/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:44:56,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:44:56,511 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 02:44:56,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:44:56,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:44:56,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:44:56,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:44:56,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:44:56,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:44:56,539 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:44:56,539 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:44:56,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:44:56,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:44:56,540 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:44:56,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:44:56,541 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:44:56,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:44:56,542 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:44:56,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:44:56,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:44:56,543 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:44:56,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:44:56,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:44:56,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:44:56,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:44:56,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:44:56,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:44:56,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:44:56,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:44:56,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:44:56,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:44:56,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:44:56,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:44:56,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:44:56,804 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:44:56,805 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:44:56,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-24 02:44:57,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:44:57,949 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:44:57,950 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-24 02:44:57,957 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b12f1da79/ca3947590ae841459798b6673c2d14cc/FLAG14efe5e7a [2023-08-24 02:44:57,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b12f1da79/ca3947590ae841459798b6673c2d14cc [2023-08-24 02:44:57,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:44:57,974 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:44:57,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:44:57,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:44:57,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:44:57,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:44:57" (1/1) ... [2023-08-24 02:44:57,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d8702d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:57, skipping insertion in model container [2023-08-24 02:44:57,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:44:57" (1/1) ... [2023-08-24 02:44:58,004 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:44:58,161 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/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-24 02:44:58,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:44:58,177 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:44:58,208 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/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-24 02:44:58,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:44:58,215 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:44:58,215 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:44:58,221 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:44:58,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58 WrapperNode [2023-08-24 02:44:58,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:44:58,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:44:58,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:44:58,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:44:58,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,251 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 313 [2023-08-24 02:44:58,251 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:44:58,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:44:58,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:44:58,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:44:58,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,266 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:44:58,276 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:44:58,276 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:44:58,276 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:44:58,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (1/1) ... [2023-08-24 02:44:58,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:44:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:58,296 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 02:44:58,317 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 02:44:58,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:44:58,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:44:58,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 02:44:58,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 02:44:58,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 02:44:58,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:44:58,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:44:58,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:44:58,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 02:44:58,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:44:58,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:44:58,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:44:58,334 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 02:44:58,411 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:44:58,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:44:58,709 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:44:58,837 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:44:58,838 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 02:44:58,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:44:58 BoogieIcfgContainer [2023-08-24 02:44:58,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:44:58,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:44:58,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:44:58,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:44:58,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:44:57" (1/3) ... [2023-08-24 02:44:58,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51850cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:44:58, skipping insertion in model container [2023-08-24 02:44:58,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:58" (2/3) ... [2023-08-24 02:44:58,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51850cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:44:58, skipping insertion in model container [2023-08-24 02:44:58,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:44:58" (3/3) ... [2023-08-24 02:44:58,846 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-08-24 02:44:58,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:44:58,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:44:58,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:44:58,914 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 02:44:58,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 222 transitions, 476 flow [2023-08-24 02:44:59,029 INFO L124 PetriNetUnfolderBase]: 18/218 cut-off events. [2023-08-24 02:44:59,030 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 02:44:59,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 18/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-08-24 02:44:59,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 222 transitions, 476 flow [2023-08-24 02:44:59,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 206 transitions, 436 flow [2023-08-24 02:44:59,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:44:59,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 206 transitions, 436 flow [2023-08-24 02:44:59,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 206 transitions, 436 flow [2023-08-24 02:44:59,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 206 transitions, 436 flow [2023-08-24 02:44:59,129 INFO L124 PetriNetUnfolderBase]: 18/206 cut-off events. [2023-08-24 02:44:59,129 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 02:44:59,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 18/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-08-24 02:44:59,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-08-24 02:45:06,148 INFO L134 LiptonReduction]: Checked pairs total: 2906 [2023-08-24 02:45:06,149 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-08-24 02:45:06,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:45:06,161 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;@2bac5cd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:45:06,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 02:45:06,165 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:45:06,165 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-08-24 02:45:06,165 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 02:45:06,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:06,166 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] [2023-08-24 02:45:06,166 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 2 more)] === [2023-08-24 02:45:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 751863311, now seen corresponding path program 1 times [2023-08-24 02:45:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:06,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953489148] [2023-08-24 02:45:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:06,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:06,619 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 02:45:06,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953489148] [2023-08-24 02:45:06,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953489148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:06,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:06,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 02:45:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190459556] [2023-08-24 02:45:06,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:45:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:45:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:45:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 423 [2023-08-24 02:45:06,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 02:45:06,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:06,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 423 [2023-08-24 02:45:06,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:06,912 INFO L124 PetriNetUnfolderBase]: 1619/2217 cut-off events. [2023-08-24 02:45:06,912 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-08-24 02:45:06,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 2217 events. 1619/2217 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8947 event pairs, 272 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3417. Up to 1413 conditions per place. [2023-08-24 02:45:06,924 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-24 02:45:06,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2023-08-24 02:45:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:45:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:45:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-24 02:45:06,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988179669030733 [2023-08-24 02:45:06,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-24 02:45:06,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-24 02:45:06,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:06,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-24 02:45:06,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states 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 02:45:06,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:06,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:06,954 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 633 transitions. [2023-08-24 02:45:06,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2023-08-24 02:45:06,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 02:45:06,959 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-08-24 02:45:06,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-24 02:45:06,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-24 02:45:06,963 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-08-24 02:45:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 02:45:06,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:06,963 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] [2023-08-24 02:45:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:45:06,964 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 2 more)] === [2023-08-24 02:45:06,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 601720292, now seen corresponding path program 1 times [2023-08-24 02:45:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999300108] [2023-08-24 02:45:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:45:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999300108] [2023-08-24 02:45:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999300108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:07,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:07,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 02:45:07,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471620250] [2023-08-24 02:45:07,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:45:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:45:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:45:07,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 423 [2023-08-24 02:45:07,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 02:45:07,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:07,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 423 [2023-08-24 02:45:07,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:07,334 INFO L124 PetriNetUnfolderBase]: 2187/2884 cut-off events. [2023-08-24 02:45:07,334 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-24 02:45:07,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6424 conditions, 2884 events. 2187/2884 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11694 event pairs, 596 based on Foata normal form. 76/2324 useless extension candidates. Maximal degree in co-relation 2213. Up to 1820 conditions per place. [2023-08-24 02:45:07,346 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-24 02:45:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 264 flow [2023-08-24 02:45:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:45:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:45:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-24 02:45:07,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933018124507486 [2023-08-24 02:45:07,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-24 02:45:07,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-24 02:45:07,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:07,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-24 02:45:07,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 02:45:07,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:07,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:07,353 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 626 transitions. [2023-08-24 02:45:07,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 264 flow [2023-08-24 02:45:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:07,355 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-08-24 02:45:07,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-24 02:45:07,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-24 02:45:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-08-24 02:45:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 02:45:07,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:07,356 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] [2023-08-24 02:45:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:45:07,357 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 2 more)] === [2023-08-24 02:45:07,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1559273327, now seen corresponding path program 1 times [2023-08-24 02:45:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435413261] [2023-08-24 02:45:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:45:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435413261] [2023-08-24 02:45:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435413261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:07,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 02:45:07,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230577566] [2023-08-24 02:45:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:07,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:45:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:45:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:45:07,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 423 [2023-08-24 02:45:07,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 02:45:07,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:07,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 423 [2023-08-24 02:45:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:07,707 INFO L124 PetriNetUnfolderBase]: 2417/3341 cut-off events. [2023-08-24 02:45:07,707 INFO L125 PetriNetUnfolderBase]: For 1259/1259 co-relation queries the response was YES. [2023-08-24 02:45:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 3341 events. 2417/3341 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15397 event pairs, 747 based on Foata normal form. 100/3094 useless extension candidates. Maximal degree in co-relation 3824. Up to 2227 conditions per place. [2023-08-24 02:45:07,721 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-24 02:45:07,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 298 flow [2023-08-24 02:45:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:45:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:45:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-24 02:45:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49487785657998423 [2023-08-24 02:45:07,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-24 02:45:07,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-24 02:45:07,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:07,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-24 02:45:07,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:45:07,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:07,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states 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 02:45:07,727 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 628 transitions. [2023-08-24 02:45:07,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 298 flow [2023-08-24 02:45:07,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:07,729 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-08-24 02:45:07,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-24 02:45:07,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-24 02:45:07,730 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-08-24 02:45:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 02:45:07,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:07,730 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] [2023-08-24 02:45:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 02:45:07,731 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 2 more)] === [2023-08-24 02:45:07,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1799412817, now seen corresponding path program 1 times [2023-08-24 02:45:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142189044] [2023-08-24 02:45:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142189044] [2023-08-24 02:45:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142189044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:07,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:07,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 02:45:07,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847987458] [2023-08-24 02:45:07,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 02:45:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 02:45:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 02:45:07,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-24 02:45:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 02:45:07,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:07,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-24 02:45:07,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:08,095 INFO L124 PetriNetUnfolderBase]: 2087/3075 cut-off events. [2023-08-24 02:45:08,095 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2023-08-24 02:45:08,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7511 conditions, 3075 events. 2087/3075 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15885 event pairs, 1506 based on Foata normal form. 73/3051 useless extension candidates. Maximal degree in co-relation 3812. Up to 2237 conditions per place. [2023-08-24 02:45:08,107 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 58 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-24 02:45:08,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 320 flow [2023-08-24 02:45:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:45:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:45:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 736 transitions. [2023-08-24 02:45:08,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43498817966903075 [2023-08-24 02:45:08,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 736 transitions. [2023-08-24 02:45:08,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 736 transitions. [2023-08-24 02:45:08,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:08,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 736 transitions. [2023-08-24 02:45:08,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 02:45:08,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 02:45:08,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 02:45:08,113 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 736 transitions. [2023-08-24 02:45:08,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 320 flow [2023-08-24 02:45:08,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:08,117 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2023-08-24 02:45:08,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-24 02:45:08,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-24 02:45:08,118 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2023-08-24 02:45:08,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 02:45:08,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:08,118 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] [2023-08-24 02:45:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 02:45:08,119 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 2 more)] === [2023-08-24 02:45:08,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash 431883997, now seen corresponding path program 1 times [2023-08-24 02:45:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586499836] [2023-08-24 02:45:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:08,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:08,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586499836] [2023-08-24 02:45:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586499836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:08,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:08,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 02:45:08,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007673754] [2023-08-24 02:45:08,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 02:45:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 02:45:08,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 02:45:08,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-24 02:45:08,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 02:45:08,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:08,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-24 02:45:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:08,565 INFO L124 PetriNetUnfolderBase]: 2699/4093 cut-off events. [2023-08-24 02:45:08,565 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2023-08-24 02:45:08,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9810 conditions, 4093 events. 2699/4093 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23207 event pairs, 2028 based on Foata normal form. 134/4101 useless extension candidates. Maximal degree in co-relation 7649. Up to 2946 conditions per place. [2023-08-24 02:45:08,578 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 57 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-24 02:45:08,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 336 flow [2023-08-24 02:45:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:45:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:45:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-24 02:45:08,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43380614657210403 [2023-08-24 02:45:08,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-24 02:45:08,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-24 02:45:08,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:08,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-24 02:45:08,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 02:45:08,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 02:45:08,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 02:45:08,584 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 4 states and 734 transitions. [2023-08-24 02:45:08,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 336 flow [2023-08-24 02:45:08,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:08,588 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 157 flow [2023-08-24 02:45:08,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-24 02:45:08,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-08-24 02:45:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 157 flow [2023-08-24 02:45:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 02:45:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:08,591 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] [2023-08-24 02:45:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 02:45:08,591 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 2 more)] === [2023-08-24 02:45:08,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1232588294, now seen corresponding path program 1 times [2023-08-24 02:45:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:08,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158350181] [2023-08-24 02:45:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:08,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158350181] [2023-08-24 02:45:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158350181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:45:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433736934] [2023-08-24 02:45:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:45:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:45:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:45:08,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:45:08,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:45:08,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:08,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:45:08,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:09,798 INFO L124 PetriNetUnfolderBase]: 9193/13040 cut-off events. [2023-08-24 02:45:09,798 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-24 02:45:09,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30017 conditions, 13040 events. 9193/13040 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 68633 event pairs, 1332 based on Foata normal form. 88/13126 useless extension candidates. Maximal degree in co-relation 21486. Up to 8172 conditions per place. [2023-08-24 02:45:09,841 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 78 selfloop transitions, 7 changer transitions 27/112 dead transitions. [2023-08-24 02:45:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 112 transitions, 554 flow [2023-08-24 02:45:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:45:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:45:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1185 transitions. [2023-08-24 02:45:09,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466903073286052 [2023-08-24 02:45:09,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1185 transitions. [2023-08-24 02:45:09,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1185 transitions. [2023-08-24 02:45:09,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:09,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1185 transitions. [2023-08-24 02:45:09,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.5) internal successors, (1185), 6 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:45:09,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:09,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:09,852 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 157 flow. Second operand 6 states and 1185 transitions. [2023-08-24 02:45:09,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 112 transitions, 554 flow [2023-08-24 02:45:09,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 549 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:09,856 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 213 flow [2023-08-24 02:45:09,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-24 02:45:09,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2023-08-24 02:45:09,858 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 213 flow [2023-08-24 02:45:09,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:45:09,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:09,859 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] [2023-08-24 02:45:09,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 02:45:09,859 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 2 more)] === [2023-08-24 02:45:09,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1107812132, now seen corresponding path program 2 times [2023-08-24 02:45:09,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:09,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921828942] [2023-08-24 02:45:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:09,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:10,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921828942] [2023-08-24 02:45:10,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921828942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:10,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:10,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:45:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109019329] [2023-08-24 02:45:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:10,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:45:10,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:10,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:45:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:45:10,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 02:45:10,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:45:10,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:10,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 02:45:10,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:11,544 INFO L124 PetriNetUnfolderBase]: 13275/18924 cut-off events. [2023-08-24 02:45:11,544 INFO L125 PetriNetUnfolderBase]: For 13016/13016 co-relation queries the response was YES. [2023-08-24 02:45:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49061 conditions, 18924 events. 13275/18924 cut-off events. For 13016/13016 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 106512 event pairs, 1534 based on Foata normal form. 230/19152 useless extension candidates. Maximal degree in co-relation 36815. Up to 5222 conditions per place. [2023-08-24 02:45:11,603 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 196 selfloop transitions, 21 changer transitions 5/222 dead transitions. [2023-08-24 02:45:11,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 222 transitions, 1263 flow [2023-08-24 02:45:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:45:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:45:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1948 transitions. [2023-08-24 02:45:11,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46052009456264775 [2023-08-24 02:45:11,607 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1948 transitions. [2023-08-24 02:45:11,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1948 transitions. [2023-08-24 02:45:11,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:11,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1948 transitions. [2023-08-24 02:45:11,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.8) internal successors, (1948), 10 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states 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 02:45:11,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 02:45:11,614 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 02:45:11,614 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 213 flow. Second operand 10 states and 1948 transitions. [2023-08-24 02:45:11,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 222 transitions, 1263 flow [2023-08-24 02:45:11,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 222 transitions, 1253 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-24 02:45:11,629 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 396 flow [2023-08-24 02:45:11,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-08-24 02:45:11,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2023-08-24 02:45:11,630 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 396 flow [2023-08-24 02:45:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:45:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:11,631 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] [2023-08-24 02:45:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 02:45:11,631 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 2 more)] === [2023-08-24 02:45:11,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash -807453282, now seen corresponding path program 3 times [2023-08-24 02:45:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100133623] [2023-08-24 02:45:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:11,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100133623] [2023-08-24 02:45:11,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100133623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:11,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:11,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:45:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390109467] [2023-08-24 02:45:11,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:45:11,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:45:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:45:11,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 02:45:11,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:45:11,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:11,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 02:45:11,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:13,564 INFO L124 PetriNetUnfolderBase]: 16033/23230 cut-off events. [2023-08-24 02:45:13,565 INFO L125 PetriNetUnfolderBase]: For 36393/36393 co-relation queries the response was YES. [2023-08-24 02:45:13,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75494 conditions, 23230 events. 16033/23230 cut-off events. For 36393/36393 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 137117 event pairs, 3520 based on Foata normal form. 230/23458 useless extension candidates. Maximal degree in co-relation 64309. Up to 12922 conditions per place. [2023-08-24 02:45:13,651 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 136 selfloop transitions, 29 changer transitions 58/223 dead transitions. [2023-08-24 02:45:13,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 223 transitions, 1512 flow [2023-08-24 02:45:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:45:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:45:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1936 transitions. [2023-08-24 02:45:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45768321513002364 [2023-08-24 02:45:13,655 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1936 transitions. [2023-08-24 02:45:13,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1936 transitions. [2023-08-24 02:45:13,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:13,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1936 transitions. [2023-08-24 02:45:13,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.6) internal successors, (1936), 10 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states 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 02:45:13,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 02:45:13,663 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 423.0) internal successors, (4653), 11 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states 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 02:45:13,663 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 396 flow. Second operand 10 states and 1936 transitions. [2023-08-24 02:45:13,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 223 transitions, 1512 flow [2023-08-24 02:45:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 223 transitions, 1491 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:14,079 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 674 flow [2023-08-24 02:45:14,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=674, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-08-24 02:45:14,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2023-08-24 02:45:14,079 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 674 flow [2023-08-24 02:45:14,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:45:14,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:14,080 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] [2023-08-24 02:45:14,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 02:45:14,080 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 2 more)] === [2023-08-24 02:45:14,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash 862480312, now seen corresponding path program 4 times [2023-08-24 02:45:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:14,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431702913] [2023-08-24 02:45:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:14,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:14,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431702913] [2023-08-24 02:45:14,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431702913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:14,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:14,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 02:45:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280732657] [2023-08-24 02:45:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:45:14,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:45:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:45:14,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:45:14,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:45:14,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:14,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:45:14,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:16,514 INFO L124 PetriNetUnfolderBase]: 18985/27752 cut-off events. [2023-08-24 02:45:16,514 INFO L125 PetriNetUnfolderBase]: For 66945/66945 co-relation queries the response was YES. [2023-08-24 02:45:16,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98767 conditions, 27752 events. 18985/27752 cut-off events. For 66945/66945 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 173139 event pairs, 3410 based on Foata normal form. 328/28078 useless extension candidates. Maximal degree in co-relation 93407. Up to 17102 conditions per place. [2023-08-24 02:45:16,612 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 144 selfloop transitions, 33 changer transitions 9/186 dead transitions. [2023-08-24 02:45:16,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 186 transitions, 1611 flow [2023-08-24 02:45:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:45:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:45:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1189 transitions. [2023-08-24 02:45:16,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46847911741528764 [2023-08-24 02:45:16,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1189 transitions. [2023-08-24 02:45:16,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1189 transitions. [2023-08-24 02:45:16,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:16,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1189 transitions. [2023-08-24 02:45:16,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:45:16,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:16,619 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:16,619 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 674 flow. Second operand 6 states and 1189 transitions. [2023-08-24 02:45:16,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 186 transitions, 1611 flow [2023-08-24 02:45:16,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 186 transitions, 1560 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-24 02:45:16,935 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 938 flow [2023-08-24 02:45:16,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=938, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-08-24 02:45:16,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-08-24 02:45:16,935 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 938 flow [2023-08-24 02:45:16,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:45:16,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:16,936 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] [2023-08-24 02:45:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 02:45:16,936 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 2 more)] === [2023-08-24 02:45:16,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1107798968, now seen corresponding path program 5 times [2023-08-24 02:45:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063149383] [2023-08-24 02:45:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063149383] [2023-08-24 02:45:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063149383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279455301] [2023-08-24 02:45:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:45:17,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:17,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:17,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 02:45:17,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:45:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:45:17,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 02:45:17,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:17,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:45:17,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279455301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:17,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:45:17,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-08-24 02:45:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879970517] [2023-08-24 02:45:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:17,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 02:45:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 02:45:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-08-24 02:45:17,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 423 [2023-08-24 02:45:17,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 938 flow. Second operand has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:45:17,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:17,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 423 [2023-08-24 02:45:17,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:19,859 INFO L124 PetriNetUnfolderBase]: 17697/25855 cut-off events. [2023-08-24 02:45:19,859 INFO L125 PetriNetUnfolderBase]: For 72595/72595 co-relation queries the response was YES. [2023-08-24 02:45:19,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95928 conditions, 25855 events. 17697/25855 cut-off events. For 72595/72595 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 157749 event pairs, 4790 based on Foata normal form. 302/26155 useless extension candidates. Maximal degree in co-relation 89320. Up to 18667 conditions per place. [2023-08-24 02:45:19,959 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 124 selfloop transitions, 33 changer transitions 39/196 dead transitions. [2023-08-24 02:45:19,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 196 transitions, 1680 flow [2023-08-24 02:45:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:45:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:45:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1566 transitions. [2023-08-24 02:45:19,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-08-24 02:45:19,963 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1566 transitions. [2023-08-24 02:45:19,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1566 transitions. [2023-08-24 02:45:19,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:19,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1566 transitions. [2023-08-24 02:45:19,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states 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 02:45:19,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:45:19,970 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:45:19,970 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 938 flow. Second operand 8 states and 1566 transitions. [2023-08-24 02:45:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 196 transitions, 1680 flow [2023-08-24 02:45:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 196 transitions, 1634 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 02:45:20,735 INFO L231 Difference]: Finished difference. Result has 99 places, 103 transitions, 992 flow [2023-08-24 02:45:20,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=99, PETRI_TRANSITIONS=103} [2023-08-24 02:45:20,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2023-08-24 02:45:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 103 transitions, 992 flow [2023-08-24 02:45:20,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:45:20,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:20,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:45:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 02:45:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 02:45:20,941 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 2 more)] === [2023-08-24 02:45:20,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 598928652, now seen corresponding path program 6 times [2023-08-24 02:45:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863220530] [2023-08-24 02:45:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:21,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863220530] [2023-08-24 02:45:21,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863220530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:21,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:21,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 02:45:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320778536] [2023-08-24 02:45:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:45:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:45:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:45:21,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:45:21,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 103 transitions, 992 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:45:21,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:21,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:45:21,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:23,385 INFO L124 PetriNetUnfolderBase]: 15581/22605 cut-off events. [2023-08-24 02:45:23,386 INFO L125 PetriNetUnfolderBase]: For 71337/71337 co-relation queries the response was YES. [2023-08-24 02:45:23,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86244 conditions, 22605 events. 15581/22605 cut-off events. For 71337/71337 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 133340 event pairs, 4022 based on Foata normal form. 300/22903 useless extension candidates. Maximal degree in co-relation 81066. Up to 12037 conditions per place. [2023-08-24 02:45:23,499 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 147 selfloop transitions, 30 changer transitions 7/184 dead transitions. [2023-08-24 02:45:23,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1705 flow [2023-08-24 02:45:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:45:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:45:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1190 transitions. [2023-08-24 02:45:23,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46887312844759654 [2023-08-24 02:45:23,502 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1190 transitions. [2023-08-24 02:45:23,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1190 transitions. [2023-08-24 02:45:23,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:23,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1190 transitions. [2023-08-24 02:45:23,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 02:45:23,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:23,508 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:23,508 INFO L175 Difference]: Start difference. First operand has 99 places, 103 transitions, 992 flow. Second operand 6 states and 1190 transitions. [2023-08-24 02:45:23,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1705 flow [2023-08-24 02:45:23,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1625 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-24 02:45:23,962 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 973 flow [2023-08-24 02:45:23,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=973, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2023-08-24 02:45:23,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2023-08-24 02:45:23,963 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 973 flow [2023-08-24 02:45:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:45:23,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:23,963 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] [2023-08-24 02:45:23,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 02:45:23,964 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 2 more)] === [2023-08-24 02:45:23,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1979929344, now seen corresponding path program 7 times [2023-08-24 02:45:23,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:23,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775928196] [2023-08-24 02:45:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775928196] [2023-08-24 02:45:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775928196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460716268] [2023-08-24 02:45:24,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:45:24,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:24,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:24,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 02:45:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:24,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 02:45:24,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:24,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:45:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:24,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460716268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:45:24,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:45:24,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2023-08-24 02:45:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215045579] [2023-08-24 02:45:24,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:45:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:45:24,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:45:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:45:24,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 423 [2023-08-24 02:45:24,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 973 flow. Second operand has 17 states, 17 states have (on average 178.2941176470588) internal successors, (3031), 17 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states 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 02:45:24,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:24,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 423 [2023-08-24 02:45:24,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:29,636 INFO L124 PetriNetUnfolderBase]: 24873/36903 cut-off events. [2023-08-24 02:45:29,636 INFO L125 PetriNetUnfolderBase]: For 145133/145133 co-relation queries the response was YES. [2023-08-24 02:45:29,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147927 conditions, 36903 events. 24873/36903 cut-off events. For 145133/145133 co-relation queries the response was YES. Maximal size of possible extension queue 1420. Compared 245171 event pairs, 5516 based on Foata normal form. 1304/38205 useless extension candidates. Maximal degree in co-relation 135274. Up to 12005 conditions per place. [2023-08-24 02:45:29,828 INFO L140 encePairwiseOnDemand]: 412/423 looper letters, 411 selfloop transitions, 183 changer transitions 36/630 dead transitions. [2023-08-24 02:45:29,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 630 transitions, 6578 flow [2023-08-24 02:45:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 02:45:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 02:45:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5222 transitions. [2023-08-24 02:45:29,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089834515366433 [2023-08-24 02:45:29,837 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5222 transitions. [2023-08-24 02:45:29,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5222 transitions. [2023-08-24 02:45:29,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:29,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5222 transitions. [2023-08-24 02:45:29,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 186.5) internal successors, (5222), 28 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states 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 02:45:29,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 423.0) internal successors, (12267), 29 states have internal predecessors, (12267), 0 states have call successors, (0), 0 states 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 02:45:29,857 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 423.0) internal successors, (12267), 29 states have internal predecessors, (12267), 0 states have call successors, (0), 0 states 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 02:45:29,857 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 973 flow. Second operand 28 states and 5222 transitions. [2023-08-24 02:45:29,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 630 transitions, 6578 flow [2023-08-24 02:45:30,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 630 transitions, 6200 flow, removed 120 selfloop flow, removed 4 redundant places. [2023-08-24 02:45:30,512 INFO L231 Difference]: Finished difference. Result has 139 places, 258 transitions, 3393 flow [2023-08-24 02:45:30,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3393, PETRI_PLACES=139, PETRI_TRANSITIONS=258} [2023-08-24 02:45:30,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2023-08-24 02:45:30,513 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 258 transitions, 3393 flow [2023-08-24 02:45:30,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 178.2941176470588) internal successors, (3031), 17 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states 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 02:45:30,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:30,514 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] [2023-08-24 02:45:30,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 02:45:30,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 02:45:30,718 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 2 more)] === [2023-08-24 02:45:30,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash 200213894, now seen corresponding path program 8 times [2023-08-24 02:45:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455651010] [2023-08-24 02:45:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:30,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455651010] [2023-08-24 02:45:30,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455651010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:45:30,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:45:30,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:45:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669050720] [2023-08-24 02:45:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:45:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:45:30,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:45:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:45:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:45:30,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 258 transitions, 3393 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:45:30,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:30,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:45:30,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:35,024 INFO L124 PetriNetUnfolderBase]: 23627/34905 cut-off events. [2023-08-24 02:45:35,025 INFO L125 PetriNetUnfolderBase]: For 244588/244588 co-relation queries the response was YES. [2023-08-24 02:45:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171862 conditions, 34905 events. 23627/34905 cut-off events. For 244588/244588 co-relation queries the response was YES. Maximal size of possible extension queue 1328. Compared 228361 event pairs, 7368 based on Foata normal form. 656/35559 useless extension candidates. Maximal degree in co-relation 158844. Up to 23721 conditions per place. [2023-08-24 02:45:35,239 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 191 selfloop transitions, 151 changer transitions 0/342 dead transitions. [2023-08-24 02:45:35,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 342 transitions, 4642 flow [2023-08-24 02:45:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:45:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:45:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1180 transitions. [2023-08-24 02:45:35,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649330181245075 [2023-08-24 02:45:35,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1180 transitions. [2023-08-24 02:45:35,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1180 transitions. [2023-08-24 02:45:35,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:35,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1180 transitions. [2023-08-24 02:45:35,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.66666666666666) internal successors, (1180), 6 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 02:45:35,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:35,246 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states 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 02:45:35,246 INFO L175 Difference]: Start difference. First operand has 139 places, 258 transitions, 3393 flow. Second operand 6 states and 1180 transitions. [2023-08-24 02:45:35,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 342 transitions, 4642 flow [2023-08-24 02:45:38,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 342 transitions, 4338 flow, removed 78 selfloop flow, removed 3 redundant places. [2023-08-24 02:45:38,013 INFO L231 Difference]: Finished difference. Result has 143 places, 267 transitions, 3626 flow [2023-08-24 02:45:38,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3626, PETRI_PLACES=143, PETRI_TRANSITIONS=267} [2023-08-24 02:45:38,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2023-08-24 02:45:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 267 transitions, 3626 flow [2023-08-24 02:45:38,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:45:38,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:38,014 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] [2023-08-24 02:45:38,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 02:45:38,014 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 2 more)] === [2023-08-24 02:45:38,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash -10653480, now seen corresponding path program 9 times [2023-08-24 02:45:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588424645] [2023-08-24 02:45:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588424645] [2023-08-24 02:45:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588424645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658810259] [2023-08-24 02:45:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:45:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:38,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:38,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 02:45:38,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:45:38,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:45:38,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 02:45:38,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:38,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:45:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658810259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:45:38,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:45:38,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2023-08-24 02:45:38,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991773070] [2023-08-24 02:45:38,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:45:38,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:45:38,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:45:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:45:38,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 02:45:38,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 267 transitions, 3626 flow. Second operand has 17 states, 17 states have (on average 176.52941176470588) internal successors, (3001), 17 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states 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 02:45:38,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:38,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 02:45:38,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:45,365 INFO L124 PetriNetUnfolderBase]: 31617/46723 cut-off events. [2023-08-24 02:45:45,365 INFO L125 PetriNetUnfolderBase]: For 381072/381072 co-relation queries the response was YES. [2023-08-24 02:45:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237703 conditions, 46723 events. 31617/46723 cut-off events. For 381072/381072 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 319848 event pairs, 7610 based on Foata normal form. 1308/48029 useless extension candidates. Maximal degree in co-relation 232102. Up to 18297 conditions per place. [2023-08-24 02:45:45,718 INFO L140 encePairwiseOnDemand]: 410/423 looper letters, 319 selfloop transitions, 451 changer transitions 9/779 dead transitions. [2023-08-24 02:45:45,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 779 transitions, 11079 flow [2023-08-24 02:45:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:45:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:45:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4930 transitions. [2023-08-24 02:45:45,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43166097539619996 [2023-08-24 02:45:45,723 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4930 transitions. [2023-08-24 02:45:45,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4930 transitions. [2023-08-24 02:45:45,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:45,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4930 transitions. [2023-08-24 02:45:45,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 182.59259259259258) internal successors, (4930), 27 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states 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 02:45:45,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 423.0) internal successors, (11844), 28 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states 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 02:45:45,740 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 423.0) internal successors, (11844), 28 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states 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 02:45:45,740 INFO L175 Difference]: Start difference. First operand has 143 places, 267 transitions, 3626 flow. Second operand 27 states and 4930 transitions. [2023-08-24 02:45:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 779 transitions, 11079 flow [2023-08-24 02:45:52,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 779 transitions, 9942 flow, removed 112 selfloop flow, removed 8 redundant places. [2023-08-24 02:45:52,025 INFO L231 Difference]: Finished difference. Result has 178 places, 536 transitions, 8234 flow [2023-08-24 02:45:52,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8234, PETRI_PLACES=178, PETRI_TRANSITIONS=536} [2023-08-24 02:45:52,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2023-08-24 02:45:52,026 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 536 transitions, 8234 flow [2023-08-24 02:45:52,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.52941176470588) internal successors, (3001), 17 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states 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 02:45:52,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:52,027 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] [2023-08-24 02:45:52,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 02:45:52,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:52,243 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 2 more)] === [2023-08-24 02:45:52,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1189184923, now seen corresponding path program 1 times [2023-08-24 02:45:52,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:52,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463469102] [2023-08-24 02:45:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:52,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463469102] [2023-08-24 02:45:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463469102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897931433] [2023-08-24 02:45:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:52,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 02:45:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:52,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 02:45:52,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:45:52,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:45:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897931433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:45:52,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:45:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 16 [2023-08-24 02:45:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190504975] [2023-08-24 02:45:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:45:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:45:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:45:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:45:52,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 02:45:52,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 536 transitions, 8234 flow. Second operand has 17 states, 17 states have (on average 176.8235294117647) internal successors, (3006), 17 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states 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 02:45:52,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:52,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 02:45:52,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:46:02,283 INFO L124 PetriNetUnfolderBase]: 35766/54065 cut-off events. [2023-08-24 02:46:02,283 INFO L125 PetriNetUnfolderBase]: For 779776/779776 co-relation queries the response was YES. [2023-08-24 02:46:02,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330089 conditions, 54065 events. 35766/54065 cut-off events. For 779776/779776 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 404251 event pairs, 3446 based on Foata normal form. 2466/56530 useless extension candidates. Maximal degree in co-relation 330002. Up to 11492 conditions per place. [2023-08-24 02:46:02,855 INFO L140 encePairwiseOnDemand]: 409/423 looper letters, 716 selfloop transitions, 373 changer transitions 68/1157 dead transitions. [2023-08-24 02:46:02,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1157 transitions, 16918 flow [2023-08-24 02:46:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:46:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:46:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5394 transitions. [2023-08-24 02:46:02,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397163120567376 [2023-08-24 02:46:02,859 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5394 transitions. [2023-08-24 02:46:02,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5394 transitions. [2023-08-24 02:46:02,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:46:02,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5394 transitions. [2023-08-24 02:46:02,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states 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 02:46:02,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 423.0) internal successors, (12690), 30 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states 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 02:46:02,873 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 423.0) internal successors, (12690), 30 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states 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 02:46:02,873 INFO L175 Difference]: Start difference. First operand has 178 places, 536 transitions, 8234 flow. Second operand 29 states and 5394 transitions. [2023-08-24 02:46:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1157 transitions, 16918 flow [2023-08-24 02:46:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1157 transitions, 15492 flow, removed 673 selfloop flow, removed 3 redundant places. [2023-08-24 02:46:10,040 INFO L231 Difference]: Finished difference. Result has 228 places, 747 transitions, 11847 flow [2023-08-24 02:46:10,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=7268, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11847, PETRI_PLACES=228, PETRI_TRANSITIONS=747} [2023-08-24 02:46:10,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2023-08-24 02:46:10,041 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 747 transitions, 11847 flow [2023-08-24 02:46:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.8235294117647) internal successors, (3006), 17 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states 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 02:46:10,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:46:10,041 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] [2023-08-24 02:46:10,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 02:46:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 02:46:10,245 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 2 more)] === [2023-08-24 02:46:10,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:46:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2019351973, now seen corresponding path program 2 times [2023-08-24 02:46:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:46:10,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009982950] [2023-08-24 02:46:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:46:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:46:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:46:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:46:10,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:46:10,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009982950] [2023-08-24 02:46:10,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009982950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:46:10,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:46:10,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 02:46:10,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044615196] [2023-08-24 02:46:10,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:46:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:46:10,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:46:10,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:46:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:46:10,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:46:10,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 747 transitions, 11847 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:46:10,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:46:10,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:46:10,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:46:22,994 INFO L124 PetriNetUnfolderBase]: 41418/62510 cut-off events. [2023-08-24 02:46:22,995 INFO L125 PetriNetUnfolderBase]: For 1900233/1900233 co-relation queries the response was YES. [2023-08-24 02:46:23,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512027 conditions, 62510 events. 41418/62510 cut-off events. For 1900233/1900233 co-relation queries the response was YES. Maximal size of possible extension queue 2586. Compared 469766 event pairs, 6026 based on Foata normal form. 748/63257 useless extension candidates. Maximal degree in co-relation 511915. Up to 21550 conditions per place. [2023-08-24 02:46:23,818 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 805 selfloop transitions, 231 changer transitions 31/1067 dead transitions. [2023-08-24 02:46:23,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1067 transitions, 18641 flow [2023-08-24 02:46:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:46:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:46:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2023-08-24 02:46:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2023-08-24 02:46:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2023-08-24 02:46:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2023-08-24 02:46:23,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:46:23,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2023-08-24 02:46:23,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states 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 02:46:23,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states 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 02:46:23,824 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states 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 02:46:23,824 INFO L175 Difference]: Start difference. First operand has 228 places, 747 transitions, 11847 flow. Second operand 9 states and 1782 transitions. [2023-08-24 02:46:23,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1067 transitions, 18641 flow [2023-08-24 02:46:56,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1067 transitions, 16798 flow, removed 724 selfloop flow, removed 4 redundant places. [2023-08-24 02:46:56,911 INFO L231 Difference]: Finished difference. Result has 235 places, 834 transitions, 13138 flow [2023-08-24 02:46:56,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13138, PETRI_PLACES=235, PETRI_TRANSITIONS=834} [2023-08-24 02:46:56,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2023-08-24 02:46:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 834 transitions, 13138 flow [2023-08-24 02:46:56,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:46:56,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:46:56,912 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] [2023-08-24 02:46:56,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 02:46:56,912 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 2 more)] === [2023-08-24 02:46:56,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:46:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 476228703, now seen corresponding path program 3 times [2023-08-24 02:46:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:46:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763812854] [2023-08-24 02:46:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:46:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:46:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:46:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:46:57,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:46:57,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763812854] [2023-08-24 02:46:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763812854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:46:57,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:46:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:46:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238117855] [2023-08-24 02:46:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:46:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:46:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:46:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:46:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:46:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:46:57,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 834 transitions, 13138 flow. Second operand has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:46:57,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:46:57,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:46:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:47:11,016 INFO L124 PetriNetUnfolderBase]: 46618/69272 cut-off events. [2023-08-24 02:47:11,017 INFO L125 PetriNetUnfolderBase]: For 2049712/2049712 co-relation queries the response was YES. [2023-08-24 02:47:11,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558739 conditions, 69272 events. 46618/69272 cut-off events. For 2049712/2049712 co-relation queries the response was YES. Maximal size of possible extension queue 2821. Compared 510131 event pairs, 14474 based on Foata normal form. 504/69775 useless extension candidates. Maximal degree in co-relation 558625. Up to 49541 conditions per place. [2023-08-24 02:47:12,062 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 899 selfloop transitions, 120 changer transitions 42/1061 dead transitions. [2023-08-24 02:47:12,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1061 transitions, 18721 flow [2023-08-24 02:47:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:47:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:47:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1553 transitions. [2023-08-24 02:47:12,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589243498817967 [2023-08-24 02:47:12,064 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1553 transitions. [2023-08-24 02:47:12,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1553 transitions. [2023-08-24 02:47:12,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:47:12,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1553 transitions. [2023-08-24 02:47:12,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.125) internal successors, (1553), 8 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 02:47:12,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:47:12,068 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:47:12,068 INFO L175 Difference]: Start difference. First operand has 235 places, 834 transitions, 13138 flow. Second operand 8 states and 1553 transitions. [2023-08-24 02:47:12,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1061 transitions, 18721 flow [2023-08-24 02:47:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1061 transitions, 16996 flow, removed 588 selfloop flow, removed 7 redundant places. [2023-08-24 02:47:35,326 INFO L231 Difference]: Finished difference. Result has 234 places, 765 transitions, 11291 flow [2023-08-24 02:47:35,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=11026, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11291, PETRI_PLACES=234, PETRI_TRANSITIONS=765} [2023-08-24 02:47:35,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2023-08-24 02:47:35,327 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 765 transitions, 11291 flow [2023-08-24 02:47:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 02:47:35,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:47:35,327 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] [2023-08-24 02:47:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 02:47:35,327 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 2 more)] === [2023-08-24 02:47:35,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:47:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1742941011, now seen corresponding path program 4 times [2023-08-24 02:47:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:47:35,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295057360] [2023-08-24 02:47:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:47:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:47:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:47:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:47:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:47:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295057360] [2023-08-24 02:47:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295057360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:47:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022171806] [2023-08-24 02:47:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:47:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:47:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:47:35,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:47:35,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 02:47:35,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:47:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:47:35,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 02:47:35,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:47:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:47:36,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:47:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:47:36,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022171806] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 02:47:36,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 02:47:36,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8] total 20 [2023-08-24 02:47:36,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995105260] [2023-08-24 02:47:36,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:47:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 02:47:36,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:47:36,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 02:47:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:47:36,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 423 [2023-08-24 02:47:36,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 765 transitions, 11291 flow. Second operand has 10 states, 10 states have (on average 175.1) internal successors, (1751), 10 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states 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 02:47:36,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:47:36,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 423 [2023-08-24 02:47:36,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:47:59,734 INFO L124 PetriNetUnfolderBase]: 75051/111846 cut-off events. [2023-08-24 02:47:59,734 INFO L125 PetriNetUnfolderBase]: For 2897028/2897028 co-relation queries the response was YES. [2023-08-24 02:48:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866399 conditions, 111846 events. 75051/111846 cut-off events. For 2897028/2897028 co-relation queries the response was YES. Maximal size of possible extension queue 4687. Compared 887665 event pairs, 5813 based on Foata normal form. 132/111977 useless extension candidates. Maximal degree in co-relation 866288. Up to 22541 conditions per place. [2023-08-24 02:48:01,592 INFO L140 encePairwiseOnDemand]: 404/423 looper letters, 1129 selfloop transitions, 807 changer transitions 21/1957 dead transitions. [2023-08-24 02:48:01,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1957 transitions, 30852 flow [2023-08-24 02:48:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:48:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:48:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3967 transitions. [2023-08-24 02:48:01,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465833614769785 [2023-08-24 02:48:01,596 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3967 transitions. [2023-08-24 02:48:01,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3967 transitions. [2023-08-24 02:48:01,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:48:01,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3967 transitions. [2023-08-24 02:48:01,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 188.9047619047619) internal successors, (3967), 21 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states 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 02:48:01,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:48:01,604 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:48:01,604 INFO L175 Difference]: Start difference. First operand has 234 places, 765 transitions, 11291 flow. Second operand 21 states and 3967 transitions. [2023-08-24 02:48:01,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1957 transitions, 30852 flow [2023-08-24 02:48:37,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1957 transitions, 30204 flow, removed 204 selfloop flow, removed 7 redundant places. [2023-08-24 02:48:37,088 INFO L231 Difference]: Finished difference. Result has 258 places, 1356 transitions, 22178 flow [2023-08-24 02:48:37,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=10992, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=22178, PETRI_PLACES=258, PETRI_TRANSITIONS=1356} [2023-08-24 02:48:37,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2023-08-24 02:48:37,089 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1356 transitions, 22178 flow [2023-08-24 02:48:37,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.1) internal successors, (1751), 10 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states 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 02:48:37,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:48:37,089 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] [2023-08-24 02:48:37,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 02:48:37,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 02:48:37,290 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 2 more)] === [2023-08-24 02:48:37,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:48:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1920108339, now seen corresponding path program 5 times [2023-08-24 02:48:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:48:37,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594499667] [2023-08-24 02:48:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:48:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:48:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:48:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:48:37,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:48:37,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594499667] [2023-08-24 02:48:37,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594499667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:48:37,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:48:37,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:48:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793772071] [2023-08-24 02:48:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:48:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:48:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:48:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:48:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:48:37,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 02:48:37,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1356 transitions, 22178 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:48:37,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:48:37,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 02:48:37,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:49:05,304 INFO L124 PetriNetUnfolderBase]: 69740/105080 cut-off events. [2023-08-24 02:49:05,304 INFO L125 PetriNetUnfolderBase]: For 3338667/3338667 co-relation queries the response was YES. [2023-08-24 02:49:06,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876813 conditions, 105080 events. 69740/105080 cut-off events. For 3338667/3338667 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 834596 event pairs, 15827 based on Foata normal form. 5462/110541 useless extension candidates. Maximal degree in co-relation 876689. Up to 33721 conditions per place. [2023-08-24 02:49:07,053 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 1107 selfloop transitions, 626 changer transitions 56/1789 dead transitions. [2023-08-24 02:49:07,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1789 transitions, 32163 flow [2023-08-24 02:49:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:49:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:49:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1548 transitions. [2023-08-24 02:49:07,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574468085106383 [2023-08-24 02:49:07,055 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1548 transitions. [2023-08-24 02:49:07,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1548 transitions. [2023-08-24 02:49:07,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:49:07,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1548 transitions. [2023-08-24 02:49:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 02:49:07,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:49:07,059 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 02:49:07,059 INFO L175 Difference]: Start difference. First operand has 258 places, 1356 transitions, 22178 flow. Second operand 8 states and 1548 transitions. [2023-08-24 02:49:07,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1789 transitions, 32163 flow [2023-08-24 02:50:10,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1789 transitions, 30007 flow, removed 575 selfloop flow, removed 9 redundant places. [2023-08-24 02:50:10,023 INFO L231 Difference]: Finished difference. Result has 256 places, 1451 transitions, 23692 flow [2023-08-24 02:50:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=20053, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23692, PETRI_PLACES=256, PETRI_TRANSITIONS=1451} [2023-08-24 02:50:10,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2023-08-24 02:50:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 1451 transitions, 23692 flow [2023-08-24 02:50:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:50:10,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:50:10,025 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] [2023-08-24 02:50:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 02:50:10,025 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 2 more)] === [2023-08-24 02:50:10,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:50:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1536057061, now seen corresponding path program 6 times [2023-08-24 02:50:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:50:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581383875] [2023-08-24 02:50:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:50:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:50:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:50:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:50:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:50:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581383875] [2023-08-24 02:50:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581383875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:50:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:50:10,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 02:50:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013556223] [2023-08-24 02:50:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:50:10,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:50:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:50:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:50:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:50:10,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-24 02:50:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 1451 transitions, 23692 flow. Second operand has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:50:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:50:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-24 02:50:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:50:38,067 INFO L124 PetriNetUnfolderBase]: 67608/101400 cut-off events. [2023-08-24 02:50:38,067 INFO L125 PetriNetUnfolderBase]: For 2559721/2559721 co-relation queries the response was YES. [2023-08-24 02:50:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802433 conditions, 101400 events. 67608/101400 cut-off events. For 2559721/2559721 co-relation queries the response was YES. Maximal size of possible extension queue 4205. Compared 795456 event pairs, 19279 based on Foata normal form. 96/101495 useless extension candidates. Maximal degree in co-relation 802314. Up to 98593 conditions per place. [2023-08-24 02:50:39,617 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 1361 selfloop transitions, 126 changer transitions 25/1512 dead transitions. [2023-08-24 02:50:39,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1512 transitions, 27250 flow [2023-08-24 02:50:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:50:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:50:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2023-08-24 02:50:39,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576156703816278 [2023-08-24 02:50:39,619 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2023-08-24 02:50:39,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2023-08-24 02:50:39,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:50:39,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2023-08-24 02:50:39,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states 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 02:50:39,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 423.0) internal successors, (3384), 8 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states 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 02:50:39,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 423.0) internal successors, (3384), 8 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states 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 02:50:39,622 INFO L175 Difference]: Start difference. First operand has 256 places, 1451 transitions, 23692 flow. Second operand 7 states and 1355 transitions. [2023-08-24 02:50:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1512 transitions, 27250 flow [2023-08-24 02:51:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1512 transitions, 26710 flow, removed 148 selfloop flow, removed 3 redundant places. [2023-08-24 02:51:20,683 INFO L231 Difference]: Finished difference. Result has 261 places, 1451 transitions, 23527 flow [2023-08-24 02:51:20,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=23116, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23527, PETRI_PLACES=261, PETRI_TRANSITIONS=1451} [2023-08-24 02:51:20,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2023-08-24 02:51:20,684 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 1451 transitions, 23527 flow [2023-08-24 02:51:20,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 02:51:20,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:51:20,684 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] [2023-08-24 02:51:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 02:51:20,684 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 2 more)] === [2023-08-24 02:51:20,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:51:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1368075317, now seen corresponding path program 7 times [2023-08-24 02:51:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:51:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207242498] [2023-08-24 02:51:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:51:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:51:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:51:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:51:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:51:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207242498] [2023-08-24 02:51:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207242498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:51:20,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:51:20,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:51:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915934979] [2023-08-24 02:51:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:51:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:51:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:51:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:51:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:51:20,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-24 02:51:20,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 1451 transitions, 23527 flow. Second operand has 6 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states 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 02:51:20,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:51:20,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-24 02:51:20,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand