/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longer-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:23:30,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:23:30,917 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:23:30,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:23:30,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:23:30,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:23:30,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:23:30,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:23:30,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:23:30,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:23:30,965 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:23:30,965 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:23:30,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:23:30,967 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:23:30,967 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:23:30,968 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:23:30,968 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:23:30,968 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:23:30,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:23:30,969 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:23:30,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:23:30,969 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:23:30,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:23:30,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:23:30,971 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:23:30,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:23:30,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:23:30,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:23:30,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:23:30,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:23:30,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:23:30,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:23:30,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:23:30,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:23:30,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:23:30,975 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:23:30,975 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:23:31,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:23:31,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:23:31,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:23:31,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:23:31,243 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:23:31,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longer-2_bound2.i [2023-08-04 04:23:32,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:23:32,601 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:23:32,602 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longer-2_bound2.i [2023-08-04 04:23:32,614 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a72c2744/3547cfc1d93847d9bb9c5679a012d2ec/FLAGb78758805 [2023-08-04 04:23:32,626 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a72c2744/3547cfc1d93847d9bb9c5679a012d2ec [2023-08-04 04:23:32,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:23:32,630 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:23:32,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:23:32,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:23:32,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:23:32,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:23:32" (1/1) ... [2023-08-04 04:23:32,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dec5ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:32, skipping insertion in model container [2023-08-04 04:23:32,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:23:32" (1/1) ... [2023-08-04 04:23:32,669 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:23:33,015 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_26_stack_cas_longer-2_bound2.i[31163,31176] [2023-08-04 04:23:33,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:23:33,043 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:23:33,073 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:23:33,074 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:23:33,104 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_26_stack_cas_longer-2_bound2.i[31163,31176] [2023-08-04 04:23:33,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:23:33,152 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:23:33,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33 WrapperNode [2023-08-04 04:23:33,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:23:33,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:23:33,155 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:23:33,155 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:23:33,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,208 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 192 [2023-08-04 04:23:33,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:23:33,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:23:33,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:23:33,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:23:33,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:23:33,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:23:33,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:23:33,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:23:33,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (1/1) ... [2023-08-04 04:23:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:23:33,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:33,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 04:23:33,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 04:23:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:23:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 04:23:33,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 04:23:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:23:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:23:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:23:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:23:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:23:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:23:33,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:23:33,323 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:23:33,442 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:23:33,444 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:23:33,785 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:23:33,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:23:33,968 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 04:23:33,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:23:33 BoogieIcfgContainer [2023-08-04 04:23:33,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:23:33,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:23:33,973 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:23:33,976 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:23:33,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:23:32" (1/3) ... [2023-08-04 04:23:33,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3744fcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:23:33, skipping insertion in model container [2023-08-04 04:23:33,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:33" (2/3) ... [2023-08-04 04:23:33,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3744fcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:23:33, skipping insertion in model container [2023-08-04 04:23:33,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:23:33" (3/3) ... [2023-08-04 04:23:33,979 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_26_stack_cas_longer-2_bound2.i [2023-08-04 04:23:33,986 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:23:33,995 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:23:33,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:23:33,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:23:34,062 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:23:34,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,164 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:23:34,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:34,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:23:34,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,185 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:23:34,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:34,247 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:23:34,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:34,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:23:34,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 04:23:38,179 INFO L134 LiptonReduction]: Checked pairs total: 2969 [2023-08-04 04:23:38,179 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 04:23:38,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:23:38,195 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;@5649230a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:23:38,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:23:38,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:23:38,201 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-04 04:23:38,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:38,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:38,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:38,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:38,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash -938850934, now seen corresponding path program 1 times [2023-08-04 04:23:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865956611] [2023-08-04 04:23:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:38,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865956611] [2023-08-04 04:23:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865956611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:38,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:23:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612575535] [2023-08-04 04:23:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:23:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:23:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:23:38,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2023-08-04 04:23:38,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:38,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2023-08-04 04:23:38,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:38,526 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-08-04 04:23:38,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:38,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 130 events. 61/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 321 event pairs, 3 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 248. Up to 115 conditions per place. [2023-08-04 04:23:38,528 INFO L140 encePairwiseOnDemand]: 221/226 looper letters, 24 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 04:23:38,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 115 flow [2023-08-04 04:23:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:23:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:23:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-04 04:23:38,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-04 04:23:38,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-04 04:23:38,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-04 04:23:38,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:38,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-04 04:23:38,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,558 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 336 transitions. [2023-08-04 04:23:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 115 flow [2023-08-04 04:23:38,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:23:38,562 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 57 flow [2023-08-04 04:23:38,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-08-04 04:23:38,567 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-04 04:23:38,567 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 57 flow [2023-08-04 04:23:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:38,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:23:38,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:38,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -491700112, now seen corresponding path program 1 times [2023-08-04 04:23:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703635938] [2023-08-04 04:23:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:38,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:38,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703635938] [2023-08-04 04:23:38,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703635938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:38,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:23:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022683632] [2023-08-04 04:23:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:23:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:23:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:23:38,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 226 [2023-08-04 04:23:38,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:38,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 226 [2023-08-04 04:23:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:38,783 INFO L124 PetriNetUnfolderBase]: 73/158 cut-off events. [2023-08-04 04:23:38,783 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 04:23:38,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 158 events. 73/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 425 event pairs, 21 based on Foata normal form. 4/121 useless extension candidates. Maximal degree in co-relation 308. Up to 101 conditions per place. [2023-08-04 04:23:38,784 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 28 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 04:23:38,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 135 flow [2023-08-04 04:23:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:23:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:23:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 04:23:38,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941002949852507 [2023-08-04 04:23:38,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 04:23:38,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 04:23:38,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:38,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 04:23:38,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,792 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 57 flow. Second operand 3 states and 335 transitions. [2023-08-04 04:23:38,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 135 flow [2023-08-04 04:23:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 32 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:23:38,793 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 65 flow [2023-08-04 04:23:38,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-04 04:23:38,794 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-04 04:23:38,794 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 65 flow [2023-08-04 04:23:38,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:38,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:23:38,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:38,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -488589355, now seen corresponding path program 1 times [2023-08-04 04:23:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843519787] [2023-08-04 04:23:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:38,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843519787] [2023-08-04 04:23:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843519787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:38,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:38,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:23:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168648240] [2023-08-04 04:23:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:38,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:23:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:23:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:23:38,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 226 [2023-08-04 04:23:38,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:38,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:38,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 226 [2023-08-04 04:23:38,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:39,086 INFO L124 PetriNetUnfolderBase]: 104/225 cut-off events. [2023-08-04 04:23:39,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:39,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 225 events. 104/225 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 18 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 454. Up to 101 conditions per place. [2023-08-04 04:23:39,088 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 44 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-04 04:23:39,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 217 flow [2023-08-04 04:23:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:23:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:23:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 615 transitions. [2023-08-04 04:23:39,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45353982300884954 [2023-08-04 04:23:39,090 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 615 transitions. [2023-08-04 04:23:39,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 615 transitions. [2023-08-04 04:23:39,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:39,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 615 transitions. [2023-08-04 04:23:39,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.5) internal successors, (615), 6 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:39,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:39,096 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:39,096 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 65 flow. Second operand 6 states and 615 transitions. [2023-08-04 04:23:39,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 217 flow [2023-08-04 04:23:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 51 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:23:39,098 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 93 flow [2023-08-04 04:23:39,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-04 04:23:39,099 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2023-08-04 04:23:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 93 flow [2023-08-04 04:23:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:39,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:39,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:23:39,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:39,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2032773347, now seen corresponding path program 1 times [2023-08-04 04:23:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668158372] [2023-08-04 04:23:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:39,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668158372] [2023-08-04 04:23:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668158372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:39,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:39,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:23:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119535183] [2023-08-04 04:23:39,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:23:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:23:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:23:39,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 226 [2023-08-04 04:23:39,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:39,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:39,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 226 [2023-08-04 04:23:39,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:40,298 INFO L124 PetriNetUnfolderBase]: 121/268 cut-off events. [2023-08-04 04:23:40,298 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 04:23:40,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 268 events. 121/268 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 760 event pairs, 9 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 592. Up to 116 conditions per place. [2023-08-04 04:23:40,300 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 57 selfloop transitions, 17 changer transitions 1/76 dead transitions. [2023-08-04 04:23:40,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 350 flow [2023-08-04 04:23:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 04:23:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 04:23:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 944 transitions. [2023-08-04 04:23:40,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797264682220434 [2023-08-04 04:23:40,305 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 944 transitions. [2023-08-04 04:23:40,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 944 transitions. [2023-08-04 04:23:40,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:40,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 944 transitions. [2023-08-04 04:23:40,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.81818181818181) internal successors, (944), 11 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:40,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 226.0) internal successors, (2712), 12 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:40,312 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 226.0) internal successors, (2712), 12 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:40,312 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 93 flow. Second operand 11 states and 944 transitions. [2023-08-04 04:23:40,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 350 flow [2023-08-04 04:23:40,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:23:40,315 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 194 flow [2023-08-04 04:23:40,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-04 04:23:40,315 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2023-08-04 04:23:40,316 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 194 flow [2023-08-04 04:23:40,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:40,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:40,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:40,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:23:40,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:40,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash -23212586, now seen corresponding path program 1 times [2023-08-04 04:23:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:40,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705504799] [2023-08-04 04:23:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705504799] [2023-08-04 04:23:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705504799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:23:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76953147] [2023-08-04 04:23:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:40,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:23:40,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:23:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:40,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-04 04:23:41,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:23:41,066 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 04:23:41,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 04:23:41,395 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 04:23:41,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-04 04:23:41,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:23:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:41,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:23:41,497 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_142 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_142) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-04 04:23:41,637 INFO L322 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-04 04:23:41,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-04 04:23:41,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:23:41,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-04 04:23:41,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-04 04:23:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-04 04:23:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76953147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:23:41,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:23:41,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-04 04:23:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258963439] [2023-08-04 04:23:41,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:23:41,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 04:23:41,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 04:23:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=4, NotChecked=42, Total=552 [2023-08-04 04:23:41,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 226 [2023-08-04 04:23:41,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 57.166666666666664) internal successors, (1372), 24 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:41,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:41,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 226 [2023-08-04 04:23:41,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:45,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:47,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:49,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:51,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:53,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:55,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:58,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:24:00,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:24:00,657 INFO L124 PetriNetUnfolderBase]: 357/798 cut-off events. [2023-08-04 04:24:00,657 INFO L125 PetriNetUnfolderBase]: For 817/817 co-relation queries the response was YES. [2023-08-04 04:24:00,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2459 conditions, 798 events. 357/798 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3144 event pairs, 8 based on Foata normal form. 15/757 useless extension candidates. Maximal degree in co-relation 2394. Up to 161 conditions per place. [2023-08-04 04:24:00,666 INFO L140 encePairwiseOnDemand]: 210/226 looper letters, 184 selfloop transitions, 125 changer transitions 1/311 dead transitions. [2023-08-04 04:24:00,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 311 transitions, 1934 flow [2023-08-04 04:24:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-04 04:24:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-04 04:24:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2769 transitions. [2023-08-04 04:24:00,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27227138643067844 [2023-08-04 04:24:00,676 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2769 transitions. [2023-08-04 04:24:00,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2769 transitions. [2023-08-04 04:24:00,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:00,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2769 transitions. [2023-08-04 04:24:00,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 61.53333333333333) internal successors, (2769), 45 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:00,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 226.0) internal successors, (10396), 46 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:00,699 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 226.0) internal successors, (10396), 46 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:00,700 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 194 flow. Second operand 45 states and 2769 transitions. [2023-08-04 04:24:00,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 311 transitions, 1934 flow [2023-08-04 04:24:00,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 311 transitions, 1911 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-04 04:24:00,713 INFO L231 Difference]: Finished difference. Result has 115 places, 172 transitions, 1278 flow [2023-08-04 04:24:00,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1278, PETRI_PLACES=115, PETRI_TRANSITIONS=172} [2023-08-04 04:24:00,715 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 91 predicate places. [2023-08-04 04:24:00,715 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 172 transitions, 1278 flow [2023-08-04 04:24:00,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.166666666666664) internal successors, (1372), 24 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:00,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:00,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:00,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:00,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:00,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1349838642, now seen corresponding path program 1 times [2023-08-04 04:24:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:00,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138512828] [2023-08-04 04:24:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138512828] [2023-08-04 04:24:01,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138512828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:01,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227856904] [2023-08-04 04:24:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:01,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:01,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:24:01,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:24:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:01,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:24:01,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:01,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227856904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:01,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:01,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 04:24:01,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976260698] [2023-08-04 04:24:01,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:24:01,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:24:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:24:01,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 226 [2023-08-04 04:24:01,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 172 transitions, 1278 flow. Second operand has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:01,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:01,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 226 [2023-08-04 04:24:01,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:02,075 INFO L124 PetriNetUnfolderBase]: 424/951 cut-off events. [2023-08-04 04:24:02,075 INFO L125 PetriNetUnfolderBase]: For 7053/7053 co-relation queries the response was YES. [2023-08-04 04:24:02,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 951 events. 424/951 cut-off events. For 7053/7053 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3249 event pairs, 37 based on Foata normal form. 21/972 useless extension candidates. Maximal degree in co-relation 4856. Up to 402 conditions per place. [2023-08-04 04:24:02,086 INFO L140 encePairwiseOnDemand]: 222/226 looper letters, 213 selfloop transitions, 20 changer transitions 4/238 dead transitions. [2023-08-04 04:24:02,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 238 transitions, 2290 flow [2023-08-04 04:24:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-08-04 04:24:02,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029498525073747 [2023-08-04 04:24:02,088 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-08-04 04:24:02,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-08-04 04:24:02,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:02,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-08-04 04:24:02,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,092 INFO L175 Difference]: Start difference. First operand has 115 places, 172 transitions, 1278 flow. Second operand 6 states and 682 transitions. [2023-08-04 04:24:02,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 238 transitions, 2290 flow [2023-08-04 04:24:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 238 transitions, 2024 flow, removed 133 selfloop flow, removed 5 redundant places. [2023-08-04 04:24:02,122 INFO L231 Difference]: Finished difference. Result has 106 places, 150 transitions, 1072 flow [2023-08-04 04:24:02,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=106, PETRI_TRANSITIONS=150} [2023-08-04 04:24:02,123 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 82 predicate places. [2023-08-04 04:24:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 150 transitions, 1072 flow [2023-08-04 04:24:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:02,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:02,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 04:24:02,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:02,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -514717258, now seen corresponding path program 1 times [2023-08-04 04:24:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894782967] [2023-08-04 04:24:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:24:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894782967] [2023-08-04 04:24:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894782967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498086216] [2023-08-04 04:24:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:02,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:02,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:24:02,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 04:24:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:02,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:24:02,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:24:02,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:24:02,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498086216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:02,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:02,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:24:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313182170] [2023-08-04 04:24:02,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:02,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:02,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 226 [2023-08-04 04:24:02,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 150 transitions, 1072 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:02,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 226 [2023-08-04 04:24:02,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:02,805 INFO L124 PetriNetUnfolderBase]: 293/804 cut-off events. [2023-08-04 04:24:02,806 INFO L125 PetriNetUnfolderBase]: For 4464/4464 co-relation queries the response was YES. [2023-08-04 04:24:02,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 804 events. 293/804 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3266 event pairs, 13 based on Foata normal form. 117/921 useless extension candidates. Maximal degree in co-relation 3631. Up to 573 conditions per place. [2023-08-04 04:24:02,812 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 166 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2023-08-04 04:24:02,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 171 transitions, 1633 flow [2023-08-04 04:24:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:24:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:24:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 439 transitions. [2023-08-04 04:24:02,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4856194690265487 [2023-08-04 04:24:02,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 439 transitions. [2023-08-04 04:24:02,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 439 transitions. [2023-08-04 04:24:02,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:02,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 439 transitions. [2023-08-04 04:24:02,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,817 INFO L175 Difference]: Start difference. First operand has 106 places, 150 transitions, 1072 flow. Second operand 4 states and 439 transitions. [2023-08-04 04:24:02,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 171 transitions, 1633 flow [2023-08-04 04:24:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 171 transitions, 1560 flow, removed 14 selfloop flow, removed 14 redundant places. [2023-08-04 04:24:02,833 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 754 flow [2023-08-04 04:24:02,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=754, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2023-08-04 04:24:02,834 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-08-04 04:24:02,834 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 754 flow [2023-08-04 04:24:02,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:02,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:02,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:03,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:03,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:03,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1161825348, now seen corresponding path program 1 times [2023-08-04 04:24:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56331680] [2023-08-04 04:24:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:24:03,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56331680] [2023-08-04 04:24:03,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56331680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:03,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:03,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:03,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641216144] [2023-08-04 04:24:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:03,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:24:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:24:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:24:03,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 226 [2023-08-04 04:24:03,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 754 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:03,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 226 [2023-08-04 04:24:03,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:03,574 INFO L124 PetriNetUnfolderBase]: 234/615 cut-off events. [2023-08-04 04:24:03,574 INFO L125 PetriNetUnfolderBase]: For 4761/4761 co-relation queries the response was YES. [2023-08-04 04:24:03,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 615 events. 234/615 cut-off events. For 4761/4761 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1933 event pairs, 143 based on Foata normal form. 25/640 useless extension candidates. Maximal degree in co-relation 3049. Up to 483 conditions per place. [2023-08-04 04:24:03,580 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 65 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2023-08-04 04:24:03,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 99 transitions, 936 flow [2023-08-04 04:24:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:24:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:24:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-08-04 04:24:03,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446902654867257 [2023-08-04 04:24:03,583 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-08-04 04:24:03,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-08-04 04:24:03,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:03,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-08-04 04:24:03,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,586 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 754 flow. Second operand 4 states and 402 transitions. [2023-08-04 04:24:03,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 99 transitions, 936 flow [2023-08-04 04:24:03,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 99 transitions, 878 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-08-04 04:24:03,599 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 820 flow [2023-08-04 04:24:03,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=820, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-08-04 04:24:03,602 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-08-04 04:24:03,602 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 820 flow [2023-08-04 04:24:03,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:03,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:24:03,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:03,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash -941622567, now seen corresponding path program 1 times [2023-08-04 04:24:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922335213] [2023-08-04 04:24:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 04:24:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:03,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922335213] [2023-08-04 04:24:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922335213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:03,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:24:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186840385] [2023-08-04 04:24:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:03,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:03,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 226 [2023-08-04 04:24:03,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:03,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 226 [2023-08-04 04:24:03,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:03,896 INFO L124 PetriNetUnfolderBase]: 287/749 cut-off events. [2023-08-04 04:24:03,896 INFO L125 PetriNetUnfolderBase]: For 3372/3372 co-relation queries the response was YES. [2023-08-04 04:24:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 749 events. 287/749 cut-off events. For 3372/3372 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2585 event pairs, 133 based on Foata normal form. 9/758 useless extension candidates. Maximal degree in co-relation 3749. Up to 529 conditions per place. [2023-08-04 04:24:03,903 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 128 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2023-08-04 04:24:03,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1420 flow [2023-08-04 04:24:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-04 04:24:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504424778761062 [2023-08-04 04:24:03,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-04 04:24:03,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-04 04:24:03,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:03,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-04 04:24:03,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,908 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 820 flow. Second operand 3 states and 342 transitions. [2023-08-04 04:24:03,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1420 flow [2023-08-04 04:24:03,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1382 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-04 04:24:03,922 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 877 flow [2023-08-04 04:24:03,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=877, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2023-08-04 04:24:03,924 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 69 predicate places. [2023-08-04 04:24:03,924 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 877 flow [2023-08-04 04:24:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:03,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:03,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:24:03,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:03,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash -967520672, now seen corresponding path program 1 times [2023-08-04 04:24:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:03,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885102744] [2023-08-04 04:24:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:24:04,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885102744] [2023-08-04 04:24:04,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885102744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880468115] [2023-08-04 04:24:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:04,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:04,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:24:04,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 04:24:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:04,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-04 04:24:04,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:05,117 INFO L322 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-04 04:24:05,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-04 04:24:05,153 INFO L322 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-04 04:24:05,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-04 04:24:05,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-04 04:24:05,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2023-08-04 04:24:05,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-04 04:24:05,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 65 [2023-08-04 04:24:05,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 04:24:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:05,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:05,496 INFO L322 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-04 04:24:05,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-04 04:24:05,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:05,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-08-04 04:24:05,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:24:05,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:05,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 163 [2023-08-04 04:24:05,667 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:05,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2023-08-04 04:24:05,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:05,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2023-08-04 04:24:05,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:24:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:05,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880468115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:05,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:05,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-04 04:24:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225047274] [2023-08-04 04:24:05,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 04:24:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 04:24:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-08-04 04:24:06,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 226 [2023-08-04 04:24:06,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 877 flow. Second operand has 26 states, 26 states have (on average 85.07692307692308) internal successors, (2212), 26 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:06,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 226 [2023-08-04 04:24:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:09,612 INFO L124 PetriNetUnfolderBase]: 507/1450 cut-off events. [2023-08-04 04:24:09,612 INFO L125 PetriNetUnfolderBase]: For 4653/4653 co-relation queries the response was YES. [2023-08-04 04:24:09,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6991 conditions, 1450 events. 507/1450 cut-off events. For 4653/4653 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5959 event pairs, 6 based on Foata normal form. 40/1490 useless extension candidates. Maximal degree in co-relation 6762. Up to 507 conditions per place. [2023-08-04 04:24:09,622 INFO L140 encePairwiseOnDemand]: 211/226 looper letters, 108 selfloop transitions, 142 changer transitions 238/489 dead transitions. [2023-08-04 04:24:09,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 489 transitions, 5040 flow [2023-08-04 04:24:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-04 04:24:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-04 04:24:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5750 transitions. [2023-08-04 04:24:09,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379738475762779 [2023-08-04 04:24:09,635 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5750 transitions. [2023-08-04 04:24:09,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5750 transitions. [2023-08-04 04:24:09,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:09,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5750 transitions. [2023-08-04 04:24:09,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 85.82089552238806) internal successors, (5750), 67 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:09,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 226.0) internal successors, (15368), 68 states have internal predecessors, (15368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:09,677 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 226.0) internal successors, (15368), 68 states have internal predecessors, (15368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:09,678 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 877 flow. Second operand 67 states and 5750 transitions. [2023-08-04 04:24:09,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 489 transitions, 5040 flow [2023-08-04 04:24:09,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 489 transitions, 5012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:24:09,704 INFO L231 Difference]: Finished difference. Result has 177 places, 167 transitions, 1861 flow [2023-08-04 04:24:09,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1861, PETRI_PLACES=177, PETRI_TRANSITIONS=167} [2023-08-04 04:24:09,705 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 153 predicate places. [2023-08-04 04:24:09,706 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 167 transitions, 1861 flow [2023-08-04 04:24:09,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.07692307692308) internal successors, (2212), 26 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:09,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:09,707 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:09,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:09,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:09,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:09,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1355118001, now seen corresponding path program 1 times [2023-08-04 04:24:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176332234] [2023-08-04 04:24:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-08-04 04:24:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176332234] [2023-08-04 04:24:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176332234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:10,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934226967] [2023-08-04 04:24:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:10,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 226 [2023-08-04 04:24:10,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 167 transitions, 1861 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:10,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 226 [2023-08-04 04:24:10,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:10,327 INFO L124 PetriNetUnfolderBase]: 221/759 cut-off events. [2023-08-04 04:24:10,327 INFO L125 PetriNetUnfolderBase]: For 3968/3968 co-relation queries the response was YES. [2023-08-04 04:24:10,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 759 events. 221/759 cut-off events. For 3968/3968 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2324 event pairs, 148 based on Foata normal form. 12/771 useless extension candidates. Maximal degree in co-relation 4486. Up to 703 conditions per place. [2023-08-04 04:24:10,334 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 130 selfloop transitions, 13 changer transitions 2/146 dead transitions. [2023-08-04 04:24:10,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 146 transitions, 1906 flow [2023-08-04 04:24:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-04 04:24:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823008849557522 [2023-08-04 04:24:10,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-04 04:24:10,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-04 04:24:10,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:10,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-04 04:24:10,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,338 INFO L175 Difference]: Start difference. First operand has 177 places, 167 transitions, 1861 flow. Second operand 3 states and 327 transitions. [2023-08-04 04:24:10,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 146 transitions, 1906 flow [2023-08-04 04:24:10,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 146 transitions, 1510 flow, removed 144 selfloop flow, removed 36 redundant places. [2023-08-04 04:24:10,362 INFO L231 Difference]: Finished difference. Result has 121 places, 143 transitions, 1213 flow [2023-08-04 04:24:10,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1213, PETRI_PLACES=121, PETRI_TRANSITIONS=143} [2023-08-04 04:24:10,364 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 97 predicate places. [2023-08-04 04:24:10,364 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 143 transitions, 1213 flow [2023-08-04 04:24:10,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:10,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:10,364 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:10,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 04:24:10,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:10,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -754047308, now seen corresponding path program 1 times [2023-08-04 04:24:10,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:10,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957720028] [2023-08-04 04:24:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957720028] [2023-08-04 04:24:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957720028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728857337] [2023-08-04 04:24:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:10,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:10,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:24:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 04:24:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:11,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 04:24:11,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 240 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:11,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 240 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728857337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:11,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:11,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-08-04 04:24:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716412209] [2023-08-04 04:24:11,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 04:24:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 04:24:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-08-04 04:24:11,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 226 [2023-08-04 04:24:11,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 143 transitions, 1213 flow. Second operand has 20 states, 20 states have (on average 102.25) internal successors, (2045), 20 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:11,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:11,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 226 [2023-08-04 04:24:11,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:12,095 INFO L124 PetriNetUnfolderBase]: 157/571 cut-off events. [2023-08-04 04:24:12,096 INFO L125 PetriNetUnfolderBase]: For 1215/1215 co-relation queries the response was YES. [2023-08-04 04:24:12,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 571 events. 157/571 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1801 event pairs, 15 based on Foata normal form. 3/574 useless extension candidates. Maximal degree in co-relation 2660. Up to 187 conditions per place. [2023-08-04 04:24:12,099 INFO L140 encePairwiseOnDemand]: 219/226 looper letters, 0 selfloop transitions, 0 changer transitions 185/185 dead transitions. [2023-08-04 04:24:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 185 transitions, 1854 flow [2023-08-04 04:24:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 04:24:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 04:24:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2374 transitions. [2023-08-04 04:24:12,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43768436578171094 [2023-08-04 04:24:12,103 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2374 transitions. [2023-08-04 04:24:12,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2374 transitions. [2023-08-04 04:24:12,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:12,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2374 transitions. [2023-08-04 04:24:12,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.91666666666667) internal successors, (2374), 24 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:12,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:12,114 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 226.0) internal successors, (5650), 25 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:12,114 INFO L175 Difference]: Start difference. First operand has 121 places, 143 transitions, 1213 flow. Second operand 24 states and 2374 transitions. [2023-08-04 04:24:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 185 transitions, 1854 flow [2023-08-04 04:24:12,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 185 transitions, 1659 flow, removed 42 selfloop flow, removed 16 redundant places. [2023-08-04 04:24:12,124 INFO L231 Difference]: Finished difference. Result has 127 places, 0 transitions, 0 flow [2023-08-04 04:24:12,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=127, PETRI_TRANSITIONS=0} [2023-08-04 04:24:12,124 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 103 predicate places. [2023-08-04 04:24:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 0 transitions, 0 flow [2023-08-04 04:24:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 102.25) internal successors, (2045), 20 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:12,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-04 04:24:12,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-04 04:24:12,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:12,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 04:24:12,338 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:12,340 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-04 04:24:12,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,353 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:24:12,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:12,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:24:12,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,355 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:12,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:12,363 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:24:12,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:12,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:24:12,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 04:24:16,875 INFO L134 LiptonReduction]: Checked pairs total: 3056 [2023-08-04 04:24:16,875 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 04:24:16,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:24:16,877 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;@5649230a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:16,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:24:16,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:16,879 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-04 04:24:16,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:16,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:24:16,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:24:16,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -548958516, now seen corresponding path program 1 times [2023-08-04 04:24:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795327497] [2023-08-04 04:24:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:16,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:24:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:16,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:24:16,917 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:24:16,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:24:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 04:24:16,917 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:24:16,918 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:24:16,918 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:24:16,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:24:16,965 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:24:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:16,992 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-04 04:24:16,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:16,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-04 04:24:16,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:16,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:16,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:16,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:16,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:17,016 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-04 04:24:17,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:17,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-04 04:24:17,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 17316 [2023-08-04 04:24:22,016 INFO L134 LiptonReduction]: Checked pairs total: 35420 [2023-08-04 04:24:22,016 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-04 04:24:22,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:24:22,018 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;@5649230a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:22,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:24:22,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:22,023 INFO L124 PetriNetUnfolderBase]: 7/49 cut-off events. [2023-08-04 04:24:22,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:22,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:22,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:22,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:22,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2054394583, now seen corresponding path program 1 times [2023-08-04 04:24:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:22,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645468166] [2023-08-04 04:24:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:22,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645468166] [2023-08-04 04:24:22,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645468166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:22,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:22,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820644562] [2023-08-04 04:24:22,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:24:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:24:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:24:22,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 356 [2023-08-04 04:24:22,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:22,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 356 [2023-08-04 04:24:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:22,589 INFO L124 PetriNetUnfolderBase]: 2758/4630 cut-off events. [2023-08-04 04:24:22,589 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 04:24:22,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 4630 events. 2758/4630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26474 event pairs, 743 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 7963. Up to 3042 conditions per place. [2023-08-04 04:24:22,616 INFO L140 encePairwiseOnDemand]: 342/356 looper letters, 93 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2023-08-04 04:24:22,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 116 transitions, 456 flow [2023-08-04 04:24:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:24:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:24:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-08-04 04:24:22,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168539325842697 [2023-08-04 04:24:22,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-08-04 04:24:22,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-08-04 04:24:22,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:22,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-08-04 04:24:22,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,622 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 920 transitions. [2023-08-04 04:24:22,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 116 transitions, 456 flow [2023-08-04 04:24:22,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 116 transitions, 454 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-04 04:24:22,624 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 204 flow [2023-08-04 04:24:22,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-08-04 04:24:22,625 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-08-04 04:24:22,626 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 204 flow [2023-08-04 04:24:22,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:22,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:24:22,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:22,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -301997448, now seen corresponding path program 1 times [2023-08-04 04:24:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345594233] [2023-08-04 04:24:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:22,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345594233] [2023-08-04 04:24:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345594233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:24:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687787844] [2023-08-04 04:24:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:22,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2023-08-04 04:24:22,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:22,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:22,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2023-08-04 04:24:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:23,214 INFO L124 PetriNetUnfolderBase]: 3515/5831 cut-off events. [2023-08-04 04:24:23,214 INFO L125 PetriNetUnfolderBase]: For 1526/1548 co-relation queries the response was YES. [2023-08-04 04:24:23,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12377 conditions, 5831 events. 3515/5831 cut-off events. For 1526/1548 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 34887 event pairs, 781 based on Foata normal form. 110/4904 useless extension candidates. Maximal degree in co-relation 7401. Up to 4339 conditions per place. [2023-08-04 04:24:23,252 INFO L140 encePairwiseOnDemand]: 351/356 looper letters, 72 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-04 04:24:23,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 435 flow [2023-08-04 04:24:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-08-04 04:24:23,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308988764044944 [2023-08-04 04:24:23,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-08-04 04:24:23,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-08-04 04:24:23,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:23,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-08-04 04:24:23,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,266 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 204 flow. Second operand 3 states and 567 transitions. [2023-08-04 04:24:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 435 flow [2023-08-04 04:24:23,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 435 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:24:23,270 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 225 flow [2023-08-04 04:24:23,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-04 04:24:23,271 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-04 04:24:23,272 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 225 flow [2023-08-04 04:24:23,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:23,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:23,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:24:23,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:23,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:23,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1685742521, now seen corresponding path program 1 times [2023-08-04 04:24:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:23,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538058660] [2023-08-04 04:24:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:23,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538058660] [2023-08-04 04:24:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538058660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997166211] [2023-08-04 04:24:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:23,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:23,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-04 04:24:23,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:23,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:23,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-04 04:24:23,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:24,382 INFO L124 PetriNetUnfolderBase]: 5363/8687 cut-off events. [2023-08-04 04:24:24,382 INFO L125 PetriNetUnfolderBase]: For 2174/2208 co-relation queries the response was YES. [2023-08-04 04:24:24,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18940 conditions, 8687 events. 5363/8687 cut-off events. For 2174/2208 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 52820 event pairs, 1277 based on Foata normal form. 22/7080 useless extension candidates. Maximal degree in co-relation 13490. Up to 4600 conditions per place. [2023-08-04 04:24:24,437 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 144 selfloop transitions, 8 changer transitions 0/169 dead transitions. [2023-08-04 04:24:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 169 transitions, 810 flow [2023-08-04 04:24:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1096 transitions. [2023-08-04 04:24:24,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131086142322098 [2023-08-04 04:24:24,439 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1096 transitions. [2023-08-04 04:24:24,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1096 transitions. [2023-08-04 04:24:24,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:24,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1096 transitions. [2023-08-04 04:24:24,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:24,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:24,444 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:24,444 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 225 flow. Second operand 6 states and 1096 transitions. [2023-08-04 04:24:24,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 169 transitions, 810 flow [2023-08-04 04:24:24,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 169 transitions, 806 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:24,449 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 270 flow [2023-08-04 04:24:24,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-04 04:24:24,449 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-04 04:24:24,449 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 270 flow [2023-08-04 04:24:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:24,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:24,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 04:24:24,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:24,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -374543834, now seen corresponding path program 1 times [2023-08-04 04:24:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762081503] [2023-08-04 04:24:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:24,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:24,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762081503] [2023-08-04 04:24:24,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762081503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:24,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:24,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538201587] [2023-08-04 04:24:24,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-04 04:24:24,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:24,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:24,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-04 04:24:24,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:25,865 INFO L124 PetriNetUnfolderBase]: 8093/12957 cut-off events. [2023-08-04 04:24:25,865 INFO L125 PetriNetUnfolderBase]: For 3736/3766 co-relation queries the response was YES. [2023-08-04 04:24:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29482 conditions, 12957 events. 8093/12957 cut-off events. For 3736/3766 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 81396 event pairs, 1917 based on Foata normal form. 22/10538 useless extension candidates. Maximal degree in co-relation 21584. Up to 7261 conditions per place. [2023-08-04 04:24:25,925 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 156 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2023-08-04 04:24:25,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 183 transitions, 964 flow [2023-08-04 04:24:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1093 transitions. [2023-08-04 04:24:25,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117041198501873 [2023-08-04 04:24:25,928 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1093 transitions. [2023-08-04 04:24:25,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1093 transitions. [2023-08-04 04:24:25,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:25,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1093 transitions. [2023-08-04 04:24:25,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.16666666666666) internal successors, (1093), 6 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,932 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,932 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 270 flow. Second operand 6 states and 1093 transitions. [2023-08-04 04:24:25,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 183 transitions, 964 flow [2023-08-04 04:24:25,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 183 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:24:25,941 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 316 flow [2023-08-04 04:24:25,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2023-08-04 04:24:25,941 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-04 04:24:25,941 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 316 flow [2023-08-04 04:24:25,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:25,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 04:24:25,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:25,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1284036845, now seen corresponding path program 1 times [2023-08-04 04:24:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028938187] [2023-08-04 04:24:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:26,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:26,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028938187] [2023-08-04 04:24:26,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028938187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:26,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:24:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494879590] [2023-08-04 04:24:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:24:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:24:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:24:26,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:24:26,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 143.8) internal successors, (1438), 10 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:26,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:26,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:24:26,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:29,662 INFO L124 PetriNetUnfolderBase]: 15364/24562 cut-off events. [2023-08-04 04:24:29,663 INFO L125 PetriNetUnfolderBase]: For 6462/6488 co-relation queries the response was YES. [2023-08-04 04:24:29,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56784 conditions, 24562 events. 15364/24562 cut-off events. For 6462/6488 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 171752 event pairs, 1952 based on Foata normal form. 26/20277 useless extension candidates. Maximal degree in co-relation 47014. Up to 10090 conditions per place. [2023-08-04 04:24:29,790 INFO L140 encePairwiseOnDemand]: 334/356 looper letters, 342 selfloop transitions, 71 changer transitions 0/430 dead transitions. [2023-08-04 04:24:29,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 430 transitions, 2249 flow [2023-08-04 04:24:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:24:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:24:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2508 transitions. [2023-08-04 04:24:29,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696629213483146 [2023-08-04 04:24:29,794 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2508 transitions. [2023-08-04 04:24:29,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2508 transitions. [2023-08-04 04:24:29,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:29,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2508 transitions. [2023-08-04 04:24:29,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.2) internal successors, (2508), 15 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:29,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:29,804 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:29,804 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 316 flow. Second operand 15 states and 2508 transitions. [2023-08-04 04:24:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 430 transitions, 2249 flow [2023-08-04 04:24:29,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 430 transitions, 2236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:29,828 INFO L231 Difference]: Finished difference. Result has 103 places, 158 transitions, 866 flow [2023-08-04 04:24:29,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=866, PETRI_PLACES=103, PETRI_TRANSITIONS=158} [2023-08-04 04:24:29,828 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2023-08-04 04:24:29,828 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 158 transitions, 866 flow [2023-08-04 04:24:29,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.8) internal successors, (1438), 10 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:29,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:29,829 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, 1, 1, 1] [2023-08-04 04:24:29,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 04:24:29,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:29,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1316323474, now seen corresponding path program 1 times [2023-08-04 04:24:29,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:29,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189670186] [2023-08-04 04:24:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:29,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:30,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189670186] [2023-08-04 04:24:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189670186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:30,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204811104] [2023-08-04 04:24:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:30,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:30,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:24:30,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 04:24:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:30,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-04 04:24:30,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:30,735 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 04:24:30,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 04:24:31,129 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 04:24:31,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-04 04:24:31,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:24:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:31,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:31,386 INFO L322 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-04 04:24:31,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-04 04:24:31,394 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:31,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-04 04:24:31,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-04 04:24:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204811104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:31,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-04 04:24:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576863341] [2023-08-04 04:24:31,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 04:24:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 04:24:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=473, Unknown=6, NotChecked=0, Total=552 [2023-08-04 04:24:32,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 356 [2023-08-04 04:24:32,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 158 transitions, 866 flow. Second operand has 24 states, 24 states have (on average 134.45833333333334) internal successors, (3227), 24 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:32,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:32,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 356 [2023-08-04 04:24:32,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:47,992 INFO L124 PetriNetUnfolderBase]: 57372/92163 cut-off events. [2023-08-04 04:24:47,992 INFO L125 PetriNetUnfolderBase]: For 218310/218364 co-relation queries the response was YES. [2023-08-04 04:24:48,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288303 conditions, 92163 events. 57372/92163 cut-off events. For 218310/218364 co-relation queries the response was YES. Maximal size of possible extension queue 1962. Compared 750886 event pairs, 3786 based on Foata normal form. 1713/88177 useless extension candidates. Maximal degree in co-relation 259758. Up to 13788 conditions per place. [2023-08-04 04:24:48,862 INFO L140 encePairwiseOnDemand]: 312/356 looper letters, 1641 selfloop transitions, 798 changer transitions 0/2456 dead transitions. [2023-08-04 04:24:48,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 2456 transitions, 16695 flow [2023-08-04 04:24:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-04 04:24:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-04 04:24:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 11456 transitions. [2023-08-04 04:24:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469413233458177 [2023-08-04 04:24:48,891 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 11456 transitions. [2023-08-04 04:24:48,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 11456 transitions. [2023-08-04 04:24:48,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:48,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 11456 transitions. [2023-08-04 04:24:48,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 159.11111111111111) internal successors, (11456), 72 states have internal predecessors, (11456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:48,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 356.0) internal successors, (25988), 73 states have internal predecessors, (25988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:48,953 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 356.0) internal successors, (25988), 73 states have internal predecessors, (25988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:48,954 INFO L175 Difference]: Start difference. First operand has 103 places, 158 transitions, 866 flow. Second operand 72 states and 11456 transitions. [2023-08-04 04:24:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 2456 transitions, 16695 flow [2023-08-04 04:24:49,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 2456 transitions, 16673 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:24:49,929 INFO L231 Difference]: Finished difference. Result has 239 places, 1093 transitions, 10018 flow [2023-08-04 04:24:49,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10018, PETRI_PLACES=239, PETRI_TRANSITIONS=1093} [2023-08-04 04:24:49,929 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 182 predicate places. [2023-08-04 04:24:49,929 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 1093 transitions, 10018 flow [2023-08-04 04:24:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 134.45833333333334) internal successors, (3227), 24 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:49,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:49,930 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, 1, 1, 1, 1] [2023-08-04 04:24:49,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 04:24:50,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:50,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:50,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1203665611, now seen corresponding path program 1 times [2023-08-04 04:24:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258102794] [2023-08-04 04:24:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:50,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258102794] [2023-08-04 04:24:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258102794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:50,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:50,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:24:50,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270150208] [2023-08-04 04:24:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:24:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:24:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:24:50,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:24:50,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 1093 transitions, 10018 flow. Second operand has 10 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:50,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:50,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:24:50,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:31,826 INFO L124 PetriNetUnfolderBase]: 93001/149270 cut-off events. [2023-08-04 04:25:31,826 INFO L125 PetriNetUnfolderBase]: For 3929066/3929690 co-relation queries the response was YES. [2023-08-04 04:25:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911621 conditions, 149270 events. 93001/149270 cut-off events. For 3929066/3929690 co-relation queries the response was YES. Maximal size of possible extension queue 3131. Compared 1292233 event pairs, 13982 based on Foata normal form. 1489/141050 useless extension candidates. Maximal degree in co-relation 851805. Up to 80569 conditions per place. [2023-08-04 04:25:34,689 INFO L140 encePairwiseOnDemand]: 334/356 looper letters, 2908 selfloop transitions, 756 changer transitions 0/3688 dead transitions. [2023-08-04 04:25:34,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 3688 transitions, 38372 flow [2023-08-04 04:25:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:25:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:25:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2492 transitions. [2023-08-04 04:25:34,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-04 04:25:34,693 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2492 transitions. [2023-08-04 04:25:34,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2492 transitions. [2023-08-04 04:25:34,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:34,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2492 transitions. [2023-08-04 04:25:34,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.13333333333333) internal successors, (2492), 15 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:34,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:34,700 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:34,701 INFO L175 Difference]: Start difference. First operand has 239 places, 1093 transitions, 10018 flow. Second operand 15 states and 2492 transitions. [2023-08-04 04:25:34,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 3688 transitions, 38372 flow [2023-08-04 04:26:09,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 3688 transitions, 36664 flow, removed 854 selfloop flow, removed 0 redundant places. [2023-08-04 04:26:09,792 INFO L231 Difference]: Finished difference. Result has 262 places, 1899 transitions, 19389 flow [2023-08-04 04:26:09,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19389, PETRI_PLACES=262, PETRI_TRANSITIONS=1899} [2023-08-04 04:26:09,793 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 205 predicate places. [2023-08-04 04:26:09,793 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1899 transitions, 19389 flow [2023-08-04 04:26:09,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:09,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:26:09,794 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, 1, 1, 1, 1, 1] [2023-08-04 04:26:09,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 04:26:09,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:26:09,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:26:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -181397599, now seen corresponding path program 1 times [2023-08-04 04:26:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:26:09,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716403883] [2023-08-04 04:26:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:26:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:26:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:26:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:26:10,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:26:10,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716403883] [2023-08-04 04:26:10,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716403883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:26:10,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:26:10,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-04 04:26:10,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741502432] [2023-08-04 04:26:10,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:26:10,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 04:26:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:26:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 04:26:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-04 04:26:10,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 356 [2023-08-04 04:26:10,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1899 transitions, 19389 flow. Second operand has 11 states, 11 states have (on average 142.9090909090909) internal successors, (1572), 11 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) [2023-08-04 04:26:10,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:26:10,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 356 [2023-08-04 04:26:10,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:27:02,927 INFO L124 PetriNetUnfolderBase]: 91617/147132 cut-off events. [2023-08-04 04:27:02,927 INFO L125 PetriNetUnfolderBase]: For 4407490/4408123 co-relation queries the response was YES. [2023-08-04 04:27:05,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007660 conditions, 147132 events. 91617/147132 cut-off events. For 4407490/4408123 co-relation queries the response was YES. Maximal size of possible extension queue 3079. Compared 1269006 event pairs, 12923 based on Foata normal form. 296/139550 useless extension candidates. Maximal degree in co-relation 932345. Up to 96295 conditions per place. [2023-08-04 04:27:06,251 INFO L140 encePairwiseOnDemand]: 336/356 looper letters, 1817 selfloop transitions, 600 changer transitions 0/2434 dead transitions. [2023-08-04 04:27:06,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 2434 transitions, 31203 flow [2023-08-04 04:27:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:27:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:27:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2488 transitions. [2023-08-04 04:27:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659176029962547 [2023-08-04 04:27:06,254 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2488 transitions. [2023-08-04 04:27:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2488 transitions. [2023-08-04 04:27:06,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:27:06,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2488 transitions. [2023-08-04 04:27:06,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.86666666666667) internal successors, (2488), 15 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:06,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:06,262 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:06,262 INFO L175 Difference]: Start difference. First operand has 262 places, 1899 transitions, 19389 flow. Second operand 15 states and 2488 transitions. [2023-08-04 04:27:06,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 2434 transitions, 31203 flow [2023-08-04 04:28:07,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 2434 transitions, 30519 flow, removed 284 selfloop flow, removed 3 redundant places. [2023-08-04 04:28:07,677 INFO L231 Difference]: Finished difference. Result has 277 places, 1977 transitions, 21599 flow [2023-08-04 04:28:07,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=18895, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=21599, PETRI_PLACES=277, PETRI_TRANSITIONS=1977} [2023-08-04 04:28:07,679 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 220 predicate places. [2023-08-04 04:28:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1977 transitions, 21599 flow [2023-08-04 04:28:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 142.9090909090909) internal successors, (1572), 11 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) [2023-08-04 04:28:07,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:28:07,679 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, 1, 1, 1, 1, 1] [2023-08-04 04:28:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 04:28:07,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:28:07,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:28:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 272896366, now seen corresponding path program 1 times [2023-08-04 04:28:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:28:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878079106] [2023-08-04 04:28:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:28:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:28:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:28:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:28:07,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:28:07,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878079106] [2023-08-04 04:28:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878079106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:28:07,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:28:07,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:28:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63171447] [2023-08-04 04:28:07,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:28:07,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:28:07,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:28:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:28:07,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:28:08,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 356 [2023-08-04 04:28:08,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1977 transitions, 21599 flow. Second operand has 9 states, 9 states have (on average 146.44444444444446) internal successors, (1318), 9 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:28:08,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:28:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 356 [2023-08-04 04:28:08,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand