/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:25:16,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:25:16,648 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:25:16,653 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:25:16,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:25:16,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:25:16,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:25:16,685 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:25:16,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:25:16,689 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:25:16,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:25:16,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:25:16,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:25:16,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:25:16,693 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:25:16,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:25:16,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:25:16,693 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:25:16,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:25:16,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:25:16,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:25:16,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:25:16,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:25:16,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:25:16,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:25:16,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:25:16,697 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:25:16,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:25:16,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:25:16,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:25:16,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:16,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:25:16,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:25:16,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:25:16,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:25:16,700 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:25:16,700 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:25:16,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:25:16,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:25:16,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:25:16,957 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:25:16,957 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:25:16,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 08:25:18,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:25:18,280 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:25:18,280 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 08:25:18,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7324022f/ce4ab175a1644feda4526d73b1b1b107/FLAG31fd4a094 [2023-08-04 08:25:18,302 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7324022f/ce4ab175a1644feda4526d73b1b1b107 [2023-08-04 08:25:18,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:25:18,305 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:25:18,306 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:18,306 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:25:18,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:25:18,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71842266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18, skipping insertion in model container [2023-08-04 08:25:18,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,346 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:25:18,542 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c[4021,4034] [2023-08-04 08:25:18,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:18,565 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:25:18,606 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c[4021,4034] [2023-08-04 08:25:18,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:18,625 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:25:18,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18 WrapperNode [2023-08-04 08:25:18,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:18,626 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:18,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:25:18,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:25:18,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,689 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 259 [2023-08-04 08:25:18,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:18,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:25:18,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:25:18,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:25:18,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,713 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:25:18,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:25:18,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:25:18,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:25:18,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (1/1) ... [2023-08-04 08:25:18,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:18,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:25:18,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:25:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:25:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:25:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:25:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:25:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:25:18,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:25:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:25:18,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:25:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:25:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:25:18,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:25:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:25:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:25:18,805 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:25:18,935 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:25:18,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:25:19,339 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:25:19,348 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:25:19,349 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 08:25:19,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:19 BoogieIcfgContainer [2023-08-04 08:25:19,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:25:19,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:25:19,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:25:19,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:25:19,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:25:18" (1/3) ... [2023-08-04 08:25:19,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b796e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:19, skipping insertion in model container [2023-08-04 08:25:19,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:18" (2/3) ... [2023-08-04 08:25:19,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b796e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:19, skipping insertion in model container [2023-08-04 08:25:19,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:19" (3/3) ... [2023-08-04 08:25:19,358 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 08:25:19,366 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:25:19,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:25:19,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:25:19,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:25:19,541 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:25:19,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,768 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 08:25:19,768 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:25:19,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 08:25:19,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:19,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,816 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:19,895 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 08:25:19,896 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:25:19,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 08:25:19,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 21798 [2023-08-04 08:25:27,902 INFO L134 LiptonReduction]: Checked pairs total: 24682 [2023-08-04 08:25:27,902 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-04 08:25:27,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:25:27,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11c37f5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:25:27,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:25:27,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:25:27,924 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 08:25:27,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:25:27,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:27,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:25:27,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:27,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash 147533601, now seen corresponding path program 1 times [2023-08-04 08:25:27,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343026004] [2023-08-04 08:25:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:25:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343026004] [2023-08-04 08:25:28,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343026004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:28,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:28,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:25:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134064741] [2023-08-04 08:25:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:28,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:28,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:28,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 08:25:28,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:28,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 08:25:28,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:28,552 INFO L124 PetriNetUnfolderBase]: 507/864 cut-off events. [2023-08-04 08:25:28,553 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 08:25:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 864 events. 507/864 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3669 event pairs, 380 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1456. Up to 830 conditions per place. [2023-08-04 08:25:28,558 INFO L140 encePairwiseOnDemand]: 598/604 looper letters, 30 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2023-08-04 08:25:28,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 158 flow [2023-08-04 08:25:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2023-08-04 08:25:28,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519867549668874 [2023-08-04 08:25:28,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2023-08-04 08:25:28,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2023-08-04 08:25:28,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:28,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2023-08-04 08:25:28,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,603 INFO L175 Difference]: Start difference. First operand has 34 places, 38 transitions, 98 flow. Second operand 3 states and 819 transitions. [2023-08-04 08:25:28,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 158 flow [2023-08-04 08:25:28,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:25:28,609 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 96 flow [2023-08-04 08:25:28,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-04 08:25:28,614 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 08:25:28,615 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 96 flow [2023-08-04 08:25:28,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:28,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:25:28,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:28,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:28,618 INFO L85 PathProgramCache]: Analyzing trace with hash 777210992, now seen corresponding path program 1 times [2023-08-04 08:25:28,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:28,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750733548] [2023-08-04 08:25:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:28,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:25:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:28,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750733548] [2023-08-04 08:25:28,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750733548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:28,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:28,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:25:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334390398] [2023-08-04 08:25:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:28,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:28,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 08:25:28,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:28,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 08:25:28,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:28,864 INFO L124 PetriNetUnfolderBase]: 490/817 cut-off events. [2023-08-04 08:25:28,864 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:25:28,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 817 events. 490/817 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3308 event pairs, 168 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1647. Up to 789 conditions per place. [2023-08-04 08:25:28,868 INFO L140 encePairwiseOnDemand]: 601/604 looper letters, 35 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:25:28,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 184 flow [2023-08-04 08:25:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-08-04 08:25:28,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530905077262693 [2023-08-04 08:25:28,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-08-04 08:25:28,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-08-04 08:25:28,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:28,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-08-04 08:25:28,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,886 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 96 flow. Second operand 3 states and 821 transitions. [2023-08-04 08:25:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 184 flow [2023-08-04 08:25:28,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 174 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:25:28,890 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-08-04 08:25:28,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-04 08:25:28,892 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-04 08:25:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-08-04 08:25:28,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:28,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:28,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:25:28,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:28,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash 296879393, now seen corresponding path program 1 times [2023-08-04 08:25:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:28,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397383617] [2023-08-04 08:25:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:25:29,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:29,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397383617] [2023-08-04 08:25:29,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397383617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498198426] [2023-08-04 08:25:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:29,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:29,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:29,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:29,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:25:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:29,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:29,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:29,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498198426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:29,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:29,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679680849] [2023-08-04 08:25:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:29,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 08:25:29,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:29,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 08:25:29,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:29,255 INFO L124 PetriNetUnfolderBase]: 485/813 cut-off events. [2023-08-04 08:25:29,256 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 08:25:29,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 813 events. 485/813 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3210 event pairs, 177 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 1641. Up to 717 conditions per place. [2023-08-04 08:25:29,259 INFO L140 encePairwiseOnDemand]: 601/604 looper letters, 40 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 08:25:29,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 202 flow [2023-08-04 08:25:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2023-08-04 08:25:29,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45584988962472406 [2023-08-04 08:25:29,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2023-08-04 08:25:29,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2023-08-04 08:25:29,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:29,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2023-08-04 08:25:29,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,268 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 826 transitions. [2023-08-04 08:25:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 202 flow [2023-08-04 08:25:29,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:25:29,270 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 98 flow [2023-08-04 08:25:29,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-08-04 08:25:29,271 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2023-08-04 08:25:29,271 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 98 flow [2023-08-04 08:25:29,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:29,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:29,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:25:29,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:29,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:29,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1310978200, now seen corresponding path program 1 times [2023-08-04 08:25:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217452441] [2023-08-04 08:25:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217452441] [2023-08-04 08:25:29,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217452441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294648790] [2023-08-04 08:25:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:29,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:29,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:25:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:29,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:29,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:25:29,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:29,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294648790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:29,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:29,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:29,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541623303] [2023-08-04 08:25:29,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:29,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:29,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 08:25:29,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 08:25:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:29,725 INFO L124 PetriNetUnfolderBase]: 315/548 cut-off events. [2023-08-04 08:25:29,725 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-04 08:25:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 548 events. 315/548 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1950 event pairs, 156 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 1186. Up to 367 conditions per place. [2023-08-04 08:25:29,728 INFO L140 encePairwiseOnDemand]: 601/604 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 08:25:29,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 222 flow [2023-08-04 08:25:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-04 08:25:29,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575055187637969 [2023-08-04 08:25:29,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-04 08:25:29,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-04 08:25:29,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:29,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-04 08:25:29,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,737 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 98 flow. Second operand 3 states and 829 transitions. [2023-08-04 08:25:29,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 222 flow [2023-08-04 08:25:29,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:25:29,739 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 106 flow [2023-08-04 08:25:29,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-04 08:25:29,740 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 08:25:29,740 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 106 flow [2023-08-04 08:25:29,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:29,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:29,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:29,946 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,SelfDestructingSolverStorable3 [2023-08-04 08:25:29,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:29,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:29,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1909818753, now seen corresponding path program 1 times [2023-08-04 08:25:29,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:29,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975555579] [2023-08-04 08:25:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:29,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:25:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975555579] [2023-08-04 08:25:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975555579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111824710] [2023-08-04 08:25:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:30,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:30,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:25:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:30,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:30,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111824710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:30,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:25:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803800833] [2023-08-04 08:25:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:30,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 08:25:30,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:30,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 08:25:30,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:30,263 INFO L124 PetriNetUnfolderBase]: 304/529 cut-off events. [2023-08-04 08:25:30,263 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 08:25:30,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 529 events. 304/529 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1814 event pairs, 221 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 1175. Up to 474 conditions per place. [2023-08-04 08:25:30,265 INFO L140 encePairwiseOnDemand]: 601/604 looper letters, 40 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-08-04 08:25:30,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 216 flow [2023-08-04 08:25:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2023-08-04 08:25:30,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45584988962472406 [2023-08-04 08:25:30,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2023-08-04 08:25:30,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2023-08-04 08:25:30,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:30,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2023-08-04 08:25:30,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,275 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 106 flow. Second operand 3 states and 826 transitions. [2023-08-04 08:25:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 216 flow [2023-08-04 08:25:30,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:30,277 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 108 flow [2023-08-04 08:25:30,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-08-04 08:25:30,278 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-04 08:25:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 108 flow [2023-08-04 08:25:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:30,279 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] [2023-08-04 08:25:30,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:25:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:30,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:30,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -132168709, now seen corresponding path program 1 times [2023-08-04 08:25:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981380980] [2023-08-04 08:25:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981380980] [2023-08-04 08:25:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981380980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233074432] [2023-08-04 08:25:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:30,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:30,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:30,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:30,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:25:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:25:30,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233074432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:30,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:25:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846800876] [2023-08-04 08:25:30,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:25:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:25:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:25:30,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 604 [2023-08-04 08:25:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 258.375) internal successors, (2067), 8 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:30,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 604 [2023-08-04 08:25:30,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:30,819 INFO L124 PetriNetUnfolderBase]: 12/33 cut-off events. [2023-08-04 08:25:30,820 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:25:30,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 33 events. 12/33 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 53 event pairs, 0 based on Foata normal form. 7/37 useless extension candidates. Maximal degree in co-relation 77. Up to 20 conditions per place. [2023-08-04 08:25:30,820 INFO L140 encePairwiseOnDemand]: 599/604 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-04 08:25:30,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 20 transitions, 94 flow [2023-08-04 08:25:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:25:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:25:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1801 transitions. [2023-08-04 08:25:30,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259697256385998 [2023-08-04 08:25:30,825 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1801 transitions. [2023-08-04 08:25:30,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1801 transitions. [2023-08-04 08:25:30,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:30,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1801 transitions. [2023-08-04 08:25:30,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,835 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,835 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 108 flow. Second operand 7 states and 1801 transitions. [2023-08-04 08:25:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 20 transitions, 94 flow [2023-08-04 08:25:30,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:30,836 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 08:25:30,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 08:25:30,837 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -10 predicate places. [2023-08-04 08:25:30,837 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 08:25:30,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 258.375) internal successors, (2067), 8 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,840 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:25:30,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:31,046 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 08:25:31,048 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:25:31,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,099 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 08:25:31,099 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:25:31,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 08:25:31,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,105 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:31,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 08:25:31,149 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 08:25:31,149 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:25:31,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 08:25:31,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 21798 [2023-08-04 08:25:37,873 INFO L134 LiptonReduction]: Checked pairs total: 24333 [2023-08-04 08:25:37,873 INFO L136 LiptonReduction]: Total number of compositions: 315 [2023-08-04 08:25:37,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:25:37,876 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11c37f5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:25:37,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:25:37,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:25:37,879 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-08-04 08:25:37,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:25:37,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:25:37,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:25:37,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1458690854, now seen corresponding path program 1 times [2023-08-04 08:25:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756641648] [2023-08-04 08:25:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756641648] [2023-08-04 08:25:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756641648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:37,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:37,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:25:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480391978] [2023-08-04 08:25:37,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:37,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 605 [2023-08-04 08:25:37,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:37,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:37,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 605 [2023-08-04 08:25:37,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:38,045 INFO L124 PetriNetUnfolderBase]: 507/864 cut-off events. [2023-08-04 08:25:38,045 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 08:25:38,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 864 events. 507/864 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3669 event pairs, 380 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1456. Up to 830 conditions per place. [2023-08-04 08:25:38,047 INFO L140 encePairwiseOnDemand]: 599/605 looper letters, 19 selfloop transitions, 2 changer transitions 13/36 dead transitions. [2023-08-04 08:25:38,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 158 flow [2023-08-04 08:25:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2023-08-04 08:25:38,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512396694214876 [2023-08-04 08:25:38,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2023-08-04 08:25:38,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2023-08-04 08:25:38,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:38,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2023-08-04 08:25:38,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,055 INFO L175 Difference]: Start difference. First operand has 34 places, 38 transitions, 98 flow. Second operand 3 states and 819 transitions. [2023-08-04 08:25:38,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 158 flow [2023-08-04 08:25:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:25:38,057 INFO L231 Difference]: Finished difference. Result has 36 places, 23 transitions, 66 flow [2023-08-04 08:25:38,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2023-08-04 08:25:38,058 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 08:25:38,058 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 66 flow [2023-08-04 08:25:38,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:38,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:38,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:25:38,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:25:38,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1253255066, now seen corresponding path program 1 times [2023-08-04 08:25:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300352931] [2023-08-04 08:25:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:38,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300352931] [2023-08-04 08:25:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300352931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989962117] [2023-08-04 08:25:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:38,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:38,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:38,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:25:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:38,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:25:38,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:38,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989962117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:38,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:25:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674116212] [2023-08-04 08:25:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:25:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:25:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:25:38,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 605 [2023-08-04 08:25:38,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 260.5) internal successors, (2084), 8 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:38,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 605 [2023-08-04 08:25:38,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:38,374 INFO L124 PetriNetUnfolderBase]: 163/298 cut-off events. [2023-08-04 08:25:38,374 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:25:38,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 298 events. 163/298 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1031 event pairs, 124 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 610. Up to 284 conditions per place. [2023-08-04 08:25:38,376 INFO L140 encePairwiseOnDemand]: 602/605 looper letters, 19 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2023-08-04 08:25:38,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 120 flow [2023-08-04 08:25:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:25:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:25:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1320 transitions. [2023-08-04 08:25:38,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2023-08-04 08:25:38,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1320 transitions. [2023-08-04 08:25:38,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1320 transitions. [2023-08-04 08:25:38,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:38,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1320 transitions. [2023-08-04 08:25:38,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 605.0) internal successors, (3630), 6 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,387 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 605.0) internal successors, (3630), 6 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,387 INFO L175 Difference]: Start difference. First operand has 36 places, 23 transitions, 66 flow. Second operand 5 states and 1320 transitions. [2023-08-04 08:25:38,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 120 flow [2023-08-04 08:25:38,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:38,389 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 88 flow [2023-08-04 08:25:38,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-04 08:25:38,389 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-04 08:25:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 88 flow [2023-08-04 08:25:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 260.5) internal successors, (2084), 8 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:38,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:38,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-04 08:25:38,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:38,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:38,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:25:38,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash -675583718, now seen corresponding path program 2 times [2023-08-04 08:25:38,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591006059] [2023-08-04 08:25:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:25:38,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:25:38,651 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:25:38,652 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:25:38,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:25:38,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:25:38,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:25:38,652 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-04 08:25:38,653 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:25:38,654 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:25:38,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:25:38,688 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:25:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:38,901 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 08:25:38,901 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 08:25:38,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 08:25:38,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:38,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:38,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:38,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:38,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:38,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 08:25:39,152 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 08:25:39,153 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 08:25:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 08:25:39,236 INFO L119 LiptonReduction]: Number of co-enabled transitions 77868 [2023-08-04 08:25:46,129 INFO L134 LiptonReduction]: Checked pairs total: 194455 [2023-08-04 08:25:46,129 INFO L136 LiptonReduction]: Total number of compositions: 409 [2023-08-04 08:25:46,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:25:46,132 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11c37f5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:25:46,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:25:46,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:25:46,134 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 08:25:46,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:25:46,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:46,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:25:46,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:46,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -810307037, now seen corresponding path program 1 times [2023-08-04 08:25:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907193492] [2023-08-04 08:25:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:25:46,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:46,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907193492] [2023-08-04 08:25:46,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907193492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:46,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:46,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:25:46,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958472440] [2023-08-04 08:25:46,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:46,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:46,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:46,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 831 [2023-08-04 08:25:46,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:46,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:46,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 831 [2023-08-04 08:25:46,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:16,678 INFO L124 PetriNetUnfolderBase]: 302984/426132 cut-off events. [2023-08-04 08:26:16,678 INFO L125 PetriNetUnfolderBase]: For 16240/16240 co-relation queries the response was YES. [2023-08-04 08:26:17,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805298 conditions, 426132 events. 302984/426132 cut-off events. For 16240/16240 co-relation queries the response was YES. Maximal size of possible extension queue 18551. Compared 3728023 event pairs, 156772 based on Foata normal form. 13100/324677 useless extension candidates. Maximal degree in co-relation 127199. Up to 368940 conditions per place. [2023-08-04 08:26:19,547 INFO L140 encePairwiseOnDemand]: 821/831 looper letters, 69 selfloop transitions, 2 changer transitions 2/121 dead transitions. [2023-08-04 08:26:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 121 transitions, 432 flow [2023-08-04 08:26:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1211 transitions. [2023-08-04 08:26:19,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48576012835940635 [2023-08-04 08:26:19,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1211 transitions. [2023-08-04 08:26:19,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1211 transitions. [2023-08-04 08:26:19,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:19,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1211 transitions. [2023-08-04 08:26:19,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.6666666666667) internal successors, (1211), 3 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,559 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 284 flow. Second operand 3 states and 1211 transitions. [2023-08-04 08:26:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 121 transitions, 432 flow [2023-08-04 08:26:19,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 121 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:26:19,573 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 270 flow [2023-08-04 08:26:19,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-08-04 08:26:19,574 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 08:26:19,575 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 270 flow [2023-08-04 08:26:19,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:19,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:26:19,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:19,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -636079157, now seen corresponding path program 1 times [2023-08-04 08:26:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761158348] [2023-08-04 08:26:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:26:19,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761158348] [2023-08-04 08:26:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761158348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074082490] [2023-08-04 08:26:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:19,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:19,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:19,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:19,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:26:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:19,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:19,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:26:19,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074082490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:19,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732365629] [2023-08-04 08:26:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:19,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 831 [2023-08-04 08:26:19,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:19,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 831 [2023-08-04 08:26:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:48,666 INFO L124 PetriNetUnfolderBase]: 302706/420822 cut-off events. [2023-08-04 08:26:48,667 INFO L125 PetriNetUnfolderBase]: For 15248/15248 co-relation queries the response was YES. [2023-08-04 08:26:49,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798817 conditions, 420822 events. 302706/420822 cut-off events. For 15248/15248 co-relation queries the response was YES. Maximal size of possible extension queue 18339. Compared 3591013 event pairs, 199533 based on Foata normal form. 0/306984 useless extension candidates. Maximal degree in co-relation 367494. Up to 365718 conditions per place. [2023-08-04 08:26:51,265 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 88 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2023-08-04 08:26:51,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 506 flow [2023-08-04 08:26:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1221 transitions. [2023-08-04 08:26:51,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897713598074609 [2023-08-04 08:26:51,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1221 transitions. [2023-08-04 08:26:51,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1221 transitions. [2023-08-04 08:26:51,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:51,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1221 transitions. [2023-08-04 08:26:51,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,278 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 270 flow. Second operand 3 states and 1221 transitions. [2023-08-04 08:26:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 506 flow [2023-08-04 08:26:51,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:26:51,414 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 274 flow [2023-08-04 08:26:51,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2023-08-04 08:26:51,415 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-08-04 08:26:51,415 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 274 flow [2023-08-04 08:26:51,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:51,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:51,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1083159644, now seen corresponding path program 1 times [2023-08-04 08:26:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40947192] [2023-08-04 08:26:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:26:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:51,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40947192] [2023-08-04 08:26:51,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40947192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55333286] [2023-08-04 08:26:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:51,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:26:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:51,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:51,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:51,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55333286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:51,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:51,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138946944] [2023-08-04 08:26:51,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:51,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 831 [2023-08-04 08:26:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 831 [2023-08-04 08:26:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:11,460 INFO L124 PetriNetUnfolderBase]: 220736/295682 cut-off events. [2023-08-04 08:27:11,461 INFO L125 PetriNetUnfolderBase]: For 16806/16806 co-relation queries the response was YES. [2023-08-04 08:27:12,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587580 conditions, 295682 events. 220736/295682 cut-off events. For 16806/16806 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 2312632 event pairs, 97111 based on Foata normal form. 0/220612 useless extension candidates. Maximal degree in co-relation 247292. Up to 181965 conditions per place. [2023-08-04 08:27:13,096 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 101 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-08-04 08:27:13,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 570 flow [2023-08-04 08:27:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1233 transitions. [2023-08-04 08:27:13,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49458483754512633 [2023-08-04 08:27:13,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1233 transitions. [2023-08-04 08:27:13,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1233 transitions. [2023-08-04 08:27:13,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:13,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1233 transitions. [2023-08-04 08:27:13,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:13,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:13,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:13,107 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 274 flow. Second operand 3 states and 1233 transitions. [2023-08-04 08:27:13,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 570 flow [2023-08-04 08:27:13,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:13,115 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 284 flow [2023-08-04 08:27:13,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2023-08-04 08:27:13,116 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 08:27:13,116 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 284 flow [2023-08-04 08:27:13,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:13,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:13,116 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] [2023-08-04 08:27:13,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:13,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:13,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:13,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash -766524810, now seen corresponding path program 1 times [2023-08-04 08:27:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95206130] [2023-08-04 08:27:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:27:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95206130] [2023-08-04 08:27:13,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95206130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318992281] [2023-08-04 08:27:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:13,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:13,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:13,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:13,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:27:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:13,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:13,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:27:13,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318992281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:13,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:13,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023682688] [2023-08-04 08:27:13,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:13,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 831 [2023-08-04 08:27:13,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:13,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:13,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 831 [2023-08-04 08:27:13,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:34,026 INFO L124 PetriNetUnfolderBase]: 213254/296188 cut-off events. [2023-08-04 08:27:34,027 INFO L125 PetriNetUnfolderBase]: For 51303/51303 co-relation queries the response was YES. [2023-08-04 08:27:34,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594045 conditions, 296188 events. 213254/296188 cut-off events. For 51303/51303 co-relation queries the response was YES. Maximal size of possible extension queue 12325. Compared 2465645 event pairs, 127819 based on Foata normal form. 0/230009 useless extension candidates. Maximal degree in co-relation 250318. Up to 233464 conditions per place. [2023-08-04 08:27:36,023 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 102 selfloop transitions, 2 changer transitions 0/152 dead transitions. [2023-08-04 08:27:36,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 152 transitions, 582 flow [2023-08-04 08:27:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1233 transitions. [2023-08-04 08:27:36,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49458483754512633 [2023-08-04 08:27:36,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1233 transitions. [2023-08-04 08:27:36,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1233 transitions. [2023-08-04 08:27:36,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:36,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1233 transitions. [2023-08-04 08:27:36,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,033 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 284 flow. Second operand 3 states and 1233 transitions. [2023-08-04 08:27:36,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 152 transitions, 582 flow [2023-08-04 08:27:39,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 580 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:39,909 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 294 flow [2023-08-04 08:27:39,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=108, PETRI_TRANSITIONS=113} [2023-08-04 08:27:39,910 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 4 predicate places. [2023-08-04 08:27:39,910 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 294 flow [2023-08-04 08:27:39,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:39,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:39,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:40,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:27:40,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:40,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1701109233, now seen corresponding path program 1 times [2023-08-04 08:27:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:40,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324690780] [2023-08-04 08:27:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:27:40,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:40,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324690780] [2023-08-04 08:27:40,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324690780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:40,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52304345] [2023-08-04 08:27:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:40,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:40,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:40,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:27:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:40,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:27:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:27:40,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:40,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52304345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:40,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:40,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:40,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581009340] [2023-08-04 08:27:40,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:40,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:40,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:40,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:40,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:40,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 831 [2023-08-04 08:27:40,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 113 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:40,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:40,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 831 [2023-08-04 08:27:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:01,011 INFO L124 PetriNetUnfolderBase]: 213254/296189 cut-off events. [2023-08-04 08:28:01,011 INFO L125 PetriNetUnfolderBase]: For 37152/37152 co-relation queries the response was YES. [2023-08-04 08:28:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595577 conditions, 296189 events. 213254/296189 cut-off events. For 37152/37152 co-relation queries the response was YES. Maximal size of possible extension queue 12325. Compared 2466535 event pairs, 143192 based on Foata normal form. 1/230255 useless extension candidates. Maximal degree in co-relation 517992. Up to 262744 conditions per place. [2023-08-04 08:28:02,973 INFO L140 encePairwiseOnDemand]: 828/831 looper letters, 64 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-04 08:28:02,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 428 flow [2023-08-04 08:28:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1194 transitions. [2023-08-04 08:28:02,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789410348977136 [2023-08-04 08:28:02,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1194 transitions. [2023-08-04 08:28:02,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1194 transitions. [2023-08-04 08:28:02,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:02,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1194 transitions. [2023-08-04 08:28:02,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 831.0) internal successors, (3324), 4 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,982 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 294 flow. Second operand 3 states and 1194 transitions. [2023-08-04 08:28:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 428 flow [2023-08-04 08:28:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:09,129 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 304 flow [2023-08-04 08:28:09,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=831, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-08-04 08:28:09,130 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2023-08-04 08:28:09,130 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 304 flow [2023-08-04 08:28:09,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:09,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:09,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:09,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:28:09,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:28:09,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:09,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1852071239, now seen corresponding path program 1 times [2023-08-04 08:28:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:09,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776605996] [2023-08-04 08:28:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:09,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:09,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776605996] [2023-08-04 08:28:09,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776605996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:09,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941792678] [2023-08-04 08:28:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:09,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:09,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:09,393 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:28:09,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:28:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:09,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:28:09,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:09,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941792678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:09,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:28:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18753793] [2023-08-04 08:28:09,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:28:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:28:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:28:09,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 831 [2023-08-04 08:28:09,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 374.5) internal successors, (2996), 8 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:09,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:09,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 831 [2023-08-04 08:28:09,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand