/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:56:35,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:56:35,140 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:56:35,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:56:35,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:56:35,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:56:35,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:56:35,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:56:35,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:56:35,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:56:35,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:56:35,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:56:35,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:56:35,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:56:35,179 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:56:35,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:56:35,179 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:56:35,180 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:56:35,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:56:35,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:56:35,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:56:35,181 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:56:35,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:56:35,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:56:35,182 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:56:35,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:56:35,182 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:56:35,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:56:35,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:56:35,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:56:35,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:56:35,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:56:35,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:56:35,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:56:35,185 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:56:35,186 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:56:35,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:56:35,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:56:35,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:56:35,439 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:56:35,440 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:56:35,440 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-03 21:56:36,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:56:36,810 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:56:36,811 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-03 21:56:36,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2975c7e24/e210399eea0b4e159592c6992b28831e/FLAG1e34a9923 [2023-08-03 21:56:36,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2975c7e24/e210399eea0b4e159592c6992b28831e [2023-08-03 21:56:36,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:56:36,835 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:56:36,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:56:36,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:56:36,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:56:36,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:56:36" (1/1) ... [2023-08-03 21:56:36,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262b0c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:36, skipping insertion in model container [2023-08-03 21:56:36,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:56:36" (1/1) ... [2023-08-03 21:56:36,881 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:56:37,114 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i[30553,30566] [2023-08-03 21:56:37,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:56:37,128 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:56:37,162 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 21:56:37,164 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 21:56:37,180 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_35_double_lock_p3_vs_bound2.i[30553,30566] [2023-08-03 21:56:37,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:56:37,214 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:56:37,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37 WrapperNode [2023-08-03 21:56:37,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:56:37,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:56:37,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:56:37,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:56:37,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,274 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 130 [2023-08-03 21:56:37,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:56:37,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:56:37,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:56:37,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:56:37,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:56:37,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:56:37,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:56:37,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:56:37,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (1/1) ... [2023-08-03 21:56:37,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:56:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:56:37,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 21:56:37,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 21:56:37,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:56:37,370 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-03 21:56:37,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 21:56:37,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:56:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:56:37,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:56:37,372 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:56:37,480 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:56:37,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:56:37,650 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:56:37,784 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:56:37,784 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 21:56:37,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:56:37 BoogieIcfgContainer [2023-08-03 21:56:37,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:56:37,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:56:37,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:56:37,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:56:37,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:56:36" (1/3) ... [2023-08-03 21:56:37,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee61816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:56:37, skipping insertion in model container [2023-08-03 21:56:37,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:37" (2/3) ... [2023-08-03 21:56:37,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee61816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:56:37, skipping insertion in model container [2023-08-03 21:56:37,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:56:37" (3/3) ... [2023-08-03 21:56:37,803 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_35_double_lock_p3_vs_bound2.i [2023-08-03 21:56:37,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:56:37,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:56:37,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:56:37,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:56:37,881 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:56:37,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2023-08-03 21:56:37,957 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-03 21:56:37,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:37,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-03 21:56:37,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2023-08-03 21:56:37,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2023-08-03 21:56:37,968 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:37,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-03 21:56:37,978 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 166 flow [2023-08-03 21:56:37,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 166 flow [2023-08-03 21:56:37,998 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-08-03 21:56:37,998 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 6/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-03 21:56:38,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 2086 [2023-08-03 21:56:39,861 INFO L134 LiptonReduction]: Checked pairs total: 3860 [2023-08-03 21:56:39,862 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-03 21:56:39,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:56:39,890 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;@60bc6d59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:39,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:56:39,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:39,898 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-03 21:56:39,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:39,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:39,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:39,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:56:39,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 318532873, now seen corresponding path program 1 times [2023-08-03 21:56:39,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:39,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558365170] [2023-08-03 21:56:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:40,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:56:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:40,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:56:40,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:56:40,082 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:56:40,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:56:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:56:40,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:56:40,086 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 21:56:40,086 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:56:40,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:56:40,126 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:56:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2023-08-03 21:56:40,153 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-03 21:56:40,153 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:40,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-08-03 21:56:40,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2023-08-03 21:56:40,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:40,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:40,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:40,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:40,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:40,174 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-03 21:56:40,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:40,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2023-08-03 21:56:40,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 5190 [2023-08-03 21:56:42,230 INFO L134 LiptonReduction]: Checked pairs total: 14008 [2023-08-03 21:56:42,231 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-03 21:56:42,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:56:42,234 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;@60bc6d59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:42,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:56:42,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:42,240 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2023-08-03 21:56:42,240 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:42,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:42,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:42,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:56:42,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1232356084, now seen corresponding path program 1 times [2023-08-03 21:56:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682848950] [2023-08-03 21:56:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:42,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682848950] [2023-08-03 21:56:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682848950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:56:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505404551] [2023-08-03 21:56:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:56:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:56:42,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:56:42,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:56:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:42,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:56:42,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:56:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:42,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:56:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505404551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:56:42,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:56:42,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281019471] [2023-08-03 21:56:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:56:42,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:56:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:56:42,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 198 [2023-08-03 21:56:42,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:42,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:42,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 198 [2023-08-03 21:56:42,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:43,155 INFO L124 PetriNetUnfolderBase]: 3260/5103 cut-off events. [2023-08-03 21:56:43,156 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-03 21:56:43,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9795 conditions, 5103 events. 3260/5103 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 28506 event pairs, 235 based on Foata normal form. 0/4521 useless extension candidates. Maximal degree in co-relation 9784. Up to 3025 conditions per place. [2023-08-03 21:56:43,171 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 0 selfloop transitions, 0 changer transitions 82/82 dead transitions. [2023-08-03 21:56:43,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 317 flow [2023-08-03 21:56:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:56:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:56:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 536 transitions. [2023-08-03 21:56:43,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414141414141415 [2023-08-03 21:56:43,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 536 transitions. [2023-08-03 21:56:43,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 536 transitions. [2023-08-03 21:56:43,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:43,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 536 transitions. [2023-08-03 21:56:43,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:43,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:43,208 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:43,210 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 5 states and 536 transitions. [2023-08-03 21:56:43,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 317 flow [2023-08-03 21:56:43,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:56:43,224 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-03 21:56:43,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-03 21:56:43,230 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-03 21:56:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-03 21:56:43,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:43,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:56:43,231 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:56:43,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:56:43,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:56:43,437 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:56:43,438 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 21:56:43,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2023-08-03 21:56:43,454 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-03 21:56:43,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:43,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 237 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-08-03 21:56:43,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2023-08-03 21:56:43,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:43,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:43,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:43,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:43,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 21:56:43,467 INFO L124 PetriNetUnfolderBase]: 8/132 cut-off events. [2023-08-03 21:56:43,468 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 8/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2023-08-03 21:56:43,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 5190 [2023-08-03 21:56:45,386 INFO L134 LiptonReduction]: Checked pairs total: 12379 [2023-08-03 21:56:45,387 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-03 21:56:45,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:56:45,390 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;@60bc6d59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:45,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:56:45,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:45,392 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-03 21:56:45,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:45,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:45,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:56:45,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:45,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 770160419, now seen corresponding path program 1 times [2023-08-03 21:56:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:45,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030411034] [2023-08-03 21:56:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:45,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030411034] [2023-08-03 21:56:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030411034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:45,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:45,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:56:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227094073] [2023-08-03 21:56:45,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:45,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:56:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:56:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:56:45,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-03 21:56:45,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:45,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:45,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-03 21:56:45,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:46,128 INFO L124 PetriNetUnfolderBase]: 6558/9498 cut-off events. [2023-08-03 21:56:46,129 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-03 21:56:46,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18739 conditions, 9498 events. 6558/9498 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 50640 event pairs, 1732 based on Foata normal form. 0/7967 useless extension candidates. Maximal degree in co-relation 18728. Up to 8443 conditions per place. [2023-08-03 21:56:46,173 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 43 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 21:56:46,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 220 flow [2023-08-03 21:56:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:56:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:56:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-03 21:56:46,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168350168350169 [2023-08-03 21:56:46,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-03 21:56:46,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-03 21:56:46,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:46,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-03 21:56:46,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:46,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:46,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:46,178 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 307 transitions. [2023-08-03 21:56:46,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 220 flow [2023-08-03 21:56:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:56:46,181 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 113 flow [2023-08-03 21:56:46,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-03 21:56:46,182 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-03 21:56:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 113 flow [2023-08-03 21:56:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:46,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:46,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:46,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:56:46,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:46,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1272866872, now seen corresponding path program 1 times [2023-08-03 21:56:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072918712] [2023-08-03 21:56:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072918712] [2023-08-03 21:56:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072918712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:46,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:46,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:56:46,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633245322] [2023-08-03 21:56:46,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:46,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:56:46,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:56:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:56:46,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2023-08-03 21:56:46,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:46,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:46,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2023-08-03 21:56:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:47,359 INFO L124 PetriNetUnfolderBase]: 8957/12849 cut-off events. [2023-08-03 21:56:47,359 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2023-08-03 21:56:47,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26733 conditions, 12849 events. 8957/12849 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 71553 event pairs, 1804 based on Foata normal form. 96/11595 useless extension candidates. Maximal degree in co-relation 26720. Up to 9058 conditions per place. [2023-08-03 21:56:47,421 INFO L140 encePairwiseOnDemand]: 188/198 looper letters, 96 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2023-08-03 21:56:47,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 120 transitions, 524 flow [2023-08-03 21:56:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:56:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:56:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 696 transitions. [2023-08-03 21:56:47,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021645021645021 [2023-08-03 21:56:47,424 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 696 transitions. [2023-08-03 21:56:47,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 696 transitions. [2023-08-03 21:56:47,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:47,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 696 transitions. [2023-08-03 21:56:47,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.42857142857143) internal successors, (696), 7 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:47,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:47,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:47,433 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 113 flow. Second operand 7 states and 696 transitions. [2023-08-03 21:56:47,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 120 transitions, 524 flow [2023-08-03 21:56:47,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 120 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:56:47,438 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 229 flow [2023-08-03 21:56:47,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-03 21:56:47,440 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-08-03 21:56:47,441 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 229 flow [2023-08-03 21:56:47,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:47,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:47,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:47,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:56:47,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:47,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash 840622885, now seen corresponding path program 1 times [2023-08-03 21:56:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238892065] [2023-08-03 21:56:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:47,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238892065] [2023-08-03 21:56:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238892065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:47,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:47,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:56:47,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22405726] [2023-08-03 21:56:47,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:47,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:56:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:56:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:56:47,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-03 21:56:47,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:47,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:47,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-03 21:56:47,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:48,780 INFO L124 PetriNetUnfolderBase]: 10647/15407 cut-off events. [2023-08-03 21:56:48,780 INFO L125 PetriNetUnfolderBase]: For 7613/7725 co-relation queries the response was YES. [2023-08-03 21:56:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37889 conditions, 15407 events. 10647/15407 cut-off events. For 7613/7725 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 90075 event pairs, 1308 based on Foata normal form. 216/14130 useless extension candidates. Maximal degree in co-relation 37871. Up to 8520 conditions per place. [2023-08-03 21:56:48,873 INFO L140 encePairwiseOnDemand]: 187/198 looper letters, 127 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2023-08-03 21:56:48,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 808 flow [2023-08-03 21:56:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:56:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:56:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 880 transitions. [2023-08-03 21:56:48,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2023-08-03 21:56:48,877 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 880 transitions. [2023-08-03 21:56:48,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 880 transitions. [2023-08-03 21:56:48,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:48,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 880 transitions. [2023-08-03 21:56:48,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:48,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:48,882 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:48,882 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 229 flow. Second operand 9 states and 880 transitions. [2023-08-03 21:56:48,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 157 transitions, 808 flow [2023-08-03 21:56:48,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 157 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 21:56:48,912 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 323 flow [2023-08-03 21:56:48,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-03 21:56:48,913 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2023-08-03 21:56:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 323 flow [2023-08-03 21:56:48,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:48,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:48,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:56:48,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:48,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1114841003, now seen corresponding path program 1 times [2023-08-03 21:56:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654075278] [2023-08-03 21:56:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:48,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:56:48,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:48,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654075278] [2023-08-03 21:56:48,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654075278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:48,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:48,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:56:48,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371253573] [2023-08-03 21:56:48,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:48,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:56:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:56:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:56:49,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2023-08-03 21:56:49,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:49,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:49,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2023-08-03 21:56:49,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:50,073 INFO L124 PetriNetUnfolderBase]: 12075/17383 cut-off events. [2023-08-03 21:56:50,074 INFO L125 PetriNetUnfolderBase]: For 15129/15397 co-relation queries the response was YES. [2023-08-03 21:56:50,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46972 conditions, 17383 events. 12075/17383 cut-off events. For 15129/15397 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 103125 event pairs, 2144 based on Foata normal form. 96/15838 useless extension candidates. Maximal degree in co-relation 46951. Up to 13545 conditions per place. [2023-08-03 21:56:50,163 INFO L140 encePairwiseOnDemand]: 188/198 looper letters, 111 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-03 21:56:50,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 144 transitions, 888 flow [2023-08-03 21:56:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:56:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:56:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 690 transitions. [2023-08-03 21:56:50,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2023-08-03 21:56:50,165 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 690 transitions. [2023-08-03 21:56:50,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 690 transitions. [2023-08-03 21:56:50,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:50,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 690 transitions. [2023-08-03 21:56:50,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.57142857142857) internal successors, (690), 7 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:50,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:50,169 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:50,169 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 323 flow. Second operand 7 states and 690 transitions. [2023-08-03 21:56:50,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 144 transitions, 888 flow [2023-08-03 21:56:50,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 144 transitions, 816 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-03 21:56:50,223 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 508 flow [2023-08-03 21:56:50,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2023-08-03 21:56:50,224 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-08-03 21:56:50,225 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 508 flow [2023-08-03 21:56:50,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:50,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:50,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:56:50,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:50,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1915362322, now seen corresponding path program 1 times [2023-08-03 21:56:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117556853] [2023-08-03 21:56:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:56:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117556853] [2023-08-03 21:56:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117556853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:50,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:56:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259263733] [2023-08-03 21:56:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:56:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:56:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:56:50,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-03 21:56:50,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:50,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-03 21:56:50,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:51,775 INFO L124 PetriNetUnfolderBase]: 13990/20290 cut-off events. [2023-08-03 21:56:51,775 INFO L125 PetriNetUnfolderBase]: For 28665/28729 co-relation queries the response was YES. [2023-08-03 21:56:51,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58794 conditions, 20290 events. 13990/20290 cut-off events. For 28665/28729 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 125010 event pairs, 2008 based on Foata normal form. 220/18712 useless extension candidates. Maximal degree in co-relation 58769. Up to 13004 conditions per place. [2023-08-03 21:56:51,883 INFO L140 encePairwiseOnDemand]: 187/198 looper letters, 143 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2023-08-03 21:56:51,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 187 transitions, 1239 flow [2023-08-03 21:56:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:56:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:56:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 871 transitions. [2023-08-03 21:56:51,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887766554433221 [2023-08-03 21:56:51,886 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 871 transitions. [2023-08-03 21:56:51,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 871 transitions. [2023-08-03 21:56:51,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:51,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 871 transitions. [2023-08-03 21:56:51,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.77777777777777) internal successors, (871), 9 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:51,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:51,891 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:51,891 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 508 flow. Second operand 9 states and 871 transitions. [2023-08-03 21:56:51,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 187 transitions, 1239 flow [2023-08-03 21:56:52,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 187 transitions, 1213 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-03 21:56:52,320 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 687 flow [2023-08-03 21:56:52,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2023-08-03 21:56:52,320 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2023-08-03 21:56:52,321 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 687 flow [2023-08-03 21:56:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:52,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:56:52,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:52,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 258555264, now seen corresponding path program 1 times [2023-08-03 21:56:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643962845] [2023-08-03 21:56:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:56:52,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:52,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643962845] [2023-08-03 21:56:52,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643962845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:52,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:52,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 21:56:52,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067791961] [2023-08-03 21:56:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 21:56:52,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:52,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 21:56:52,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-03 21:56:52,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 198 [2023-08-03 21:56:52,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:52,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:52,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 198 [2023-08-03 21:56:52,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:55,439 INFO L124 PetriNetUnfolderBase]: 23595/33455 cut-off events. [2023-08-03 21:56:55,439 INFO L125 PetriNetUnfolderBase]: For 82212/82480 co-relation queries the response was YES. [2023-08-03 21:56:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103567 conditions, 33455 events. 23595/33455 cut-off events. For 82212/82480 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 210489 event pairs, 1368 based on Foata normal form. 808/31421 useless extension candidates. Maximal degree in co-relation 103538. Up to 13810 conditions per place. [2023-08-03 21:56:55,608 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 242 selfloop transitions, 103 changer transitions 0/352 dead transitions. [2023-08-03 21:56:55,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 352 transitions, 2655 flow [2023-08-03 21:56:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 21:56:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 21:56:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1421 transitions. [2023-08-03 21:56:55,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47845117845117846 [2023-08-03 21:56:55,612 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1421 transitions. [2023-08-03 21:56:55,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1421 transitions. [2023-08-03 21:56:55,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:55,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1421 transitions. [2023-08-03 21:56:55,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.73333333333333) internal successors, (1421), 15 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:55,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:55,622 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:55,622 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 687 flow. Second operand 15 states and 1421 transitions. [2023-08-03 21:56:55,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 352 transitions, 2655 flow [2023-08-03 21:56:56,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 352 transitions, 2415 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-03 21:56:56,276 INFO L231 Difference]: Finished difference. Result has 97 places, 162 transitions, 1578 flow [2023-08-03 21:56:56,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1578, PETRI_PLACES=97, PETRI_TRANSITIONS=162} [2023-08-03 21:56:56,276 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2023-08-03 21:56:56,276 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 162 transitions, 1578 flow [2023-08-03 21:56:56,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:56,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:56,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:56:56,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 21:56:56,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:56,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash -162853781, now seen corresponding path program 1 times [2023-08-03 21:56:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:56,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851686489] [2023-08-03 21:56:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:56,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:56:56,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:56,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851686489] [2023-08-03 21:56:56,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851686489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:56,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:56:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:56:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471592776] [2023-08-03 21:56:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:56:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:56:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:56:56,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-03 21:56:56,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 162 transitions, 1578 flow. Second operand has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:56:56,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:56,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-03 21:56:56,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:59,860 INFO L124 PetriNetUnfolderBase]: 24083/34755 cut-off events. [2023-08-03 21:56:59,860 INFO L125 PetriNetUnfolderBase]: For 154700/155432 co-relation queries the response was YES. [2023-08-03 21:56:59,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128916 conditions, 34755 events. 24083/34755 cut-off events. For 154700/155432 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 227184 event pairs, 4060 based on Foata normal form. 172/32013 useless extension candidates. Maximal degree in co-relation 128878. Up to 25927 conditions per place. [2023-08-03 21:57:00,073 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 254 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2023-08-03 21:57:00,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 332 transitions, 3264 flow [2023-08-03 21:57:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:57:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:57:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1314 transitions. [2023-08-03 21:57:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2023-08-03 21:57:00,078 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1314 transitions. [2023-08-03 21:57:00,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1314 transitions. [2023-08-03 21:57:00,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:00,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1314 transitions. [2023-08-03 21:57:00,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.85714285714286) internal successors, (1314), 14 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:00,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:00,085 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:00,085 INFO L175 Difference]: Start difference. First operand has 97 places, 162 transitions, 1578 flow. Second operand 14 states and 1314 transitions. [2023-08-03 21:57:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 332 transitions, 3264 flow [2023-08-03 21:57:01,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 332 transitions, 3000 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-03 21:57:01,200 INFO L231 Difference]: Finished difference. Result has 108 places, 201 transitions, 2040 flow [2023-08-03 21:57:01,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2040, PETRI_PLACES=108, PETRI_TRANSITIONS=201} [2023-08-03 21:57:01,200 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 61 predicate places. [2023-08-03 21:57:01,201 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 201 transitions, 2040 flow [2023-08-03 21:57:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:01,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:01,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:01,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:57:01,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:01,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash -188566421, now seen corresponding path program 2 times [2023-08-03 21:57:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:01,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918124445] [2023-08-03 21:57:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:01,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:57:01,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918124445] [2023-08-03 21:57:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918124445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:01,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:01,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:57:01,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376597420] [2023-08-03 21:57:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:01,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:57:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:57:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:57:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-03 21:57:01,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 201 transitions, 2040 flow. Second operand has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:01,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:01,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-03 21:57:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:57:05,025 INFO L124 PetriNetUnfolderBase]: 26180/37440 cut-off events. [2023-08-03 21:57:05,025 INFO L125 PetriNetUnfolderBase]: For 195500/196632 co-relation queries the response was YES. [2023-08-03 21:57:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144316 conditions, 37440 events. 26180/37440 cut-off events. For 195500/196632 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 245065 event pairs, 4244 based on Foata normal form. 240/34547 useless extension candidates. Maximal degree in co-relation 144272. Up to 28044 conditions per place. [2023-08-03 21:57:05,445 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 287 selfloop transitions, 81 changer transitions 0/375 dead transitions. [2023-08-03 21:57:05,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 375 transitions, 3826 flow [2023-08-03 21:57:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:57:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:57:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1311 transitions. [2023-08-03 21:57:05,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47294372294372294 [2023-08-03 21:57:05,451 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1311 transitions. [2023-08-03 21:57:05,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1311 transitions. [2023-08-03 21:57:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:05,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1311 transitions. [2023-08-03 21:57:05,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.64285714285714) internal successors, (1311), 14 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:05,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:05,463 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:05,464 INFO L175 Difference]: Start difference. First operand has 108 places, 201 transitions, 2040 flow. Second operand 14 states and 1311 transitions. [2023-08-03 21:57:05,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 375 transitions, 3826 flow [2023-08-03 21:57:07,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 375 transitions, 3589 flow, removed 97 selfloop flow, removed 5 redundant places. [2023-08-03 21:57:07,383 INFO L231 Difference]: Finished difference. Result has 121 places, 235 transitions, 2449 flow [2023-08-03 21:57:07,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2449, PETRI_PLACES=121, PETRI_TRANSITIONS=235} [2023-08-03 21:57:07,384 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 74 predicate places. [2023-08-03 21:57:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 235 transitions, 2449 flow [2023-08-03 21:57:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 21:57:07,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:07,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash -636599694, now seen corresponding path program 1 times [2023-08-03 21:57:07,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189607059] [2023-08-03 21:57:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:57:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189607059] [2023-08-03 21:57:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189607059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:07,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:07,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-03 21:57:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811583284] [2023-08-03 21:57:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 21:57:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 21:57:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-03 21:57:07,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 198 [2023-08-03 21:57:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 235 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:07,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:07,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 198 [2023-08-03 21:57:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:57:12,567 INFO L124 PetriNetUnfolderBase]: 32644/45992 cut-off events. [2023-08-03 21:57:12,567 INFO L125 PetriNetUnfolderBase]: For 301190/301782 co-relation queries the response was YES. [2023-08-03 21:57:12,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182583 conditions, 45992 events. 32644/45992 cut-off events. For 301190/301782 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 297237 event pairs, 2072 based on Foata normal form. 500/42733 useless extension candidates. Maximal degree in co-relation 182534. Up to 18184 conditions per place. [2023-08-03 21:57:12,868 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 311 selfloop transitions, 179 changer transitions 10/508 dead transitions. [2023-08-03 21:57:12,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 508 transitions, 5144 flow [2023-08-03 21:57:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 21:57:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 21:57:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1572 transitions. [2023-08-03 21:57:12,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46702317290552586 [2023-08-03 21:57:12,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1572 transitions. [2023-08-03 21:57:12,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1572 transitions. [2023-08-03 21:57:12,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:12,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1572 transitions. [2023-08-03 21:57:12,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.47058823529412) internal successors, (1572), 17 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:12,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:12,881 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:12,881 INFO L175 Difference]: Start difference. First operand has 121 places, 235 transitions, 2449 flow. Second operand 17 states and 1572 transitions. [2023-08-03 21:57:12,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 508 transitions, 5144 flow [2023-08-03 21:57:15,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 508 transitions, 4822 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-08-03 21:57:15,145 INFO L231 Difference]: Finished difference. Result has 134 places, 270 transitions, 3105 flow [2023-08-03 21:57:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3105, PETRI_PLACES=134, PETRI_TRANSITIONS=270} [2023-08-03 21:57:15,146 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 87 predicate places. [2023-08-03 21:57:15,146 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 270 transitions, 3105 flow [2023-08-03 21:57:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:15,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:15,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 21:57:15,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:15,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1735031928, now seen corresponding path program 1 times [2023-08-03 21:57:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143079699] [2023-08-03 21:57:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:57:15,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:15,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143079699] [2023-08-03 21:57:15,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143079699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:15,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:15,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:57:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961816503] [2023-08-03 21:57:15,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:15,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:57:15,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:15,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:57:15,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:57:15,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-03 21:57:15,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 270 transitions, 3105 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-03 21:57:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:57:20,744 INFO L124 PetriNetUnfolderBase]: 33727/48503 cut-off events. [2023-08-03 21:57:20,745 INFO L125 PetriNetUnfolderBase]: For 396842/398234 co-relation queries the response was YES. [2023-08-03 21:57:20,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207488 conditions, 48503 events. 33727/48503 cut-off events. For 396842/398234 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 329869 event pairs, 3820 based on Foata normal form. 712/45507 useless extension candidates. Maximal degree in co-relation 207436. Up to 26016 conditions per place. [2023-08-03 21:57:21,148 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 303 selfloop transitions, 197 changer transitions 0/508 dead transitions. [2023-08-03 21:57:21,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 508 transitions, 5952 flow [2023-08-03 21:57:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 21:57:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 21:57:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1565 transitions. [2023-08-03 21:57:21,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649435531788473 [2023-08-03 21:57:21,154 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1565 transitions. [2023-08-03 21:57:21,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1565 transitions. [2023-08-03 21:57:21,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:21,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1565 transitions. [2023-08-03 21:57:21,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.05882352941177) internal successors, (1565), 17 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:21,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:21,163 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:21,163 INFO L175 Difference]: Start difference. First operand has 134 places, 270 transitions, 3105 flow. Second operand 17 states and 1565 transitions. [2023-08-03 21:57:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 508 transitions, 5952 flow [2023-08-03 21:57:24,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 508 transitions, 5688 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-03 21:57:24,854 INFO L231 Difference]: Finished difference. Result has 145 places, 335 transitions, 4476 flow [2023-08-03 21:57:24,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4476, PETRI_PLACES=145, PETRI_TRANSITIONS=335} [2023-08-03 21:57:24,855 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 98 predicate places. [2023-08-03 21:57:24,855 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 335 transitions, 4476 flow [2023-08-03 21:57:24,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:24,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:24,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 21:57:24,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:24,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1883645742, now seen corresponding path program 1 times [2023-08-03 21:57:24,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189392240] [2023-08-03 21:57:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:57:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:24,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189392240] [2023-08-03 21:57:24,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189392240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:24,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:57:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686408957] [2023-08-03 21:57:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:24,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:57:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:57:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:57:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-03 21:57:25,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 335 transitions, 4476 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:25,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-03 21:57:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:57:31,625 INFO L124 PetriNetUnfolderBase]: 36997/53549 cut-off events. [2023-08-03 21:57:31,625 INFO L125 PetriNetUnfolderBase]: For 560514/562394 co-relation queries the response was YES. [2023-08-03 21:57:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247623 conditions, 53549 events. 36997/53549 cut-off events. For 560514/562394 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 374020 event pairs, 5976 based on Foata normal form. 688/50111 useless extension candidates. Maximal degree in co-relation 247564. Up to 39418 conditions per place. [2023-08-03 21:57:32,085 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 390 selfloop transitions, 121 changer transitions 0/519 dead transitions. [2023-08-03 21:57:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 519 transitions, 7036 flow [2023-08-03 21:57:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 21:57:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 21:57:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1375 transitions. [2023-08-03 21:57:32,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-03 21:57:32,089 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1375 transitions. [2023-08-03 21:57:32,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1375 transitions. [2023-08-03 21:57:32,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:32,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1375 transitions. [2023-08-03 21:57:32,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.66666666666667) internal successors, (1375), 15 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:32,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:32,096 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:32,096 INFO L175 Difference]: Start difference. First operand has 145 places, 335 transitions, 4476 flow. Second operand 15 states and 1375 transitions. [2023-08-03 21:57:32,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 519 transitions, 7036 flow [2023-08-03 21:57:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 519 transitions, 6668 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-03 21:57:39,025 INFO L231 Difference]: Finished difference. Result has 158 places, 367 transitions, 5137 flow [2023-08-03 21:57:39,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5137, PETRI_PLACES=158, PETRI_TRANSITIONS=367} [2023-08-03 21:57:39,026 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 111 predicate places. [2023-08-03 21:57:39,026 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 367 transitions, 5137 flow [2023-08-03 21:57:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:39,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:57:39,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:39,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1611433204, now seen corresponding path program 2 times [2023-08-03 21:57:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277726260] [2023-08-03 21:57:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:57:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277726260] [2023-08-03 21:57:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277726260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:39,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:39,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:57:39,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779845990] [2023-08-03 21:57:39,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:39,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:57:39,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:57:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:57:39,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-03 21:57:39,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 367 transitions, 5137 flow. Second operand has 7 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:39,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:39,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-03 21:57:39,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:57:46,101 INFO L124 PetriNetUnfolderBase]: 38797/56289 cut-off events. [2023-08-03 21:57:46,101 INFO L125 PetriNetUnfolderBase]: For 631942/634186 co-relation queries the response was YES. [2023-08-03 21:57:46,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264842 conditions, 56289 events. 38797/56289 cut-off events. For 631942/634186 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 397121 event pairs, 6788 based on Foata normal form. 568/52559 useless extension candidates. Maximal degree in co-relation 264780. Up to 46472 conditions per place. [2023-08-03 21:57:46,808 INFO L140 encePairwiseOnDemand]: 185/198 looper letters, 407 selfloop transitions, 76 changer transitions 0/497 dead transitions. [2023-08-03 21:57:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 497 transitions, 7085 flow [2023-08-03 21:57:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:57:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:57:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2023-08-03 21:57:46,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47264309764309764 [2023-08-03 21:57:46,810 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2023-08-03 21:57:46,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2023-08-03 21:57:46,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:57:46,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2023-08-03 21:57:46,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:46,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:46,816 INFO L175 Difference]: Start difference. First operand has 158 places, 367 transitions, 5137 flow. Second operand 12 states and 1123 transitions. [2023-08-03 21:57:46,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 497 transitions, 7085 flow [2023-08-03 21:57:53,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 497 transitions, 6728 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-08-03 21:57:53,027 INFO L231 Difference]: Finished difference. Result has 161 places, 394 transitions, 5546 flow [2023-08-03 21:57:53,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5546, PETRI_PLACES=161, PETRI_TRANSITIONS=394} [2023-08-03 21:57:53,027 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 114 predicate places. [2023-08-03 21:57:53,028 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 394 transitions, 5546 flow [2023-08-03 21:57:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:57:53,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:57:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 21:57:53,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:57:53,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:57:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -693459246, now seen corresponding path program 3 times [2023-08-03 21:57:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:57:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220421891] [2023-08-03 21:57:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:57:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:57:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:57:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:57:53,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:57:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220421891] [2023-08-03 21:57:53,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220421891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:57:53,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:57:53,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:57:53,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759101878] [2023-08-03 21:57:53,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:57:53,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:57:53,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:57:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:57:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:57:53,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-03 21:57:53,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 394 transitions, 5546 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:57:53,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:57:53,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-03 21:57:53,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:01,376 INFO L124 PetriNetUnfolderBase]: 43053/62197 cut-off events. [2023-08-03 21:58:01,376 INFO L125 PetriNetUnfolderBase]: For 762622/765094 co-relation queries the response was YES. [2023-08-03 21:58:01,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293677 conditions, 62197 events. 43053/62197 cut-off events. For 762622/765094 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 442983 event pairs, 6144 based on Foata normal form. 872/58379 useless extension candidates. Maximal degree in co-relation 293612. Up to 33894 conditions per place. [2023-08-03 21:58:01,991 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 388 selfloop transitions, 224 changer transitions 0/620 dead transitions. [2023-08-03 21:58:01,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 620 transitions, 8692 flow [2023-08-03 21:58:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 21:58:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 21:58:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1563 transitions. [2023-08-03 21:58:01,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464349376114082 [2023-08-03 21:58:01,994 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1563 transitions. [2023-08-03 21:58:01,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1563 transitions. [2023-08-03 21:58:01,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:01,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1563 transitions. [2023-08-03 21:58:01,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.94117647058823) internal successors, (1563), 17 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:02,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:02,001 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 198.0) internal successors, (3564), 18 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:02,001 INFO L175 Difference]: Start difference. First operand has 161 places, 394 transitions, 5546 flow. Second operand 17 states and 1563 transitions. [2023-08-03 21:58:02,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 620 transitions, 8692 flow [2023-08-03 21:58:09,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 620 transitions, 8427 flow, removed 128 selfloop flow, removed 2 redundant places. [2023-08-03 21:58:09,482 INFO L231 Difference]: Finished difference. Result has 181 places, 437 transitions, 6844 flow [2023-08-03 21:58:09,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6844, PETRI_PLACES=181, PETRI_TRANSITIONS=437} [2023-08-03 21:58:09,482 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 134 predicate places. [2023-08-03 21:58:09,482 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 437 transitions, 6844 flow [2023-08-03 21:58:09,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:09,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:09,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:58:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 21:58:09,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:09,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -823696632, now seen corresponding path program 2 times [2023-08-03 21:58:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:09,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799778124] [2023-08-03 21:58:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:58:09,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:09,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799778124] [2023-08-03 21:58:09,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799778124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:09,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:09,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:58:09,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037558544] [2023-08-03 21:58:09,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:09,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:58:09,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:09,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:58:09,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:58:09,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 198 [2023-08-03 21:58:09,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 437 transitions, 6844 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:09,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:09,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 198 [2023-08-03 21:58:09,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:19,064 INFO L124 PetriNetUnfolderBase]: 45083/65023 cut-off events. [2023-08-03 21:58:19,064 INFO L125 PetriNetUnfolderBase]: For 892898/895250 co-relation queries the response was YES. [2023-08-03 21:58:19,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323564 conditions, 65023 events. 45083/65023 cut-off events. For 892898/895250 co-relation queries the response was YES. Maximal size of possible extension queue 2417. Compared 465033 event pairs, 7764 based on Foata normal form. 848/60895 useless extension candidates. Maximal degree in co-relation 323492. Up to 50034 conditions per place. [2023-08-03 21:58:19,738 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 482 selfloop transitions, 122 changer transitions 0/612 dead transitions. [2023-08-03 21:58:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 612 transitions, 9556 flow [2023-08-03 21:58:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 21:58:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 21:58:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-08-03 21:58:19,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2023-08-03 21:58:19,741 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-08-03 21:58:19,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-08-03 21:58:19,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-08-03 21:58:19,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:19,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:19,746 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:19,746 INFO L175 Difference]: Start difference. First operand has 181 places, 437 transitions, 6844 flow. Second operand 15 states and 1377 transitions. [2023-08-03 21:58:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 612 transitions, 9556 flow [2023-08-03 21:58:33,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 612 transitions, 9132 flow, removed 203 selfloop flow, removed 5 redundant places. [2023-08-03 21:58:33,056 INFO L231 Difference]: Finished difference. Result has 193 places, 456 transitions, 7311 flow [2023-08-03 21:58:33,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=6498, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7311, PETRI_PLACES=193, PETRI_TRANSITIONS=456} [2023-08-03 21:58:33,057 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2023-08-03 21:58:33,057 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 456 transitions, 7311 flow [2023-08-03 21:58:33,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:33,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:58:33,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:58:33,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 21:58:33,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:58:33,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:58:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash -794886448, now seen corresponding path program 1 times [2023-08-03 21:58:33,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:58:33,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817044990] [2023-08-03 21:58:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:58:33,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:58:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:58:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:58:33,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:58:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817044990] [2023-08-03 21:58:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817044990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:58:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:58:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 21:58:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939256429] [2023-08-03 21:58:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:58:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 21:58:33,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:58:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 21:58:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-03 21:58:33,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 198 [2023-08-03 21:58:33,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 456 transitions, 7311 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:33,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:58:33,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 198 [2023-08-03 21:58:33,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:58:45,740 INFO L124 PetriNetUnfolderBase]: 59308/83584 cut-off events. [2023-08-03 21:58:45,740 INFO L125 PetriNetUnfolderBase]: For 1157304/1159696 co-relation queries the response was YES. [2023-08-03 21:58:46,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416767 conditions, 83584 events. 59308/83584 cut-off events. For 1157304/1159696 co-relation queries the response was YES. Maximal size of possible extension queue 3025. Compared 590116 event pairs, 4048 based on Foata normal form. 1208/78467 useless extension candidates. Maximal degree in co-relation 416692. Up to 39026 conditions per place. [2023-08-03 21:58:47,106 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 453 selfloop transitions, 401 changer transitions 0/867 dead transitions. [2023-08-03 21:58:47,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 867 transitions, 13955 flow [2023-08-03 21:58:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 21:58:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 21:58:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1406 transitions. [2023-08-03 21:58:47,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734006734006734 [2023-08-03 21:58:47,108 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1406 transitions. [2023-08-03 21:58:47,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1406 transitions. [2023-08-03 21:58:47,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:58:47,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1406 transitions. [2023-08-03 21:58:47,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.73333333333333) internal successors, (1406), 15 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:47,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:47,113 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:58:47,113 INFO L175 Difference]: Start difference. First operand has 193 places, 456 transitions, 7311 flow. Second operand 15 states and 1406 transitions. [2023-08-03 21:58:47,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 867 transitions, 13955 flow [2023-08-03 21:59:05,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 867 transitions, 13444 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-08-03 21:59:05,057 INFO L231 Difference]: Finished difference. Result has 205 places, 635 transitions, 11766 flow [2023-08-03 21:59:05,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11766, PETRI_PLACES=205, PETRI_TRANSITIONS=635} [2023-08-03 21:59:05,058 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 158 predicate places. [2023-08-03 21:59:05,058 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 635 transitions, 11766 flow [2023-08-03 21:59:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:05,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:05,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 21:59:05,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:05,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1430383137, now seen corresponding path program 1 times [2023-08-03 21:59:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916765660] [2023-08-03 21:59:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:05,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916765660] [2023-08-03 21:59:05,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916765660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:59:05,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136479150] [2023-08-03 21:59:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:05,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:59:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:59:05,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:59:05,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:59:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:05,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 21:59:05,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:59:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:05,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:59:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:59:05,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136479150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:59:05,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:59:05,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-03 21:59:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129761791] [2023-08-03 21:59:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:59:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 21:59:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 21:59:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-03 21:59:05,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 198 [2023-08-03 21:59:05,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 635 transitions, 11766 flow. Second operand has 15 states, 15 states have (on average 77.33333333333333) internal successors, (1160), 15 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:05,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:05,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 198 [2023-08-03 21:59:05,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:59:22,587 INFO L124 PetriNetUnfolderBase]: 61942/89022 cut-off events. [2023-08-03 21:59:22,587 INFO L125 PetriNetUnfolderBase]: For 1790128/1792548 co-relation queries the response was YES. [2023-08-03 21:59:24,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504012 conditions, 89022 events. 61942/89022 cut-off events. For 1790128/1792548 co-relation queries the response was YES. Maximal size of possible extension queue 3439. Compared 659275 event pairs, 5208 based on Foata normal form. 2152/84599 useless extension candidates. Maximal degree in co-relation 503928. Up to 24191 conditions per place. [2023-08-03 21:59:25,053 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 567 selfloop transitions, 688 changer transitions 0/1264 dead transitions. [2023-08-03 21:59:25,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1264 transitions, 21217 flow [2023-08-03 21:59:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-03 21:59:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-03 21:59:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3950 transitions. [2023-08-03 21:59:25,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336846728151076 [2023-08-03 21:59:25,058 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3950 transitions. [2023-08-03 21:59:25,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3950 transitions. [2023-08-03 21:59:25,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:59:25,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3950 transitions. [2023-08-03 21:59:25,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:25,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 198.0) internal successors, (9306), 47 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:25,072 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 198.0) internal successors, (9306), 47 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:25,072 INFO L175 Difference]: Start difference. First operand has 205 places, 635 transitions, 11766 flow. Second operand 46 states and 3950 transitions. [2023-08-03 21:59:25,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1264 transitions, 21217 flow [2023-08-03 21:59:57,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1264 transitions, 20331 flow, removed 340 selfloop flow, removed 6 redundant places. [2023-08-03 21:59:57,872 INFO L231 Difference]: Finished difference. Result has 260 places, 798 transitions, 16700 flow [2023-08-03 21:59:57,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=11139, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16700, PETRI_PLACES=260, PETRI_TRANSITIONS=798} [2023-08-03 21:59:57,873 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 213 predicate places. [2023-08-03 21:59:57,873 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 798 transitions, 16700 flow [2023-08-03 21:59:57,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.33333333333333) internal successors, (1160), 15 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:57,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:59:57,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:59:57,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 21:59:58,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 21:59:58,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:59:58,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:59:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash 618335872, now seen corresponding path program 1 times [2023-08-03 21:59:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:59:58,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622525326] [2023-08-03 21:59:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:59:58,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:59:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:59:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:59:58,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:59:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622525326] [2023-08-03 21:59:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622525326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:59:58,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:59:58,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-03 21:59:58,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116580772] [2023-08-03 21:59:58,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:59:58,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 21:59:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:59:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 21:59:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-03 21:59:58,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 198 [2023-08-03 21:59:58,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 798 transitions, 16700 flow. Second operand has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:59:58,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:59:58,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 198 [2023-08-03 21:59:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand