/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:16:42,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:16:42,092 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 14:16:42,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:16:42,098 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:16:42,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:16:42,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:16:42,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:16:42,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:16:42,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:16:42,133 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:16:42,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:16:42,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:16:42,135 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:16:42,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:16:42,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:16:42,136 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:16:42,136 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:16:42,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:16:42,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:16:42,137 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:16:42,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:16:42,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:16:42,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:16:42,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:16:42,138 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:16:42,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:16:42,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:16:42,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:16:42,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:16:42,140 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:16:42,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:16:42,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:16:42,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:16:42,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:16:42,142 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:16:42,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:16:42,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:16:42,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:16:42,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:16:42,489 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:16:42,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-24 14:16:43,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:16:43,953 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:16:43,953 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-24 14:16:43,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15adc6be1/1aa9edd830164b948fa42ba6da8e6585/FLAG71f0f75a9 [2023-08-24 14:16:43,977 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15adc6be1/1aa9edd830164b948fa42ba6da8e6585 [2023-08-24 14:16:43,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:16:43,983 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:16:43,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:16:43,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:16:43,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:16:43,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:16:43" (1/1) ... [2023-08-24 14:16:43,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7d8a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:43, skipping insertion in model container [2023-08-24 14:16:43,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:16:43" (1/1) ... [2023-08-24 14:16:44,026 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:16:44,219 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c[5426,5439] [2023-08-24 14:16:44,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:16:44,230 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:16:44,266 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c[5426,5439] [2023-08-24 14:16:44,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:16:44,277 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:16:44,277 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:16:44,282 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:16:44,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44 WrapperNode [2023-08-24 14:16:44,283 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:16:44,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:16:44,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:16:44,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:16:44,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,342 INFO L138 Inliner]: procedures = 22, calls = 110, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 265 [2023-08-24 14:16:44,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:16:44,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:16:44,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:16:44,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:16:44,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:16:44,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:16:44,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:16:44,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:16:44,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (1/1) ... [2023-08-24 14:16:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:16:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:16:44,421 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) [2023-08-24 14:16:44,428 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 [2023-08-24 14:16:44,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:16:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:16:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:16:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:16:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:16:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:16:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:16:44,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:16:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:16:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:16:44,455 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:16:44,543 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:16:44,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:16:44,797 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:16:44,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:16:44,938 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 14:16:44,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:16:44 BoogieIcfgContainer [2023-08-24 14:16:44,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:16:44,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:16:44,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:16:44,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:16:44,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:16:43" (1/3) ... [2023-08-24 14:16:44,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23555c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:16:44, skipping insertion in model container [2023-08-24 14:16:44,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:44" (2/3) ... [2023-08-24 14:16:44,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23555c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:16:44, skipping insertion in model container [2023-08-24 14:16:44,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:16:44" (3/3) ... [2023-08-24 14:16:44,948 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-3.wvr.c [2023-08-24 14:16:44,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:16:44,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:16:44,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:16:45,022 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:16:45,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 155 transitions, 334 flow [2023-08-24 14:16:45,128 INFO L124 PetriNetUnfolderBase]: 2/152 cut-off events. [2023-08-24 14:16:45,128 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:16:45,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 2/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-24 14:16:45,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 155 transitions, 334 flow [2023-08-24 14:16:45,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 142 transitions, 302 flow [2023-08-24 14:16:45,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:16:45,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 142 transitions, 302 flow [2023-08-24 14:16:45,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 142 transitions, 302 flow [2023-08-24 14:16:45,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 142 transitions, 302 flow [2023-08-24 14:16:45,181 INFO L124 PetriNetUnfolderBase]: 2/142 cut-off events. [2023-08-24 14:16:45,181 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:16:45,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 2/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-24 14:16:45,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-24 14:16:48,871 INFO L134 LiptonReduction]: Checked pairs total: 20861 [2023-08-24 14:16:48,871 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-24 14:16:48,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:16:48,887 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=false, 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;@400c71ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:16:48,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:16:48,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:16:48,925 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2023-08-24 14:16:48,925 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:16:48,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:48,926 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, 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] [2023-08-24 14:16:48,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:48,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash -685701629, now seen corresponding path program 1 times [2023-08-24 14:16:48,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:48,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749317356] [2023-08-24 14:16:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:49,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:49,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749317356] [2023-08-24 14:16:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749317356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:49,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:16:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323683196] [2023-08-24 14:16:49,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:16:49,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:16:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:16:49,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:16:49,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 116 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:16:49,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:50,972 INFO L124 PetriNetUnfolderBase]: 4666/7168 cut-off events. [2023-08-24 14:16:50,972 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-24 14:16:50,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 7168 events. 4666/7168 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 41262 event pairs, 1653 based on Foata normal form. 1/7108 useless extension candidates. Maximal degree in co-relation 12818. Up to 2475 conditions per place. [2023-08-24 14:16:51,025 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 147 selfloop transitions, 15 changer transitions 19/193 dead transitions. [2023-08-24 14:16:51,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 193 transitions, 820 flow [2023-08-24 14:16:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:16:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:16:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1447 transitions. [2023-08-24 14:16:51,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158645276292335 [2023-08-24 14:16:51,045 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1447 transitions. [2023-08-24 14:16:51,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1447 transitions. [2023-08-24 14:16:51,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:51,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1447 transitions. [2023-08-24 14:16:51,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 131.54545454545453) internal successors, (1447), 11 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:51,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:51,069 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:51,070 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 116 flow. Second operand 11 states and 1447 transitions. [2023-08-24 14:16:51,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 193 transitions, 820 flow [2023-08-24 14:16:51,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 193 transitions, 772 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:16:51,097 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 196 flow [2023-08-24 14:16:51,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=196, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-24 14:16:51,102 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-08-24 14:16:51,102 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 196 flow [2023-08-24 14:16:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:51,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:51,103 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, 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] [2023-08-24 14:16:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:16:51,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:51,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1882952335, now seen corresponding path program 2 times [2023-08-24 14:16:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:51,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258587827] [2023-08-24 14:16:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:51,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258587827] [2023-08-24 14:16:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258587827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:52,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:52,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 14:16:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805638033] [2023-08-24 14:16:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 14:16:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 14:16:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:16:52,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:16:52,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:52,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:52,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:16:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:53,375 INFO L124 PetriNetUnfolderBase]: 6229/10706 cut-off events. [2023-08-24 14:16:53,376 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-24 14:16:53,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21707 conditions, 10706 events. 6229/10706 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 74998 event pairs, 2431 based on Foata normal form. 112/10587 useless extension candidates. Maximal degree in co-relation 21685. Up to 6828 conditions per place. [2023-08-24 14:16:53,443 INFO L140 encePairwiseOnDemand]: 244/255 looper letters, 119 selfloop transitions, 22 changer transitions 0/169 dead transitions. [2023-08-24 14:16:53,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 169 transitions, 696 flow [2023-08-24 14:16:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:16:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:16:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1178 transitions. [2023-08-24 14:16:53,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132897603485839 [2023-08-24 14:16:53,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1178 transitions. [2023-08-24 14:16:53,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1178 transitions. [2023-08-24 14:16:53,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:53,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1178 transitions. [2023-08-24 14:16:53,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.88888888888889) internal successors, (1178), 9 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:53,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:53,456 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:53,456 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 196 flow. Second operand 9 states and 1178 transitions. [2023-08-24 14:16:53,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 169 transitions, 696 flow [2023-08-24 14:16:53,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 169 transitions, 694 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:16:53,468 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 338 flow [2023-08-24 14:16:53,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-08-24 14:16:53,469 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 17 predicate places. [2023-08-24 14:16:53,470 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 338 flow [2023-08-24 14:16:53,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:53,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:53,474 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, 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] [2023-08-24 14:16:53,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:16:53,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:53,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash 743130011, now seen corresponding path program 3 times [2023-08-24 14:16:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193110110] [2023-08-24 14:16:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:53,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:53,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193110110] [2023-08-24 14:16:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193110110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:53,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:53,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:16:53,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127740426] [2023-08-24 14:16:53,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:16:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:16:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:16:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 255 [2023-08-24 14:16:53,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:53,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:53,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 255 [2023-08-24 14:16:53,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:54,331 INFO L124 PetriNetUnfolderBase]: 4470/8044 cut-off events. [2023-08-24 14:16:54,331 INFO L125 PetriNetUnfolderBase]: For 2236/2348 co-relation queries the response was YES. [2023-08-24 14:16:54,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18789 conditions, 8044 events. 4470/8044 cut-off events. For 2236/2348 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 58832 event pairs, 2793 based on Foata normal form. 214/7873 useless extension candidates. Maximal degree in co-relation 12942. Up to 5240 conditions per place. [2023-08-24 14:16:54,388 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 69 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-24 14:16:54,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 555 flow [2023-08-24 14:16:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:16:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:16:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-24 14:16:54,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594771241830065 [2023-08-24 14:16:54,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-24 14:16:54,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-24 14:16:54,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:54,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-24 14:16:54,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:54,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:54,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:54,393 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 338 flow. Second operand 3 states and 428 transitions. [2023-08-24 14:16:54,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 555 flow [2023-08-24 14:16:54,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 551 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 14:16:54,412 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 346 flow [2023-08-24 14:16:54,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-08-24 14:16:54,414 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-08-24 14:16:54,417 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 346 flow [2023-08-24 14:16:54,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:54,417 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, 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] [2023-08-24 14:16:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:16:54,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:54,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -567865169, now seen corresponding path program 4 times [2023-08-24 14:16:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424352361] [2023-08-24 14:16:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424352361] [2023-08-24 14:16:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424352361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:54,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:54,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:16:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343268258] [2023-08-24 14:16:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:54,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:16:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:54,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:16:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:16:54,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:16:54,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:54,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:54,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:16:54,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:56,326 INFO L124 PetriNetUnfolderBase]: 9297/14702 cut-off events. [2023-08-24 14:16:56,326 INFO L125 PetriNetUnfolderBase]: For 4605/4827 co-relation queries the response was YES. [2023-08-24 14:16:56,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37705 conditions, 14702 events. 9297/14702 cut-off events. For 4605/4827 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 96346 event pairs, 3463 based on Foata normal form. 149/14572 useless extension candidates. Maximal degree in co-relation 20049. Up to 3840 conditions per place. [2023-08-24 14:16:56,425 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 213 selfloop transitions, 29 changer transitions 38/301 dead transitions. [2023-08-24 14:16:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 301 transitions, 1625 flow [2023-08-24 14:16:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:16:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:16:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1463 transitions. [2023-08-24 14:16:56,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215686274509804 [2023-08-24 14:16:56,430 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1463 transitions. [2023-08-24 14:16:56,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1463 transitions. [2023-08-24 14:16:56,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:56,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1463 transitions. [2023-08-24 14:16:56,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 133.0) internal successors, (1463), 11 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:56,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:56,438 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:56,438 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 346 flow. Second operand 11 states and 1463 transitions. [2023-08-24 14:16:56,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 301 transitions, 1625 flow [2023-08-24 14:16:56,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 301 transitions, 1621 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:16:56,459 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 583 flow [2023-08-24 14:16:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=583, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2023-08-24 14:16:56,461 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-08-24 14:16:56,461 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 583 flow [2023-08-24 14:16:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:56,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:56,462 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, 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] [2023-08-24 14:16:56,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:16:56,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:56,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash 734314481, now seen corresponding path program 5 times [2023-08-24 14:16:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:56,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987644080] [2023-08-24 14:16:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:56,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:57,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:57,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987644080] [2023-08-24 14:16:57,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987644080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:57,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:57,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:16:57,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788795362] [2023-08-24 14:16:57,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:57,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:16:57,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:16:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:16:57,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:16:57,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:57,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:57,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:16:57,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:58,705 INFO L124 PetriNetUnfolderBase]: 10143/17806 cut-off events. [2023-08-24 14:16:58,705 INFO L125 PetriNetUnfolderBase]: For 6335/6856 co-relation queries the response was YES. [2023-08-24 14:16:58,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44243 conditions, 17806 events. 10143/17806 cut-off events. For 6335/6856 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 136361 event pairs, 1429 based on Foata normal form. 192/17629 useless extension candidates. Maximal degree in co-relation 44080. Up to 8077 conditions per place. [2023-08-24 14:16:58,833 INFO L140 encePairwiseOnDemand]: 243/255 looper letters, 182 selfloop transitions, 36 changer transitions 4/275 dead transitions. [2023-08-24 14:16:58,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 275 transitions, 1487 flow [2023-08-24 14:16:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:16:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:16:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1457 transitions. [2023-08-24 14:16:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194295900178253 [2023-08-24 14:16:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1457 transitions. [2023-08-24 14:16:58,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1457 transitions. [2023-08-24 14:16:58,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:58,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1457 transitions. [2023-08-24 14:16:58,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.45454545454547) internal successors, (1457), 11 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:58,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:58,847 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:58,847 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 583 flow. Second operand 11 states and 1457 transitions. [2023-08-24 14:16:58,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 275 transitions, 1487 flow [2023-08-24 14:16:58,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 275 transitions, 1477 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 14:16:58,906 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 852 flow [2023-08-24 14:16:58,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=852, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2023-08-24 14:16:58,908 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 48 predicate places. [2023-08-24 14:16:58,908 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 852 flow [2023-08-24 14:16:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:58,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:58,909 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, 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] [2023-08-24 14:16:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:16:58,909 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:16:58,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 205183307, now seen corresponding path program 6 times [2023-08-24 14:16:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743762050] [2023-08-24 14:16:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:59,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743762050] [2023-08-24 14:16:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743762050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:59,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:59,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:16:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920226339] [2023-08-24 14:16:59,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:59,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:16:59,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:16:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:16:59,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 255 [2023-08-24 14:16:59,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 852 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:59,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:59,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 255 [2023-08-24 14:16:59,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:00,917 INFO L124 PetriNetUnfolderBase]: 8441/15811 cut-off events. [2023-08-24 14:17:00,917 INFO L125 PetriNetUnfolderBase]: For 17320/18750 co-relation queries the response was YES. [2023-08-24 14:17:00,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45533 conditions, 15811 events. 8441/15811 cut-off events. For 17320/18750 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 129500 event pairs, 5050 based on Foata normal form. 483/15664 useless extension candidates. Maximal degree in co-relation 43977. Up to 10075 conditions per place. [2023-08-24 14:17:01,028 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 93 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2023-08-24 14:17:01,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 178 transitions, 1221 flow [2023-08-24 14:17:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:17:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:17:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-24 14:17:01,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594771241830065 [2023-08-24 14:17:01,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-24 14:17:01,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-24 14:17:01,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:01,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-24 14:17:01,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:01,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:01,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:01,034 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 852 flow. Second operand 3 states and 428 transitions. [2023-08-24 14:17:01,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 178 transitions, 1221 flow [2023-08-24 14:17:01,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 178 transitions, 1197 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-08-24 14:17:01,209 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 842 flow [2023-08-24 14:17:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=842, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2023-08-24 14:17:01,212 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2023-08-24 14:17:01,212 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 842 flow [2023-08-24 14:17:01,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:01,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:01,212 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, 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] [2023-08-24 14:17:01,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:17:01,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:01,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:01,214 INFO L85 PathProgramCache]: Analyzing trace with hash 173477283, now seen corresponding path program 7 times [2023-08-24 14:17:01,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366149624] [2023-08-24 14:17:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366149624] [2023-08-24 14:17:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366149624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:01,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 14:17:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270588393] [2023-08-24 14:17:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:17:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:17:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:17:01,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:01,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 842 flow. Second operand has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:01,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:01,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:05,818 INFO L124 PetriNetUnfolderBase]: 24480/43657 cut-off events. [2023-08-24 14:17:05,818 INFO L125 PetriNetUnfolderBase]: For 49063/50747 co-relation queries the response was YES. [2023-08-24 14:17:06,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128790 conditions, 43657 events. 24480/43657 cut-off events. For 49063/50747 co-relation queries the response was YES. Maximal size of possible extension queue 1378. Compared 394513 event pairs, 3473 based on Foata normal form. 645/43484 useless extension candidates. Maximal degree in co-relation 125263. Up to 13330 conditions per place. [2023-08-24 14:17:06,296 INFO L140 encePairwiseOnDemand]: 240/255 looper letters, 264 selfloop transitions, 91 changer transitions 3/411 dead transitions. [2023-08-24 14:17:06,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 411 transitions, 2668 flow [2023-08-24 14:17:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 14:17:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 14:17:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1765 transitions. [2023-08-24 14:17:06,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324283559577677 [2023-08-24 14:17:06,303 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1765 transitions. [2023-08-24 14:17:06,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1765 transitions. [2023-08-24 14:17:06,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:06,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1765 transitions. [2023-08-24 14:17:06,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 135.76923076923077) internal successors, (1765), 13 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:06,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:06,313 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:06,313 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 842 flow. Second operand 13 states and 1765 transitions. [2023-08-24 14:17:06,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 411 transitions, 2668 flow [2023-08-24 14:17:06,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 411 transitions, 2664 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:17:06,976 INFO L231 Difference]: Finished difference. Result has 131 places, 218 transitions, 1638 flow [2023-08-24 14:17:06,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1638, PETRI_PLACES=131, PETRI_TRANSITIONS=218} [2023-08-24 14:17:06,977 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 72 predicate places. [2023-08-24 14:17:06,977 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 218 transitions, 1638 flow [2023-08-24 14:17:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:06,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:06,978 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, 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] [2023-08-24 14:17:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:17:06,978 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:06,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1900573463, now seen corresponding path program 8 times [2023-08-24 14:17:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:06,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275195666] [2023-08-24 14:17:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:07,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275195666] [2023-08-24 14:17:07,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275195666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:07,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:07,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:17:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722268548] [2023-08-24 14:17:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:07,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:17:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:17:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:17:07,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:07,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 218 transitions, 1638 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:07,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:07,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:07,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:13,761 INFO L124 PetriNetUnfolderBase]: 39307/61011 cut-off events. [2023-08-24 14:17:13,761 INFO L125 PetriNetUnfolderBase]: For 160900/163647 co-relation queries the response was YES. [2023-08-24 14:17:14,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227422 conditions, 61011 events. 39307/61011 cut-off events. For 160900/163647 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 463066 event pairs, 14218 based on Foata normal form. 1619/61581 useless extension candidates. Maximal degree in co-relation 218776. Up to 20286 conditions per place. [2023-08-24 14:17:14,373 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 427 selfloop transitions, 35 changer transitions 42/569 dead transitions. [2023-08-24 14:17:14,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 569 transitions, 5030 flow [2023-08-24 14:17:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:17:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:17:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1459 transitions. [2023-08-24 14:17:14,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201426024955437 [2023-08-24 14:17:14,378 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1459 transitions. [2023-08-24 14:17:14,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1459 transitions. [2023-08-24 14:17:14,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:14,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1459 transitions. [2023-08-24 14:17:14,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:14,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:14,390 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:14,390 INFO L175 Difference]: Start difference. First operand has 131 places, 218 transitions, 1638 flow. Second operand 11 states and 1459 transitions. [2023-08-24 14:17:14,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 569 transitions, 5030 flow [2023-08-24 14:17:16,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 569 transitions, 4860 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-08-24 14:17:16,679 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 1819 flow [2023-08-24 14:17:16,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1819, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2023-08-24 14:17:16,679 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 88 predicate places. [2023-08-24 14:17:16,680 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 1819 flow [2023-08-24 14:17:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:16,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:16,680 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, 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] [2023-08-24 14:17:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 14:17:16,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:16,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -580566889, now seen corresponding path program 9 times [2023-08-24 14:17:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578047095] [2023-08-24 14:17:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:16,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:16,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578047095] [2023-08-24 14:17:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578047095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:16,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:17:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970402882] [2023-08-24 14:17:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:17:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:17:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:17:16,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 255 [2023-08-24 14:17:16,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 1819 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:16,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 255 [2023-08-24 14:17:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:20,655 INFO L124 PetriNetUnfolderBase]: 19506/36742 cut-off events. [2023-08-24 14:17:20,655 INFO L125 PetriNetUnfolderBase]: For 101031/103969 co-relation queries the response was YES. [2023-08-24 14:17:20,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136082 conditions, 36742 events. 19506/36742 cut-off events. For 101031/103969 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 340144 event pairs, 11669 based on Foata normal form. 1072/36033 useless extension candidates. Maximal degree in co-relation 135830. Up to 26327 conditions per place. [2023-08-24 14:17:20,983 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 140 selfloop transitions, 2 changer transitions 0/268 dead transitions. [2023-08-24 14:17:20,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 268 transitions, 2330 flow [2023-08-24 14:17:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:17:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:17:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-24 14:17:20,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594771241830065 [2023-08-24 14:17:20,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-24 14:17:20,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-24 14:17:20,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:20,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-24 14:17:20,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:20,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:20,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:20,989 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 1819 flow. Second operand 3 states and 428 transitions. [2023-08-24 14:17:20,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 268 transitions, 2330 flow [2023-08-24 14:17:22,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 268 transitions, 2279 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-24 14:17:22,182 INFO L231 Difference]: Finished difference. Result has 142 places, 226 transitions, 1721 flow [2023-08-24 14:17:22,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1721, PETRI_PLACES=142, PETRI_TRANSITIONS=226} [2023-08-24 14:17:22,183 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 83 predicate places. [2023-08-24 14:17:22,183 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 226 transitions, 1721 flow [2023-08-24 14:17:22,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:22,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:22,183 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, 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] [2023-08-24 14:17:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 14:17:22,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:22,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -897394273, now seen corresponding path program 10 times [2023-08-24 14:17:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:22,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576646645] [2023-08-24 14:17:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576646645] [2023-08-24 14:17:22,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576646645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:22,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:22,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 14:17:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326728824] [2023-08-24 14:17:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:17:22,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:17:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:17:22,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:22,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 226 transitions, 1721 flow. Second operand has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:22,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:22,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:22,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:27,316 INFO L124 PetriNetUnfolderBase]: 23118/41665 cut-off events. [2023-08-24 14:17:27,316 INFO L125 PetriNetUnfolderBase]: For 101937/104570 co-relation queries the response was YES. [2023-08-24 14:17:27,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150460 conditions, 41665 events. 23118/41665 cut-off events. For 101937/104570 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 369564 event pairs, 8420 based on Foata normal form. 258/41146 useless extension candidates. Maximal degree in co-relation 145509. Up to 25051 conditions per place. [2023-08-24 14:17:27,664 INFO L140 encePairwiseOnDemand]: 243/255 looper letters, 280 selfloop transitions, 82 changer transitions 1/433 dead transitions. [2023-08-24 14:17:27,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 433 transitions, 3746 flow [2023-08-24 14:17:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:17:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:17:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1196 transitions. [2023-08-24 14:17:27,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211328976034858 [2023-08-24 14:17:27,668 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1196 transitions. [2023-08-24 14:17:27,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1196 transitions. [2023-08-24 14:17:27,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:27,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1196 transitions. [2023-08-24 14:17:27,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.88888888888889) internal successors, (1196), 9 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:27,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:27,674 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:27,674 INFO L175 Difference]: Start difference. First operand has 142 places, 226 transitions, 1721 flow. Second operand 9 states and 1196 transitions. [2023-08-24 14:17:27,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 433 transitions, 3746 flow [2023-08-24 14:17:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 433 transitions, 3742 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:17:29,019 INFO L231 Difference]: Finished difference. Result has 155 places, 289 transitions, 2631 flow [2023-08-24 14:17:29,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2631, PETRI_PLACES=155, PETRI_TRANSITIONS=289} [2023-08-24 14:17:29,024 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 96 predicate places. [2023-08-24 14:17:29,025 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 289 transitions, 2631 flow [2023-08-24 14:17:29,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:29,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:29,026 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, 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] [2023-08-24 14:17:29,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 14:17:29,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:29,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1170691909, now seen corresponding path program 11 times [2023-08-24 14:17:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:29,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852677337] [2023-08-24 14:17:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:29,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:29,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:29,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852677337] [2023-08-24 14:17:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852677337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:29,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:29,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:17:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861486032] [2023-08-24 14:17:29,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:29,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:17:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:17:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:17:29,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 289 transitions, 2631 flow. Second operand has 6 states, 6 states have (on average 121.16666666666667) internal successors, (727), 6 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:35,209 INFO L124 PetriNetUnfolderBase]: 24719/44865 cut-off events. [2023-08-24 14:17:35,209 INFO L125 PetriNetUnfolderBase]: For 176909/180552 co-relation queries the response was YES. [2023-08-24 14:17:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178002 conditions, 44865 events. 24719/44865 cut-off events. For 176909/180552 co-relation queries the response was YES. Maximal size of possible extension queue 1355. Compared 407220 event pairs, 9391 based on Foata normal form. 714/44657 useless extension candidates. Maximal degree in co-relation 171762. Up to 33798 conditions per place. [2023-08-24 14:17:35,690 INFO L140 encePairwiseOnDemand]: 245/255 looper letters, 291 selfloop transitions, 60 changer transitions 4/425 dead transitions. [2023-08-24 14:17:35,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 425 transitions, 4446 flow [2023-08-24 14:17:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:17:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:17:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 802 transitions. [2023-08-24 14:17:35,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241830065359477 [2023-08-24 14:17:35,693 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 802 transitions. [2023-08-24 14:17:35,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 802 transitions. [2023-08-24 14:17:35,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:35,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 802 transitions. [2023-08-24 14:17:35,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.66666666666666) internal successors, (802), 6 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:35,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 255.0) internal successors, (1785), 7 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:35,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 255.0) internal successors, (1785), 7 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:35,698 INFO L175 Difference]: Start difference. First operand has 155 places, 289 transitions, 2631 flow. Second operand 6 states and 802 transitions. [2023-08-24 14:17:35,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 425 transitions, 4446 flow [2023-08-24 14:17:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 425 transitions, 4312 flow, removed 67 selfloop flow, removed 0 redundant places. [2023-08-24 14:17:37,931 INFO L231 Difference]: Finished difference. Result has 164 places, 336 transitions, 3287 flow [2023-08-24 14:17:37,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3287, PETRI_PLACES=164, PETRI_TRANSITIONS=336} [2023-08-24 14:17:37,932 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 105 predicate places. [2023-08-24 14:17:37,932 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 336 transitions, 3287 flow [2023-08-24 14:17:37,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.16666666666667) internal successors, (727), 6 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:37,945 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, 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] [2023-08-24 14:17:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 14:17:37,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:37,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1768502439, now seen corresponding path program 12 times [2023-08-24 14:17:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194875867] [2023-08-24 14:17:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:38,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194875867] [2023-08-24 14:17:38,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194875867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:38,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:38,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:17:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516276197] [2023-08-24 14:17:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:38,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:17:38,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:38,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:17:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:17:38,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:38,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 336 transitions, 3287 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:38,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:38,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:38,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:46,579 INFO L124 PetriNetUnfolderBase]: 39423/62585 cut-off events. [2023-08-24 14:17:46,579 INFO L125 PetriNetUnfolderBase]: For 262152/265297 co-relation queries the response was YES. [2023-08-24 14:17:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260106 conditions, 62585 events. 39423/62585 cut-off events. For 262152/265297 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 490972 event pairs, 14212 based on Foata normal form. 1628/63291 useless extension candidates. Maximal degree in co-relation 249717. Up to 18840 conditions per place. [2023-08-24 14:17:47,523 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 577 selfloop transitions, 37 changer transitions 79/781 dead transitions. [2023-08-24 14:17:47,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 781 transitions, 8839 flow [2023-08-24 14:17:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:17:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:17:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1459 transitions. [2023-08-24 14:17:47,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201426024955437 [2023-08-24 14:17:47,528 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1459 transitions. [2023-08-24 14:17:47,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1459 transitions. [2023-08-24 14:17:47,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:47,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1459 transitions. [2023-08-24 14:17:47,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:47,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:47,536 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:47,536 INFO L175 Difference]: Start difference. First operand has 164 places, 336 transitions, 3287 flow. Second operand 11 states and 1459 transitions. [2023-08-24 14:17:47,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 781 transitions, 8839 flow [2023-08-24 14:17:51,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 781 transitions, 8757 flow, removed 41 selfloop flow, removed 0 redundant places. [2023-08-24 14:17:51,755 INFO L231 Difference]: Finished difference. Result has 178 places, 339 transitions, 3371 flow [2023-08-24 14:17:51,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3371, PETRI_PLACES=178, PETRI_TRANSITIONS=339} [2023-08-24 14:17:51,756 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 119 predicate places. [2023-08-24 14:17:51,757 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 339 transitions, 3371 flow [2023-08-24 14:17:51,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:51,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:17:51,757 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, 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] [2023-08-24 14:17:51,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 14:17:51,757 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:17:51,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:17:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 619820233, now seen corresponding path program 13 times [2023-08-24 14:17:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:17:51,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741809126] [2023-08-24 14:17:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:17:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:17:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:17:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:17:52,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:17:52,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741809126] [2023-08-24 14:17:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741809126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:17:52,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:17:52,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 14:17:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042052099] [2023-08-24 14:17:52,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:17:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 14:17:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:17:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 14:17:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:17:52,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:17:52,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 339 transitions, 3371 flow. Second operand has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:52,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:17:52,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:17:52,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:17:58,563 INFO L124 PetriNetUnfolderBase]: 26188/47572 cut-off events. [2023-08-24 14:17:58,563 INFO L125 PetriNetUnfolderBase]: For 214884/218406 co-relation queries the response was YES. [2023-08-24 14:17:59,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197724 conditions, 47572 events. 26188/47572 cut-off events. For 214884/218406 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 435992 event pairs, 10118 based on Foata normal form. 469/47058 useless extension candidates. Maximal degree in co-relation 197457. Up to 36858 conditions per place. [2023-08-24 14:17:59,416 INFO L140 encePairwiseOnDemand]: 244/255 looper letters, 326 selfloop transitions, 64 changer transitions 21/485 dead transitions. [2023-08-24 14:17:59,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 485 transitions, 5250 flow [2023-08-24 14:17:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 14:17:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 14:17:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1299 transitions. [2023-08-24 14:17:59,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094117647058823 [2023-08-24 14:17:59,421 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1299 transitions. [2023-08-24 14:17:59,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1299 transitions. [2023-08-24 14:17:59,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:17:59,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1299 transitions. [2023-08-24 14:17:59,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 129.9) internal successors, (1299), 10 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:59,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:59,427 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:17:59,427 INFO L175 Difference]: Start difference. First operand has 178 places, 339 transitions, 3371 flow. Second operand 10 states and 1299 transitions. [2023-08-24 14:17:59,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 485 transitions, 5250 flow [2023-08-24 14:18:02,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 485 transitions, 5206 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-24 14:18:02,205 INFO L231 Difference]: Finished difference. Result has 188 places, 373 transitions, 3940 flow [2023-08-24 14:18:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3940, PETRI_PLACES=188, PETRI_TRANSITIONS=373} [2023-08-24 14:18:02,206 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 129 predicate places. [2023-08-24 14:18:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 373 transitions, 3940 flow [2023-08-24 14:18:02,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:18:02,207 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, 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] [2023-08-24 14:18:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 14:18:02,207 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:18:02,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:18:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -320011493, now seen corresponding path program 14 times [2023-08-24 14:18:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:18:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053918924] [2023-08-24 14:18:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:18:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:18:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:18:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:18:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:18:02,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053918924] [2023-08-24 14:18:02,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053918924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:18:02,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:18:02,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-24 14:18:02,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313399386] [2023-08-24 14:18:02,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:18:02,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 14:18:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:18:02,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 14:18:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:18:02,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:18:02,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 373 transitions, 3940 flow. Second operand has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:02,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:18:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:18:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:18:15,981 INFO L124 PetriNetUnfolderBase]: 49622/91301 cut-off events. [2023-08-24 14:18:15,981 INFO L125 PetriNetUnfolderBase]: For 479383/486124 co-relation queries the response was YES. [2023-08-24 14:18:17,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394699 conditions, 91301 events. 49622/91301 cut-off events. For 479383/486124 co-relation queries the response was YES. Maximal size of possible extension queue 3294. Compared 936208 event pairs, 13180 based on Foata normal form. 2193/91784 useless extension candidates. Maximal degree in co-relation 385877. Up to 35415 conditions per place. [2023-08-24 14:18:17,352 INFO L140 encePairwiseOnDemand]: 238/255 looper letters, 467 selfloop transitions, 257 changer transitions 6/804 dead transitions. [2023-08-24 14:18:17,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 804 transitions, 9114 flow [2023-08-24 14:18:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 14:18:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 14:18:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1865 transitions. [2023-08-24 14:18:17,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224089635854342 [2023-08-24 14:18:17,355 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1865 transitions. [2023-08-24 14:18:17,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1865 transitions. [2023-08-24 14:18:17,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:18:17,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1865 transitions. [2023-08-24 14:18:17,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 133.21428571428572) internal successors, (1865), 14 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:17,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 255.0) internal successors, (3825), 15 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:17,365 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 255.0) internal successors, (3825), 15 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:17,365 INFO L175 Difference]: Start difference. First operand has 188 places, 373 transitions, 3940 flow. Second operand 14 states and 1865 transitions. [2023-08-24 14:18:17,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 804 transitions, 9114 flow [2023-08-24 14:18:28,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 804 transitions, 9018 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-08-24 14:18:28,226 INFO L231 Difference]: Finished difference. Result has 211 places, 571 transitions, 7259 flow [2023-08-24 14:18:28,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7259, PETRI_PLACES=211, PETRI_TRANSITIONS=571} [2023-08-24 14:18:28,227 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 152 predicate places. [2023-08-24 14:18:28,227 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 571 transitions, 7259 flow [2023-08-24 14:18:28,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:18:28,227 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, 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] [2023-08-24 14:18:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 14:18:28,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:18:28,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:18:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1935659655, now seen corresponding path program 15 times [2023-08-24 14:18:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:18:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559077541] [2023-08-24 14:18:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:18:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:18:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:18:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:18:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:18:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559077541] [2023-08-24 14:18:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559077541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:18:28,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:18:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:18:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672759231] [2023-08-24 14:18:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:18:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:18:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:18:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:18:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:18:28,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:18:28,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 571 transitions, 7259 flow. Second operand has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:28,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:18:28,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:18:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:18:44,189 INFO L124 PetriNetUnfolderBase]: 48717/91182 cut-off events. [2023-08-24 14:18:44,189 INFO L125 PetriNetUnfolderBase]: For 784765/795964 co-relation queries the response was YES. [2023-08-24 14:18:45,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450512 conditions, 91182 events. 48717/91182 cut-off events. For 784765/795964 co-relation queries the response was YES. Maximal size of possible extension queue 3298. Compared 951691 event pairs, 19006 based on Foata normal form. 2279/91681 useless extension candidates. Maximal degree in co-relation 440777. Up to 66671 conditions per place. [2023-08-24 14:18:45,663 INFO L140 encePairwiseOnDemand]: 246/255 looper letters, 504 selfloop transitions, 80 changer transitions 7/665 dead transitions. [2023-08-24 14:18:45,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 665 transitions, 9412 flow [2023-08-24 14:18:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:18:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:18:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1034 transitions. [2023-08-24 14:18:45,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068627450980392 [2023-08-24 14:18:45,665 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1034 transitions. [2023-08-24 14:18:45,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1034 transitions. [2023-08-24 14:18:45,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:18:45,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1034 transitions. [2023-08-24 14:18:45,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.25) internal successors, (1034), 8 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:45,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:45,670 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:18:45,670 INFO L175 Difference]: Start difference. First operand has 211 places, 571 transitions, 7259 flow. Second operand 8 states and 1034 transitions. [2023-08-24 14:18:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 665 transitions, 9412 flow [2023-08-24 14:19:02,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 665 transitions, 9053 flow, removed 175 selfloop flow, removed 1 redundant places. [2023-08-24 14:19:02,681 INFO L231 Difference]: Finished difference. Result has 221 places, 578 transitions, 7410 flow [2023-08-24 14:19:02,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=6676, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7410, PETRI_PLACES=221, PETRI_TRANSITIONS=578} [2023-08-24 14:19:02,682 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 162 predicate places. [2023-08-24 14:19:02,682 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 578 transitions, 7410 flow [2023-08-24 14:19:02,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:02,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:19:02,683 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, 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] [2023-08-24 14:19:02,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 14:19:02,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:19:02,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:19:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash -846901715, now seen corresponding path program 16 times [2023-08-24 14:19:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:19:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813280982] [2023-08-24 14:19:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:19:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:19:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:19:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:19:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:19:03,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813280982] [2023-08-24 14:19:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813280982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:19:03,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:19:03,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 14:19:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178815257] [2023-08-24 14:19:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:19:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:19:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:19:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:19:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:19:03,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:19:03,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 578 transitions, 7410 flow. Second operand has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:03,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:19:03,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:19:03,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:19:21,669 INFO L124 PetriNetUnfolderBase]: 49496/92810 cut-off events. [2023-08-24 14:19:21,669 INFO L125 PetriNetUnfolderBase]: For 800378/812002 co-relation queries the response was YES. [2023-08-24 14:19:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459104 conditions, 92810 events. 49496/92810 cut-off events. For 800378/812002 co-relation queries the response was YES. Maximal size of possible extension queue 3338. Compared 972812 event pairs, 19469 based on Foata normal form. 1751/92809 useless extension candidates. Maximal degree in co-relation 449205. Up to 70408 conditions per place. [2023-08-24 14:19:23,366 INFO L140 encePairwiseOnDemand]: 245/255 looper letters, 527 selfloop transitions, 48 changer transitions 30/679 dead transitions. [2023-08-24 14:19:23,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 679 transitions, 9376 flow [2023-08-24 14:19:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:19:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:19:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1173 transitions. [2023-08-24 14:19:23,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-24 14:19:23,368 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1173 transitions. [2023-08-24 14:19:23,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1173 transitions. [2023-08-24 14:19:23,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:19:23,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1173 transitions. [2023-08-24 14:19:23,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.33333333333334) internal successors, (1173), 9 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:23,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:23,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:23,377 INFO L175 Difference]: Start difference. First operand has 221 places, 578 transitions, 7410 flow. Second operand 9 states and 1173 transitions. [2023-08-24 14:19:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 679 transitions, 9376 flow [2023-08-24 14:19:40,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 679 transitions, 9214 flow, removed 61 selfloop flow, removed 2 redundant places. [2023-08-24 14:19:40,357 INFO L231 Difference]: Finished difference. Result has 231 places, 579 transitions, 7384 flow [2023-08-24 14:19:40,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7384, PETRI_PLACES=231, PETRI_TRANSITIONS=579} [2023-08-24 14:19:40,358 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 172 predicate places. [2023-08-24 14:19:40,358 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 579 transitions, 7384 flow [2023-08-24 14:19:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:19:40,359 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, 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] [2023-08-24 14:19:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 14:19:40,359 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:19:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:19:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1172605781, now seen corresponding path program 17 times [2023-08-24 14:19:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:19:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144481791] [2023-08-24 14:19:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:19:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:19:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:19:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:19:40,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:19:40,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144481791] [2023-08-24 14:19:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144481791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:19:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:19:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-24 14:19:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6608038] [2023-08-24 14:19:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:19:40,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 14:19:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:19:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 14:19:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-24 14:19:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:19:40,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 579 transitions, 7384 flow. Second operand has 12 states, 12 states have (on average 118.08333333333333) internal successors, (1417), 12 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:40,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:19:40,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:19:40,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:19:58,242 INFO L124 PetriNetUnfolderBase]: 50390/94684 cut-off events. [2023-08-24 14:19:58,242 INFO L125 PetriNetUnfolderBase]: For 851259/864943 co-relation queries the response was YES. [2023-08-24 14:19:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473449 conditions, 94684 events. 50390/94684 cut-off events. For 851259/864943 co-relation queries the response was YES. Maximal size of possible extension queue 3392. Compared 995842 event pairs, 20370 based on Foata normal form. 1959/94912 useless extension candidates. Maximal degree in co-relation 462811. Up to 72975 conditions per place. [2023-08-24 14:19:59,977 INFO L140 encePairwiseOnDemand]: 243/255 looper letters, 559 selfloop transitions, 66 changer transitions 44/743 dead transitions. [2023-08-24 14:19:59,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 743 transitions, 10325 flow [2023-08-24 14:19:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 14:19:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 14:19:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1539 transitions. [2023-08-24 14:19:59,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029411764705882 [2023-08-24 14:19:59,979 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1539 transitions. [2023-08-24 14:19:59,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1539 transitions. [2023-08-24 14:19:59,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:19:59,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1539 transitions. [2023-08-24 14:19:59,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 128.25) internal successors, (1539), 12 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:59,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 255.0) internal successors, (3315), 13 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:59,983 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 255.0) internal successors, (3315), 13 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:19:59,983 INFO L175 Difference]: Start difference. First operand has 231 places, 579 transitions, 7384 flow. Second operand 12 states and 1539 transitions. [2023-08-24 14:19:59,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 743 transitions, 10325 flow [2023-08-24 14:20:17,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 743 transitions, 10170 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-24 14:20:17,023 INFO L231 Difference]: Finished difference. Result has 244 places, 627 transitions, 8314 flow [2023-08-24 14:20:17,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8314, PETRI_PLACES=244, PETRI_TRANSITIONS=627} [2023-08-24 14:20:17,024 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 185 predicate places. [2023-08-24 14:20:17,024 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 627 transitions, 8314 flow [2023-08-24 14:20:17,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 118.08333333333333) internal successors, (1417), 12 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:17,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:20:17,025 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, 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] [2023-08-24 14:20:17,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 14:20:17,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:20:17,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:20:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1393601047, now seen corresponding path program 18 times [2023-08-24 14:20:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:20:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213920373] [2023-08-24 14:20:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:20:17,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:20:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:20:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:20:17,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:20:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213920373] [2023-08-24 14:20:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213920373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:20:17,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:20:17,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 14:20:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365952645] [2023-08-24 14:20:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:20:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:20:17,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:20:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:20:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:20:17,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:20:17,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 627 transitions, 8314 flow. Second operand has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:17,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:20:17,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:20:17,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:20:35,329 INFO L124 PetriNetUnfolderBase]: 50302/94297 cut-off events. [2023-08-24 14:20:35,329 INFO L125 PetriNetUnfolderBase]: For 895581/907779 co-relation queries the response was YES. [2023-08-24 14:20:37,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481436 conditions, 94297 events. 50302/94297 cut-off events. For 895581/907779 co-relation queries the response was YES. Maximal size of possible extension queue 3397. Compared 990279 event pairs, 20118 based on Foata normal form. 1805/94262 useless extension candidates. Maximal degree in co-relation 477989. Up to 73677 conditions per place. [2023-08-24 14:20:37,594 INFO L140 encePairwiseOnDemand]: 245/255 looper letters, 530 selfloop transitions, 63 changer transitions 42/709 dead transitions. [2023-08-24 14:20:37,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 709 transitions, 10181 flow [2023-08-24 14:20:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:20:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:20:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1158 transitions. [2023-08-24 14:20:37,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045751633986928 [2023-08-24 14:20:37,596 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1158 transitions. [2023-08-24 14:20:37,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1158 transitions. [2023-08-24 14:20:37,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:20:37,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1158 transitions. [2023-08-24 14:20:37,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.66666666666666) internal successors, (1158), 9 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:37,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:37,600 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:37,600 INFO L175 Difference]: Start difference. First operand has 244 places, 627 transitions, 8314 flow. Second operand 9 states and 1158 transitions. [2023-08-24 14:20:37,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 709 transitions, 10181 flow [2023-08-24 14:20:56,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 709 transitions, 10079 flow, removed 33 selfloop flow, removed 4 redundant places. [2023-08-24 14:20:56,401 INFO L231 Difference]: Finished difference. Result has 249 places, 624 transitions, 8345 flow [2023-08-24 14:20:56,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=8232, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8345, PETRI_PLACES=249, PETRI_TRANSITIONS=624} [2023-08-24 14:20:56,401 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 190 predicate places. [2023-08-24 14:20:56,402 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 624 transitions, 8345 flow [2023-08-24 14:20:56,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:56,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:20:56,402 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, 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] [2023-08-24 14:20:56,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 14:20:56,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:20:56,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:20:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -760170911, now seen corresponding path program 19 times [2023-08-24 14:20:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:20:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51972710] [2023-08-24 14:20:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:20:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:20:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:20:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:20:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:20:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51972710] [2023-08-24 14:20:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51972710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:20:56,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:20:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 14:20:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347429363] [2023-08-24 14:20:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:20:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:20:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:20:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:20:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:20:56,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:20:56,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 624 transitions, 8345 flow. Second operand has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:20:56,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:20:56,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:20:56,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:21:13,901 INFO L124 PetriNetUnfolderBase]: 46815/88012 cut-off events. [2023-08-24 14:21:13,901 INFO L125 PetriNetUnfolderBase]: For 838207/848334 co-relation queries the response was YES. [2023-08-24 14:21:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449032 conditions, 88012 events. 46815/88012 cut-off events. For 838207/848334 co-relation queries the response was YES. Maximal size of possible extension queue 3032. Compared 916885 event pairs, 19601 based on Foata normal form. 1719/87792 useless extension candidates. Maximal degree in co-relation 445620. Up to 65316 conditions per place. [2023-08-24 14:21:15,774 INFO L140 encePairwiseOnDemand]: 246/255 looper letters, 518 selfloop transitions, 120 changer transitions 8/720 dead transitions. [2023-08-24 14:21:15,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 720 transitions, 10620 flow [2023-08-24 14:21:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:21:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:21:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1035 transitions. [2023-08-24 14:21:15,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2023-08-24 14:21:15,775 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1035 transitions. [2023-08-24 14:21:15,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1035 transitions. [2023-08-24 14:21:15,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:21:15,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1035 transitions. [2023-08-24 14:21:15,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.375) internal successors, (1035), 8 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:15,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:15,778 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:15,779 INFO L175 Difference]: Start difference. First operand has 249 places, 624 transitions, 8345 flow. Second operand 8 states and 1035 transitions. [2023-08-24 14:21:15,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 720 transitions, 10620 flow [2023-08-24 14:21:31,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 720 transitions, 10414 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-08-24 14:21:31,511 INFO L231 Difference]: Finished difference. Result has 245 places, 635 transitions, 8723 flow [2023-08-24 14:21:31,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=8122, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8723, PETRI_PLACES=245, PETRI_TRANSITIONS=635} [2023-08-24 14:21:31,512 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 186 predicate places. [2023-08-24 14:21:31,512 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 635 transitions, 8723 flow [2023-08-24 14:21:31,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:31,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:21:31,513 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, 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] [2023-08-24 14:21:31,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 14:21:31,513 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:21:31,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:21:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 865141677, now seen corresponding path program 20 times [2023-08-24 14:21:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:21:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22784034] [2023-08-24 14:21:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:21:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:21:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:21:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:21:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:21:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22784034] [2023-08-24 14:21:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22784034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:21:31,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:21:31,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:21:31,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724658301] [2023-08-24 14:21:31,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:21:31,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:21:31,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:21:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:21:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:21:31,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:21:31,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 635 transitions, 8723 flow. Second operand has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:31,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:21:31,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:21:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:21:50,572 INFO L124 PetriNetUnfolderBase]: 46498/87652 cut-off events. [2023-08-24 14:21:50,572 INFO L125 PetriNetUnfolderBase]: For 825007/835063 co-relation queries the response was YES. [2023-08-24 14:21:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447137 conditions, 87652 events. 46498/87652 cut-off events. For 825007/835063 co-relation queries the response was YES. Maximal size of possible extension queue 3052. Compared 914574 event pairs, 19544 based on Foata normal form. 1216/87144 useless extension candidates. Maximal degree in co-relation 443787. Up to 67481 conditions per place. [2023-08-24 14:21:52,615 INFO L140 encePairwiseOnDemand]: 244/255 looper letters, 557 selfloop transitions, 83 changer transitions 15/729 dead transitions. [2023-08-24 14:21:52,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 729 transitions, 10853 flow [2023-08-24 14:21:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:21:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:21:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1044 transitions. [2023-08-24 14:21:52,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2023-08-24 14:21:52,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1044 transitions. [2023-08-24 14:21:52,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1044 transitions. [2023-08-24 14:21:52,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:21:52,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1044 transitions. [2023-08-24 14:21:52,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.5) internal successors, (1044), 8 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:52,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:52,619 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:21:52,619 INFO L175 Difference]: Start difference. First operand has 245 places, 635 transitions, 8723 flow. Second operand 8 states and 1044 transitions. [2023-08-24 14:21:52,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 729 transitions, 10853 flow [2023-08-24 14:22:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 729 transitions, 10611 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-24 14:22:08,506 INFO L231 Difference]: Finished difference. Result has 249 places, 644 transitions, 8886 flow [2023-08-24 14:22:08,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8886, PETRI_PLACES=249, PETRI_TRANSITIONS=644} [2023-08-24 14:22:08,507 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 190 predicate places. [2023-08-24 14:22:08,507 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 644 transitions, 8886 flow [2023-08-24 14:22:08,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:08,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:22:08,507 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, 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] [2023-08-24 14:22:08,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 14:22:08,508 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:22:08,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:22:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1605412465, now seen corresponding path program 21 times [2023-08-24 14:22:08,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:22:08,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669362914] [2023-08-24 14:22:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:22:08,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:22:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:22:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:22:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:22:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669362914] [2023-08-24 14:22:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669362914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:22:09,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:22:09,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 14:22:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102084383] [2023-08-24 14:22:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:22:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 14:22:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:22:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 14:22:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:22:09,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:22:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 644 transitions, 8886 flow. Second operand has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:22:09,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:22:09,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:22:27,391 INFO L124 PetriNetUnfolderBase]: 47662/89704 cut-off events. [2023-08-24 14:22:27,391 INFO L125 PetriNetUnfolderBase]: For 890547/902059 co-relation queries the response was YES. [2023-08-24 14:22:29,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462367 conditions, 89704 events. 47662/89704 cut-off events. For 890547/902059 co-relation queries the response was YES. Maximal size of possible extension queue 3120. Compared 938918 event pairs, 16322 based on Foata normal form. 3050/91048 useless extension candidates. Maximal degree in co-relation 457283. Up to 53272 conditions per place. [2023-08-24 14:22:29,325 INFO L140 encePairwiseOnDemand]: 240/255 looper letters, 619 selfloop transitions, 154 changer transitions 45/892 dead transitions. [2023-08-24 14:22:29,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 892 transitions, 12888 flow [2023-08-24 14:22:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 14:22:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 14:22:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1715 transitions. [2023-08-24 14:22:29,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173453996983409 [2023-08-24 14:22:29,327 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1715 transitions. [2023-08-24 14:22:29,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1715 transitions. [2023-08-24 14:22:29,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:22:29,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1715 transitions. [2023-08-24 14:22:29,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 131.92307692307693) internal successors, (1715), 13 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:29,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:29,332 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:29,332 INFO L175 Difference]: Start difference. First operand has 249 places, 644 transitions, 8886 flow. Second operand 13 states and 1715 transitions. [2023-08-24 14:22:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 892 transitions, 12888 flow [2023-08-24 14:22:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 892 transitions, 12774 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-08-24 14:22:45,103 INFO L231 Difference]: Finished difference. Result has 270 places, 685 transitions, 10046 flow [2023-08-24 14:22:45,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10046, PETRI_PLACES=270, PETRI_TRANSITIONS=685} [2023-08-24 14:22:45,104 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 211 predicate places. [2023-08-24 14:22:45,104 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 685 transitions, 10046 flow [2023-08-24 14:22:45,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:45,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:22:45,104 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, 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] [2023-08-24 14:22:45,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 14:22:45,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:22:45,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:22:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1080211015, now seen corresponding path program 22 times [2023-08-24 14:22:45,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:22:45,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411973272] [2023-08-24 14:22:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:22:45,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:22:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:22:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:22:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:22:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411973272] [2023-08-24 14:22:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411973272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:22:45,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:22:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 14:22:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606121179] [2023-08-24 14:22:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:22:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 14:22:45,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:22:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 14:22:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:22:45,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:22:45,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 685 transitions, 10046 flow. Second operand has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:22:45,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:22:45,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:22:45,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:23:05,197 INFO L124 PetriNetUnfolderBase]: 46864/88647 cut-off events. [2023-08-24 14:23:05,198 INFO L125 PetriNetUnfolderBase]: For 1055864/1067717 co-relation queries the response was YES. [2023-08-24 14:23:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480425 conditions, 88647 events. 46864/88647 cut-off events. For 1055864/1067717 co-relation queries the response was YES. Maximal size of possible extension queue 3090. Compared 929859 event pairs, 15930 based on Foata normal form. 1625/88770 useless extension candidates. Maximal degree in co-relation 478397. Up to 65836 conditions per place. [2023-08-24 14:23:07,282 INFO L140 encePairwiseOnDemand]: 243/255 looper letters, 560 selfloop transitions, 183 changer transitions 35/852 dead transitions. [2023-08-24 14:23:07,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 852 transitions, 13292 flow [2023-08-24 14:23:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 14:23:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 14:23:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1307 transitions. [2023-08-24 14:23:07,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125490196078432 [2023-08-24 14:23:07,284 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1307 transitions. [2023-08-24 14:23:07,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1307 transitions. [2023-08-24 14:23:07,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:23:07,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1307 transitions. [2023-08-24 14:23:07,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.7) internal successors, (1307), 10 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:07,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:07,287 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 255.0) internal successors, (2805), 11 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:07,287 INFO L175 Difference]: Start difference. First operand has 270 places, 685 transitions, 10046 flow. Second operand 10 states and 1307 transitions. [2023-08-24 14:23:07,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 852 transitions, 13292 flow [2023-08-24 14:23:23,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 852 transitions, 13112 flow, removed 82 selfloop flow, removed 4 redundant places. [2023-08-24 14:23:23,633 INFO L231 Difference]: Finished difference. Result has 280 places, 723 transitions, 11096 flow [2023-08-24 14:23:23,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11096, PETRI_PLACES=280, PETRI_TRANSITIONS=723} [2023-08-24 14:23:23,634 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 221 predicate places. [2023-08-24 14:23:23,634 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 723 transitions, 11096 flow [2023-08-24 14:23:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.36363636363636) internal successors, (1302), 11 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:23,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:23:23,635 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, 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] [2023-08-24 14:23:23,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-24 14:23:23,635 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:23:23,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:23:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1754475623, now seen corresponding path program 23 times [2023-08-24 14:23:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:23:23,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809314392] [2023-08-24 14:23:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:23:23,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:23:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:23:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:23:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:23:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809314392] [2023-08-24 14:23:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809314392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:23:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:23:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 14:23:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667755745] [2023-08-24 14:23:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:23:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:23:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:23:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:23:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:23:23,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:23:23,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 723 transitions, 11096 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:23,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:23:23,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:23:23,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:23:44,382 INFO L124 PetriNetUnfolderBase]: 46749/88692 cut-off events. [2023-08-24 14:23:44,383 INFO L125 PetriNetUnfolderBase]: For 1051235/1061813 co-relation queries the response was YES. [2023-08-24 14:23:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482954 conditions, 88692 events. 46749/88692 cut-off events. For 1051235/1061813 co-relation queries the response was YES. Maximal size of possible extension queue 3172. Compared 935305 event pairs, 19575 based on Foata normal form. 1270/88325 useless extension candidates. Maximal degree in co-relation 482842. Up to 68640 conditions per place. [2023-08-24 14:23:46,497 INFO L140 encePairwiseOnDemand]: 244/255 looper letters, 604 selfloop transitions, 60 changer transitions 64/802 dead transitions. [2023-08-24 14:23:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 802 transitions, 13169 flow [2023-08-24 14:23:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:23:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:23:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1160 transitions. [2023-08-24 14:23:46,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054466230936819 [2023-08-24 14:23:46,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1160 transitions. [2023-08-24 14:23:46,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1160 transitions. [2023-08-24 14:23:46,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:23:46,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1160 transitions. [2023-08-24 14:23:46,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.88888888888889) internal successors, (1160), 9 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:46,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:46,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:23:46,501 INFO L175 Difference]: Start difference. First operand has 280 places, 723 transitions, 11096 flow. Second operand 9 states and 1160 transitions. [2023-08-24 14:23:46,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 802 transitions, 13169 flow [2023-08-24 14:24:06,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 802 transitions, 12905 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-08-24 14:24:06,429 INFO L231 Difference]: Finished difference. Result has 284 places, 693 transitions, 10426 flow [2023-08-24 14:24:06,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=10765, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10426, PETRI_PLACES=284, PETRI_TRANSITIONS=693} [2023-08-24 14:24:06,430 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 225 predicate places. [2023-08-24 14:24:06,430 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 693 transitions, 10426 flow [2023-08-24 14:24:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:24:06,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:24:06,430 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, 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] [2023-08-24 14:24:06,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 14:24:06,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:24:06,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:24:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1920480447, now seen corresponding path program 24 times [2023-08-24 14:24:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:24:06,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679947907] [2023-08-24 14:24:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:24:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:24:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:24:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:24:06,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:24:06,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679947907] [2023-08-24 14:24:06,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679947907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:24:06,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:24:06,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 14:24:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805391463] [2023-08-24 14:24:06,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:24:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:24:06,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:24:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:24:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:24:06,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:24:06,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 693 transitions, 10426 flow. Second operand has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:24:06,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:24:06,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:24:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:24:33,317 INFO L124 PetriNetUnfolderBase]: 58869/109385 cut-off events. [2023-08-24 14:24:33,317 INFO L125 PetriNetUnfolderBase]: For 1319946/1332942 co-relation queries the response was YES. [2023-08-24 14:24:35,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591707 conditions, 109385 events. 58869/109385 cut-off events. For 1319946/1332942 co-relation queries the response was YES. Maximal size of possible extension queue 4037. Compared 1159306 event pairs, 18354 based on Foata normal form. 3052/110396 useless extension candidates. Maximal degree in co-relation 591593. Up to 53327 conditions per place. [2023-08-24 14:24:36,041 INFO L140 encePairwiseOnDemand]: 237/255 looper letters, 723 selfloop transitions, 422 changer transitions 16/1235 dead transitions. [2023-08-24 14:24:36,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1235 transitions, 19666 flow [2023-08-24 14:24:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 14:24:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 14:24:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2029 transitions. [2023-08-24 14:24:36,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304575163398693 [2023-08-24 14:24:36,044 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2029 transitions. [2023-08-24 14:24:36,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2029 transitions. [2023-08-24 14:24:36,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:24:36,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2029 transitions. [2023-08-24 14:24:36,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 135.26666666666668) internal successors, (2029), 15 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:24:36,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 255.0) internal successors, (4080), 16 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:24:36,050 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 255.0) internal successors, (4080), 16 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:24:36,050 INFO L175 Difference]: Start difference. First operand has 284 places, 693 transitions, 10426 flow. Second operand 15 states and 2029 transitions. [2023-08-24 14:24:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1235 transitions, 19666 flow [2023-08-24 14:25:00,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1235 transitions, 18924 flow, removed 155 selfloop flow, removed 12 redundant places. [2023-08-24 14:25:00,867 INFO L231 Difference]: Finished difference. Result has 290 places, 969 transitions, 16051 flow [2023-08-24 14:25:00,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=9890, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16051, PETRI_PLACES=290, PETRI_TRANSITIONS=969} [2023-08-24 14:25:00,867 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 231 predicate places. [2023-08-24 14:25:00,867 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 969 transitions, 16051 flow [2023-08-24 14:25:00,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:25:00,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:25:00,868 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, 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] [2023-08-24 14:25:00,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-24 14:25:00,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:25:00,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:25:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1547599219, now seen corresponding path program 25 times [2023-08-24 14:25:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:25:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937118032] [2023-08-24 14:25:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:25:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:25:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:25:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:25:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:25:01,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937118032] [2023-08-24 14:25:01,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937118032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:25:01,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:25:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 14:25:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164874030] [2023-08-24 14:25:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:25:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:25:01,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:25:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:25:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:25:01,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:25:01,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 969 transitions, 16051 flow. Second operand has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:25:01,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:25:01,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:25:01,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:25:29,725 INFO L124 PetriNetUnfolderBase]: 56515/105250 cut-off events. [2023-08-24 14:25:29,725 INFO L125 PetriNetUnfolderBase]: For 1704891/1723119 co-relation queries the response was YES. [2023-08-24 14:25:32,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629254 conditions, 105250 events. 56515/105250 cut-off events. For 1704891/1723119 co-relation queries the response was YES. Maximal size of possible extension queue 3712. Compared 1110954 event pairs, 19387 based on Foata normal form. 5141/108656 useless extension candidates. Maximal degree in co-relation 629135. Up to 66423 conditions per place. [2023-08-24 14:25:32,656 INFO L140 encePairwiseOnDemand]: 244/255 looper letters, 815 selfloop transitions, 217 changer transitions 3/1109 dead transitions. [2023-08-24 14:25:32,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1109 transitions, 19609 flow [2023-08-24 14:25:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 14:25:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 14:25:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1537 transitions. [2023-08-24 14:25:32,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022875816993464 [2023-08-24 14:25:32,660 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1537 transitions. [2023-08-24 14:25:32,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1537 transitions. [2023-08-24 14:25:32,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:25:32,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1537 transitions. [2023-08-24 14:25:32,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 128.08333333333334) internal successors, (1537), 12 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:25:32,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 255.0) internal successors, (3315), 13 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:25:32,664 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 255.0) internal successors, (3315), 13 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:25:32,664 INFO L175 Difference]: Start difference. First operand has 290 places, 969 transitions, 16051 flow. Second operand 12 states and 1537 transitions. [2023-08-24 14:25:32,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1109 transitions, 19609 flow [2023-08-24 14:26:05,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1109 transitions, 18859 flow, removed 375 selfloop flow, removed 0 redundant places. [2023-08-24 14:26:05,303 INFO L231 Difference]: Finished difference. Result has 311 places, 981 transitions, 16302 flow [2023-08-24 14:26:05,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=15048, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16302, PETRI_PLACES=311, PETRI_TRANSITIONS=981} [2023-08-24 14:26:05,304 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 252 predicate places. [2023-08-24 14:26:05,304 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 981 transitions, 16302 flow [2023-08-24 14:26:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:26:05,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:26:05,304 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, 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] [2023-08-24 14:26:05,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-24 14:26:05,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:26:05,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:26:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1648437881, now seen corresponding path program 26 times [2023-08-24 14:26:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:26:05,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140675853] [2023-08-24 14:26:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:26:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:26:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:26:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:26:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:26:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140675853] [2023-08-24 14:26:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140675853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:26:05,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:26:05,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 14:26:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099639037] [2023-08-24 14:26:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:26:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:26:05,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:26:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:26:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:26:05,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-08-24 14:26:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 981 transitions, 16302 flow. Second operand has 10 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:26:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:26:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-08-24 14:26:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand