023-08-04 07:53:34,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,365 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 161 flow. Second operand 4 states and 708 transitions. [2023-08-04 07:53:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 175 flow [2023-08-04 07:53:34,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:53:34,366 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 63 flow [2023-08-04 07:53:34,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2023-08-04 07:53:34,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -19 predicate places. [2023-08-04 07:53:34,368 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 63 flow [2023-08-04 07:53:34,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:34,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:34,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:53:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:34,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:34,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 820981199, now seen corresponding path program 1 times [2023-08-04 07:53:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464602460] [2023-08-04 07:53:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:34,665 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 07:53:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464602460] [2023-08-04 07:53:34,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464602460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691192258] [2023-08-04 07:53:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:34,667 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 07:53:34,670 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 07:53:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:34,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 07:53:34,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:34,788 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 07:53:34,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:34,822 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 07:53:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691192258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:34,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:34,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 07:53:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231784148] [2023-08-04 07:53:34,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 07:53:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 07:53:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 07:53:34,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2023-08-04 07:53:34,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 63 flow. Second operand has 10 states, 10 states have (on average 171.9) internal successors, (1719), 10 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:34,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2023-08-04 07:53:34,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:34,980 INFO L124 PetriNetUnfolderBase]: 70/173 cut-off events. [2023-08-04 07:53:34,980 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-04 07:53:34,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 173 events. 70/173 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 301 event pairs, 10 based on Foata normal form. 6/176 useless extension candidates. Maximal degree in co-relation 425. Up to 57 conditions per place. [2023-08-04 07:53:34,981 INFO L140 encePairwiseOnDemand]: 358/362 looper letters, 42 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-04 07:53:34,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 243 flow [2023-08-04 07:53:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 07:53:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 07:53:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1225 transitions. [2023-08-04 07:53:34,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342541436464087 [2023-08-04 07:53:34,984 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1225 transitions. [2023-08-04 07:53:34,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1225 transitions. [2023-08-04 07:53:34,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:34,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1225 transitions. [2023-08-04 07:53:34,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,993 INFO L175 Difference]: Start difference. First operand has 26 places, 18 transitions, 63 flow. Second operand 7 states and 1225 transitions. [2023-08-04 07:53:34,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 243 flow [2023-08-04 07:53:34,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:53:34,995 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 104 flow [2023-08-04 07:53:34,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=104, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:53:34,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -13 predicate places. [2023-08-04 07:53:34,996 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 104 flow [2023-08-04 07:53:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.9) internal successors, (1719), 10 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:34,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:34,997 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:35,003 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 07:53:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:35,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:35,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 265066479, now seen corresponding path program 2 times [2023-08-04 07:53:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909032065] [2023-08-04 07:53:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:35,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909032065] [2023-08-04 07:53:35,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909032065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934438352] [2023-08-04 07:53:35,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:53:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:35,371 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 07:53:35,374 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 07:53:35,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:53:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:53:35,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:53:35,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:35,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:53:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:35,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934438352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:53:35,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:53:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-08-04 07:53:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693648375] [2023-08-04 07:53:35,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:53:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 07:53:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 07:53:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-04 07:53:35,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 362 [2023-08-04 07:53:35,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 104 flow. Second operand has 13 states, 13 states have (on average 172.15384615384616) internal successors, (2238), 13 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 362 [2023-08-04 07:53:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:35,818 INFO L124 PetriNetUnfolderBase]: 102/253 cut-off events. [2023-08-04 07:53:35,818 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 07:53:35,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 253 events. 102/253 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 429 event pairs, 10 based on Foata normal form. 6/256 useless extension candidates. Maximal degree in co-relation 682. Up to 57 conditions per place. [2023-08-04 07:53:35,819 INFO L140 encePairwiseOnDemand]: 358/362 looper letters, 62 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2023-08-04 07:53:35,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 391 flow [2023-08-04 07:53:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 07:53:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 07:53:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1921 transitions. [2023-08-04 07:53:35,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48242089402310395 [2023-08-04 07:53:35,824 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1921 transitions. [2023-08-04 07:53:35,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1921 transitions. [2023-08-04 07:53:35,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:35,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1921 transitions. [2023-08-04 07:53:35,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.63636363636363) internal successors, (1921), 11 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:35,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 362.0) internal successors, (4344), 12 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:35,834 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 362.0) internal successors, (4344), 12 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:35,834 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 104 flow. Second operand 11 states and 1921 transitions. [2023-08-04 07:53:35,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 391 flow [2023-08-04 07:53:35,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 385 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 07:53:35,837 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 162 flow [2023-08-04 07:53:35,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-04 07:53:35,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-04 07:53:35,838 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 162 flow [2023-08-04 07:53:35,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 172.15384615384616) internal successors, (2238), 13 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:35,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:35,839 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:35,851 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 07:53:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:36,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:36,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -3030513, now seen corresponding path program 3 times [2023-08-04 07:53:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483677177] [2023-08-04 07:53:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 62 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:36,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483677177] [2023-08-04 07:53:36,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483677177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22259847] [2023-08-04 07:53:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:53:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:36,235 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 07:53:36,238 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 07:53:36,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 07:53:36,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:53:36,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 07:53:36,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:36,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:53:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22259847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:36,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:53:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-04 07:53:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525582556] [2023-08-04 07:53:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:36,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 07:53:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 07:53:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-04 07:53:36,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 362 [2023-08-04 07:53:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 362 [2023-08-04 07:53:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:53:36,594 INFO L124 PetriNetUnfolderBase]: 72/201 cut-off events. [2023-08-04 07:53:36,595 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-08-04 07:53:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 201 events. 72/201 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 324 event pairs, 0 based on Foata normal form. 3/204 useless extension candidates. Maximal degree in co-relation 557. Up to 38 conditions per place. [2023-08-04 07:53:36,595 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-04 07:53:36,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 322 flow [2023-08-04 07:53:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:53:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:53:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1413 transitions. [2023-08-04 07:53:36,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487914364640884 [2023-08-04 07:53:36,599 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1413 transitions. [2023-08-04 07:53:36,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1413 transitions. [2023-08-04 07:53:36,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:36,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1413 transitions. [2023-08-04 07:53:36,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.625) internal successors, (1413), 8 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:36,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 362.0) internal successors, (3258), 9 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:36,607 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 362.0) internal successors, (3258), 9 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:36,607 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 162 flow. Second operand 8 states and 1413 transitions. [2023-08-04 07:53:36,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 322 flow [2023-08-04 07:53:36,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 266 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-08-04 07:53:36,609 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-04 07:53:36,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-04 07:53:36,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -7 predicate places. [2023-08-04 07:53:36,610 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-04 07:53:36,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:36,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 07:53:36,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 07:53:36,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 07:53:36,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 07:53:36,620 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 07:53:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:36,820 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-08-04 07:53:36,822 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 07:53:36,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,851 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 07:53:36,852 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:36,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 07:53:36,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:36,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 192 transitions, 406 flow [2023-08-04 07:53:36,880 INFO L124 PetriNetUnfolderBase]: 37/347 cut-off events. [2023-08-04 07:53:36,880 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:53:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 347 events. 37/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1484 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 07:53:36,890 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-04 07:53:40,214 INFO L134 LiptonReduction]: Checked pairs total: 21119 [2023-08-04 07:53:40,214 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-04 07:53:40,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:53:40,216 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;@de9c033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:40,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:53:40,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:40,219 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 07:53:40,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:53:40,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:40,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:53:40,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:53:40,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2044729076, now seen corresponding path program 1 times [2023-08-04 07:53:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105275699] [2023-08-04 07:53:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:53:40,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:53:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:53:40,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:53:40,267 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:53:40,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:53:40,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:53:40,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 07:53:40,268 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:53:40,269 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:53:40,269 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:53:40,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:53:40,308 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:53:40,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,431 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 07:53:40,431 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:53:40,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 07:53:40,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:53:40,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 305 transitions, 658 flow [2023-08-04 07:53:40,579 INFO L124 PetriNetUnfolderBase]: 141/1027 cut-off events. [2023-08-04 07:53:40,579 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:53:40,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1027 events. 141/1027 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6407 event pairs, 1 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-04 07:53:40,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 07:53:44,957 INFO L134 LiptonReduction]: Checked pairs total: 89349 [2023-08-04 07:53:44,958 INFO L136 LiptonReduction]: Total number of compositions: 273 [2023-08-04 07:53:44,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:53:44,959 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;@de9c033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:53:44,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 07:53:44,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:53:44,962 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 07:53:44,963 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:53:44,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:44,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:44,963 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 07:53:44,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash -512961349, now seen corresponding path program 1 times [2023-08-04 07:53:44,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890282714] [2023-08-04 07:53:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:45,017 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 07:53:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890282714] [2023-08-04 07:53:45,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890282714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:45,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:53:45,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:53:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833484650] [2023-08-04 07:53:45,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:53:45,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 578 [2023-08-04 07:53:45,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:53:45,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:45,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 578 [2023-08-04 07:53:45,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:55:25,566 INFO L124 PetriNetUnfolderBase]: 1402380/1779240 cut-off events. [2023-08-04 07:55:25,567 INFO L125 PetriNetUnfolderBase]: For 80275/80275 co-relation queries the response was YES. [2023-08-04 07:55:29,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569167 conditions, 1779240 events. 1402380/1779240 cut-off events. For 80275/80275 co-relation queries the response was YES. Maximal size of possible extension queue 32138. Compared 11968625 event pairs, 461273 based on Foata normal form. 0/1290460 useless extension candidates. Maximal degree in co-relation 2163005. Up to 957981 conditions per place. [2023-08-04 07:55:40,371 INFO L140 encePairwiseOnDemand]: 568/578 looper letters, 140 selfloop transitions, 7 changer transitions 0/154 dead transitions. [2023-08-04 07:55:40,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 154 transitions, 687 flow [2023-08-04 07:55:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:55:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:55:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-08-04 07:55:40,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501730103806228 [2023-08-04 07:55:40,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-08-04 07:55:40,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-08-04 07:55:40,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:55:40,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-08-04 07:55:40,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:55:40,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:55:40,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:55:40,394 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 3 states and 954 transitions. [2023-08-04 07:55:40,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 154 transitions, 687 flow [2023-08-04 07:55:40,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 154 transitions, 687 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:55:40,485 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 272 flow [2023-08-04 07:55:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 07:55:40,487 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-04 07:55:40,488 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 272 flow [2023-08-04 07:55:40,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:55:40,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:55:40,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:55:40,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 07:55:40,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:55:40,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:55:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1108738403, now seen corresponding path program 1 times [2023-08-04 07:55:40,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:55:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818155113] [2023-08-04 07:55:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:55:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:55:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:55:40,547 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 07:55:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:55:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818155113] [2023-08-04 07:55:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818155113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:55:40,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:55:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:55:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797678383] [2023-08-04 07:55:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:55:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:55:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:55:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:55:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:55:40,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 578 [2023-08-04 07:55:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:55:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:55:40,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 578 [2023-08-04 07:55:40,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand