/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:48:07,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:48:07,865 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 23:48:07,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:48:07,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:48:07,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:48:07,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:48:07,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:48:07,897 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:48:07,897 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:48:07,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:48:07,898 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:48:07,899 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:48:07,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:48:07,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:48:07,900 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:48:07,901 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:48:07,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:48:07,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:48:07,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:48:07,902 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-13 23:48:08,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:48:08,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:48:08,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:48:08,151 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:48:08,152 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:48:08,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2025-04-13 23:48:09,517 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d469ecba8/d30256b2541b4489bfee7c56c615eca6/FLAG880d4d5ab [2025-04-13 23:48:09,743 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:48:09,744 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2025-04-13 23:48:09,755 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d469ecba8/d30256b2541b4489bfee7c56c615eca6/FLAG880d4d5ab [2025-04-13 23:48:10,518 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d469ecba8/d30256b2541b4489bfee7c56c615eca6 [2025-04-13 23:48:10,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:48:10,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:48:10,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:48:10,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:48:10,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:48:10,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54cf36df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10, skipping insertion in model container [2025-04-13 23:48:10,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:48:10,799 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2025-04-13 23:48:10,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:48:10,808 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:48:10,858 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2025-04-13 23:48:10,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:48:10,887 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:48:10,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10 WrapperNode [2025-04-13 23:48:10,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:48:10,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:48:10,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:48:10,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:48:10,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,915 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-04-13 23:48:10,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:48:10,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:48:10,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:48:10,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:48:10,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,937 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-13 23:48:10,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,949 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,953 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:48:10,954 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:48:10,954 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:48:10,954 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:48:10,954 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (1/1) ... [2025-04-13 23:48:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:48:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:10,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 23:48:10,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:48:11,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:48:11,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:48:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:48:11,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:48:11,009 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:48:11,082 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:48:11,084 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:48:11,159 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:48:11,160 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:48:11,160 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:48:11,244 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:48:11,246 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:48:11,251 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:48:11,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:48:11 BoogieIcfgContainer [2025-04-13 23:48:11,252 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:48:11,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:48:11,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:48:11,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:48:11,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:48:10" (1/3) ... [2025-04-13 23:48:11,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a61179e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:48:11, skipping insertion in model container [2025-04-13 23:48:11,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:48:10" (2/3) ... [2025-04-13 23:48:11,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a61179e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:48:11, skipping insertion in model container [2025-04-13 23:48:11,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:48:11" (3/3) ... [2025-04-13 23:48:11,260 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2025-04-13 23:48:11,270 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:48:11,271 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG triangular-1.i that has 3 procedures, 18 locations, 19 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 23:48:11,272 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:48:11,302 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:48:11,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 50 flow [2025-04-13 23:48:11,351 INFO L116 PetriNetUnfolderBase]: 4/19 cut-off events. [2025-04-13 23:48:11,353 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:48:11,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-04-13 23:48:11,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 50 flow [2025-04-13 23:48:11,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 44 flow [2025-04-13 23:48:11,362 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:48:11,371 INFO L340 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@b94c9e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:48:11,371 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:48:11,379 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:48:11,379 INFO L116 PetriNetUnfolderBase]: 4/17 cut-off events. [2025-04-13 23:48:11,379 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:48:11,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:11,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:11,384 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:11,388 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -272227646, now seen corresponding path program 1 times [2025-04-13 23:48:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:11,394 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516608140] [2025-04-13 23:48:11,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:11,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 23:48:11,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 23:48:11,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:11,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:11,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:11,730 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516608140] [2025-04-13 23:48:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516608140] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:11,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:48:11,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549121501] [2025-04-13 23:48:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:11,740 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 23:48:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:11,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 23:48:11,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 23:48:11,762 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:11,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:11,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:11,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:11,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:11,926 INFO L116 PetriNetUnfolderBase]: 237/370 cut-off events. [2025-04-13 23:48:11,927 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 23:48:11,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 370 events. 237/370 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1122 event pairs, 45 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 744. Up to 233 conditions per place. [2025-04-13 23:48:11,930 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 25 selfloop transitions, 4 changer transitions 17/46 dead transitions. [2025-04-13 23:48:11,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 46 transitions, 190 flow [2025-04-13 23:48:11,931 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:48:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:48:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2025-04-13 23:48:11,939 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2025-04-13 23:48:11,940 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 6 states and 68 transitions. [2025-04-13 23:48:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 46 transitions, 190 flow [2025-04-13 23:48:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 23:48:11,944 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 65 flow [2025-04-13 23:48:11,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=65, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2025-04-13 23:48:11,948 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2025-04-13 23:48:11,948 INFO L485 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 65 flow [2025-04-13 23:48:11,948 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:11,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:11,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:11,948 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:48:11,949 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:11,949 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 396254466, now seen corresponding path program 1 times [2025-04-13 23:48:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:11,949 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009799751] [2025-04-13 23:48:11,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:11,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 23:48:11,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 23:48:11,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:11,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:12,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009799751] [2025-04-13 23:48:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009799751] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:12,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 23:48:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373280541] [2025-04-13 23:48:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:12,076 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 23:48:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:12,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 23:48:12,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-13 23:48:12,077 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:12,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 65 flow. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:12,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:12,261 INFO L116 PetriNetUnfolderBase]: 295/480 cut-off events. [2025-04-13 23:48:12,261 INFO L117 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2025-04-13 23:48:12,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 480 events. 295/480 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1650 event pairs, 41 based on Foata normal form. 24/418 useless extension candidates. Maximal degree in co-relation 1169. Up to 219 conditions per place. [2025-04-13 23:48:12,264 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 43 selfloop transitions, 9 changer transitions 19/71 dead transitions. [2025-04-13 23:48:12,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 71 transitions, 357 flow [2025-04-13 23:48:12,265 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 23:48:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 23:48:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2025-04-13 23:48:12,266 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2025-04-13 23:48:12,266 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 65 flow. Second operand 9 states and 86 transitions. [2025-04-13 23:48:12,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 71 transitions, 357 flow [2025-04-13 23:48:12,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 341 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-04-13 23:48:12,270 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 150 flow [2025-04-13 23:48:12,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=150, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2025-04-13 23:48:12,270 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2025-04-13 23:48:12,270 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 150 flow [2025-04-13 23:48:12,271 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:12,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:12,271 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 23:48:12,271 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:12,271 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 396744576, now seen corresponding path program 2 times [2025-04-13 23:48:12,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:12,273 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535162797] [2025-04-13 23:48:12,276 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:12,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 1 equivalence classes. [2025-04-13 23:48:12,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 23:48:12,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 23:48:12,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:12,408 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535162797] [2025-04-13 23:48:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535162797] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:12,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 23:48:12,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842128276] [2025-04-13 23:48:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:12,409 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 23:48:12,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:12,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 23:48:12,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-04-13 23:48:12,409 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:12,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:12,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:12,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:12,566 INFO L116 PetriNetUnfolderBase]: 256/429 cut-off events. [2025-04-13 23:48:12,566 INFO L117 PetriNetUnfolderBase]: For 743/743 co-relation queries the response was YES. [2025-04-13 23:48:12,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 429 events. 256/429 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1515 event pairs, 41 based on Foata normal form. 39/386 useless extension candidates. Maximal degree in co-relation 1329. Up to 208 conditions per place. [2025-04-13 23:48:12,570 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 38 selfloop transitions, 9 changer transitions 25/72 dead transitions. [2025-04-13 23:48:12,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 478 flow [2025-04-13 23:48:12,572 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 23:48:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 23:48:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2025-04-13 23:48:12,573 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2025-04-13 23:48:12,573 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 150 flow. Second operand 8 states and 76 transitions. [2025-04-13 23:48:12,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 72 transitions, 478 flow [2025-04-13 23:48:12,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 72 transitions, 470 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-04-13 23:48:12,580 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 204 flow [2025-04-13 23:48:12,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2025-04-13 23:48:12,581 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2025-04-13 23:48:12,581 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 204 flow [2025-04-13 23:48:12,581 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:12,581 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:12,582 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 23:48:12,582 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:12,582 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1129004876, now seen corresponding path program 1 times [2025-04-13 23:48:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:12,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25479686] [2025-04-13 23:48:12,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:12,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:48:12,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:48:12,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:12,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:12,692 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25479686] [2025-04-13 23:48:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25479686] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:12,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:12,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 23:48:12,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569373873] [2025-04-13 23:48:12,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:12,693 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:48:12,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:12,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:48:12,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:48:12,693 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:12,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:12,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:12,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:12,896 INFO L116 PetriNetUnfolderBase]: 274/453 cut-off events. [2025-04-13 23:48:12,897 INFO L117 PetriNetUnfolderBase]: For 1315/1315 co-relation queries the response was YES. [2025-04-13 23:48:12,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 453 events. 274/453 cut-off events. For 1315/1315 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1584 event pairs, 53 based on Foata normal form. 18/381 useless extension candidates. Maximal degree in co-relation 1557. Up to 211 conditions per place. [2025-04-13 23:48:12,900 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 46 selfloop transitions, 16 changer transitions 17/79 dead transitions. [2025-04-13 23:48:12,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 573 flow [2025-04-13 23:48:12,900 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 23:48:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 23:48:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2025-04-13 23:48:12,901 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2025-04-13 23:48:12,901 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 204 flow. Second operand 11 states and 95 transitions. [2025-04-13 23:48:12,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 573 flow [2025-04-13 23:48:12,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 506 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-04-13 23:48:12,909 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 273 flow [2025-04-13 23:48:12,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=273, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2025-04-13 23:48:12,909 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2025-04-13 23:48:12,909 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 273 flow [2025-04-13 23:48:12,909 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:12,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:12,909 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:12,910 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 23:48:12,910 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:12,910 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1124046116, now seen corresponding path program 2 times [2025-04-13 23:48:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:12,910 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505373254] [2025-04-13 23:48:12,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:12,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:12,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:48:12,920 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:48:12,921 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 23:48:12,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:13,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:13,015 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505373254] [2025-04-13 23:48:13,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505373254] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:13,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:13,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 23:48:13,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279415753] [2025-04-13 23:48:13,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:13,015 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:48:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:13,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:48:13,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:48:13,016 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:13,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:13,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:13,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:13,189 INFO L116 PetriNetUnfolderBase]: 445/732 cut-off events. [2025-04-13 23:48:13,189 INFO L117 PetriNetUnfolderBase]: For 2713/2713 co-relation queries the response was YES. [2025-04-13 23:48:13,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2665 conditions, 732 events. 445/732 cut-off events. For 2713/2713 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2894 event pairs, 31 based on Foata normal form. 27/597 useless extension candidates. Maximal degree in co-relation 2638. Up to 253 conditions per place. [2025-04-13 23:48:13,193 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 57 selfloop transitions, 20 changer transitions 21/98 dead transitions. [2025-04-13 23:48:13,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 757 flow [2025-04-13 23:48:13,193 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 23:48:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 23:48:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2025-04-13 23:48:13,194 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2025-04-13 23:48:13,194 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 273 flow. Second operand 11 states and 106 transitions. [2025-04-13 23:48:13,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 757 flow [2025-04-13 23:48:13,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 98 transitions, 691 flow, removed 27 selfloop flow, removed 4 redundant places. [2025-04-13 23:48:13,201 INFO L231 Difference]: Finished difference. Result has 62 places, 42 transitions, 370 flow [2025-04-13 23:48:13,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=370, PETRI_PLACES=62, PETRI_TRANSITIONS=42} [2025-04-13 23:48:13,201 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-04-13 23:48:13,202 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 42 transitions, 370 flow [2025-04-13 23:48:13,202 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:13,202 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:13,202 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 23:48:13,202 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:13,203 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1898509928, now seen corresponding path program 3 times [2025-04-13 23:48:13,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:13,203 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793939612] [2025-04-13 23:48:13,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:48:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:13,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:48:13,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:48:13,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 23:48:13,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:13,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:13,308 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793939612] [2025-04-13 23:48:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793939612] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 23:48:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571651074] [2025-04-13 23:48:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:13,308 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:48:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:13,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:48:13,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:48:13,309 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:13,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 42 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:13,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:13,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:13,526 INFO L116 PetriNetUnfolderBase]: 382/642 cut-off events. [2025-04-13 23:48:13,526 INFO L117 PetriNetUnfolderBase]: For 3992/3992 co-relation queries the response was YES. [2025-04-13 23:48:13,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 642 events. 382/642 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 49 based on Foata normal form. 45/543 useless extension candidates. Maximal degree in co-relation 2689. Up to 223 conditions per place. [2025-04-13 23:48:13,531 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 44 selfloop transitions, 20 changer transitions 29/93 dead transitions. [2025-04-13 23:48:13,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 882 flow [2025-04-13 23:48:13,531 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 23:48:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 23:48:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2025-04-13 23:48:13,532 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-04-13 23:48:13,533 INFO L175 Difference]: Start difference. First operand has 62 places, 42 transitions, 370 flow. Second operand 10 states and 93 transitions. [2025-04-13 23:48:13,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 882 flow [2025-04-13 23:48:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 813 flow, removed 25 selfloop flow, removed 5 redundant places. [2025-04-13 23:48:13,539 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 418 flow [2025-04-13 23:48:13,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=418, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2025-04-13 23:48:13,543 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2025-04-13 23:48:13,543 INFO L485 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 418 flow [2025-04-13 23:48:13,543 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:13,544 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:13,544 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 23:48:13,544 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:13,544 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash -991371183, now seen corresponding path program 1 times [2025-04-13 23:48:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:13,544 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905414047] [2025-04-13 23:48:13,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:13,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:48:13,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:48:13,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:13,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:13,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:13,644 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905414047] [2025-04-13 23:48:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905414047] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:48:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 23:48:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272710014] [2025-04-13 23:48:13,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:13,644 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 23:48:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:13,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 23:48:13,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-04-13 23:48:13,645 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:13,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:13,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:13,824 INFO L116 PetriNetUnfolderBase]: 391/651 cut-off events. [2025-04-13 23:48:13,824 INFO L117 PetriNetUnfolderBase]: For 4585/4585 co-relation queries the response was YES. [2025-04-13 23:48:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 651 events. 391/651 cut-off events. For 4585/4585 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2504 event pairs, 37 based on Foata normal form. 18/525 useless extension candidates. Maximal degree in co-relation 2831. Up to 157 conditions per place. [2025-04-13 23:48:13,829 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 45 selfloop transitions, 26 changer transitions 21/92 dead transitions. [2025-04-13 23:48:13,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 904 flow [2025-04-13 23:48:13,829 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 23:48:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 23:48:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2025-04-13 23:48:13,831 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-04-13 23:48:13,831 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 418 flow. Second operand 10 states and 93 transitions. [2025-04-13 23:48:13,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 904 flow [2025-04-13 23:48:13,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 822 flow, removed 25 selfloop flow, removed 8 redundant places. [2025-04-13 23:48:13,840 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 492 flow [2025-04-13 23:48:13,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=492, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2025-04-13 23:48:13,841 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 48 predicate places. [2025-04-13 23:48:13,842 INFO L485 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 492 flow [2025-04-13 23:48:13,842 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:13,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:13,842 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:13,842 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 23:48:13,842 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:13,842 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:13,842 INFO L85 PathProgramCache]: Analyzing trace with hash 599557581, now seen corresponding path program 1 times [2025-04-13 23:48:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:13,843 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996977621] [2025-04-13 23:48:13,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:13,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:48:13,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:48:13,855 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:13,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:13,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:13,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996977621] [2025-04-13 23:48:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996977621] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:13,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174310009] [2025-04-13 23:48:13,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:13,968 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) [2025-04-13 23:48:13,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 23:48:14,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:48:14,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:48:14,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:14,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:14,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-13 23:48:14,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:14,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174310009] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:14,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:14,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-04-13 23:48:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106394404] [2025-04-13 23:48:14,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:14,212 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:48:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:14,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:48:14,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:48:14,213 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 492 flow. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:14,566 INFO L116 PetriNetUnfolderBase]: 535/894 cut-off events. [2025-04-13 23:48:14,567 INFO L117 PetriNetUnfolderBase]: For 8997/8997 co-relation queries the response was YES. [2025-04-13 23:48:14,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4337 conditions, 894 events. 535/894 cut-off events. For 8997/8997 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3330 event pairs, 137 based on Foata normal form. 63/747 useless extension candidates. Maximal degree in co-relation 4301. Up to 507 conditions per place. [2025-04-13 23:48:14,571 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 68 selfloop transitions, 17 changer transitions 64/149 dead transitions. [2025-04-13 23:48:14,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 149 transitions, 1554 flow [2025-04-13 23:48:14,571 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 23:48:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 23:48:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 171 transitions. [2025-04-13 23:48:14,572 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-04-13 23:48:14,572 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 492 flow. Second operand 19 states and 171 transitions. [2025-04-13 23:48:14,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 149 transitions, 1554 flow [2025-04-13 23:48:14,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1460 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-04-13 23:48:14,583 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 626 flow [2025-04-13 23:48:14,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=626, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2025-04-13 23:48:14,585 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2025-04-13 23:48:14,585 INFO L485 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 626 flow [2025-04-13 23:48:14,585 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:14,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:14,586 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:14,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:14,786 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:14,786 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:14,787 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1470018493, now seen corresponding path program 2 times [2025-04-13 23:48:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:14,787 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330859442] [2025-04-13 23:48:14,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:14,792 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-13 23:48:14,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:48:14,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:14,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:14,877 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330859442] [2025-04-13 23:48:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330859442] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:14,877 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203339777] [2025-04-13 23:48:14,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:14,879 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) [2025-04-13 23:48:14,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 23:48:14,915 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-13 23:48:14,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:48:14,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:14,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:14,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-13 23:48:14,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:14,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203339777] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:15,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-04-13 23:48:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449915308] [2025-04-13 23:48:15,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:15,049 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:48:15,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:15,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:48:15,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:48:15,049 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 626 flow. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:15,652 INFO L116 PetriNetUnfolderBase]: 823/1371 cut-off events. [2025-04-13 23:48:15,652 INFO L117 PetriNetUnfolderBase]: For 34089/34089 co-relation queries the response was YES. [2025-04-13 23:48:15,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8773 conditions, 1371 events. 823/1371 cut-off events. For 34089/34089 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5813 event pairs, 57 based on Foata normal form. 72/1107 useless extension candidates. Maximal degree in co-relation 8726. Up to 310 conditions per place. [2025-04-13 23:48:15,663 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 89 selfloop transitions, 47 changer transitions 74/210 dead transitions. [2025-04-13 23:48:15,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 210 transitions, 2806 flow [2025-04-13 23:48:15,664 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 23:48:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 23:48:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 247 transitions. [2025-04-13 23:48:15,665 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43562610229276894 [2025-04-13 23:48:15,665 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 626 flow. Second operand 27 states and 247 transitions. [2025-04-13 23:48:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 210 transitions, 2806 flow [2025-04-13 23:48:15,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 210 transitions, 2262 flow, removed 261 selfloop flow, removed 12 redundant places. [2025-04-13 23:48:15,692 INFO L231 Difference]: Finished difference. Result has 118 places, 68 transitions, 1029 flow [2025-04-13 23:48:15,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1029, PETRI_PLACES=118, PETRI_TRANSITIONS=68} [2025-04-13 23:48:15,692 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2025-04-13 23:48:15,692 INFO L485 AbstractCegarLoop]: Abstraction has has 118 places, 68 transitions, 1029 flow [2025-04-13 23:48:15,693 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:15,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:15,693 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:15,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 23:48:15,893 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-04-13 23:48:15,894 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:15,894 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash -892279348, now seen corresponding path program 1 times [2025-04-13 23:48:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:15,894 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768873960] [2025-04-13 23:48:15,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:15,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 23:48:15,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 23:48:15,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:15,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:16,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768873960] [2025-04-13 23:48:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768873960] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:16,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160335753] [2025-04-13 23:48:16,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:48:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:16,002 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) [2025-04-13 23:48:16,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 23:48:16,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 23:48:16,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 23:48:16,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:16,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:16,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 23:48:16,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:16,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:16,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160335753] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:16,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:16,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:48:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370724078] [2025-04-13 23:48:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:16,193 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:16,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:16,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:16,194 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:16,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 68 transitions, 1029 flow. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:16,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:16,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:16,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:16,754 INFO L116 PetriNetUnfolderBase]: 1057/1776 cut-off events. [2025-04-13 23:48:16,754 INFO L117 PetriNetUnfolderBase]: For 81571/81571 co-relation queries the response was YES. [2025-04-13 23:48:16,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14051 conditions, 1776 events. 1057/1776 cut-off events. For 81571/81571 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8092 event pairs, 131 based on Foata normal form. 63/1389 useless extension candidates. Maximal degree in co-relation 13992. Up to 490 conditions per place. [2025-04-13 23:48:16,770 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 99 selfloop transitions, 52 changer transitions 65/216 dead transitions. [2025-04-13 23:48:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 3635 flow [2025-04-13 23:48:16,770 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 23:48:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 23:48:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 232 transitions. [2025-04-13 23:48:16,774 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4419047619047619 [2025-04-13 23:48:16,774 INFO L175 Difference]: Start difference. First operand has 118 places, 68 transitions, 1029 flow. Second operand 25 states and 232 transitions. [2025-04-13 23:48:16,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 3635 flow [2025-04-13 23:48:16,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 216 transitions, 3055 flow, removed 274 selfloop flow, removed 15 redundant places. [2025-04-13 23:48:16,830 INFO L231 Difference]: Finished difference. Result has 134 places, 79 transitions, 1318 flow [2025-04-13 23:48:16,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1318, PETRI_PLACES=134, PETRI_TRANSITIONS=79} [2025-04-13 23:48:16,831 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2025-04-13 23:48:16,831 INFO L485 AbstractCegarLoop]: Abstraction has has 134 places, 79 transitions, 1318 flow [2025-04-13 23:48:16,831 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:16,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:16,831 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:16,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:17,032 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:17,032 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:17,033 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash 958544518, now seen corresponding path program 2 times [2025-04-13 23:48:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:17,033 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313770041] [2025-04-13 23:48:17,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:17,037 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 23:48:17,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 23:48:17,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:17,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:17,114 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313770041] [2025-04-13 23:48:17,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313770041] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:17,114 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129912359] [2025-04-13 23:48:17,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:17,116 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) [2025-04-13 23:48:17,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 23:48:17,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 23:48:17,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 23:48:17,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:17,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:17,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 23:48:17,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:17,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:17,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129912359] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:17,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:17,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:48:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778047100] [2025-04-13 23:48:17,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:17,270 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:17,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:17,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:17,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:17,270 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:17,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 79 transitions, 1318 flow. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:17,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:17,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:17,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:17,894 INFO L116 PetriNetUnfolderBase]: 1174/2010 cut-off events. [2025-04-13 23:48:17,895 INFO L117 PetriNetUnfolderBase]: For 131190/131190 co-relation queries the response was YES. [2025-04-13 23:48:17,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17062 conditions, 2010 events. 1174/2010 cut-off events. For 131190/131190 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9426 event pairs, 25 based on Foata normal form. 135/1617 useless extension candidates. Maximal degree in co-relation 16996. Up to 496 conditions per place. [2025-04-13 23:48:17,910 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 92 selfloop transitions, 79 changer transitions 96/267 dead transitions. [2025-04-13 23:48:17,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 267 transitions, 5198 flow [2025-04-13 23:48:17,910 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-13 23:48:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-13 23:48:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 273 transitions. [2025-04-13 23:48:17,911 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-04-13 23:48:17,911 INFO L175 Difference]: Start difference. First operand has 134 places, 79 transitions, 1318 flow. Second operand 30 states and 273 transitions. [2025-04-13 23:48:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 267 transitions, 5198 flow [2025-04-13 23:48:18,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 267 transitions, 4434 flow, removed 348 selfloop flow, removed 18 redundant places. [2025-04-13 23:48:18,015 INFO L231 Difference]: Finished difference. Result has 157 places, 100 transitions, 1959 flow [2025-04-13 23:48:18,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1959, PETRI_PLACES=157, PETRI_TRANSITIONS=100} [2025-04-13 23:48:18,015 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2025-04-13 23:48:18,016 INFO L485 AbstractCegarLoop]: Abstraction has has 157 places, 100 transitions, 1959 flow [2025-04-13 23:48:18,016 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:18,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:18,016 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:18,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:18,220 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:18,220 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:18,220 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 13680550, now seen corresponding path program 3 times [2025-04-13 23:48:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:18,221 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027182849] [2025-04-13 23:48:18,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:48:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:18,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-04-13 23:48:18,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 23:48:18,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:48:18,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:18,349 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027182849] [2025-04-13 23:48:18,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027182849] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:18,350 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582119106] [2025-04-13 23:48:18,350 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:48:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:18,353 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) [2025-04-13 23:48:18,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 23:48:18,385 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-04-13 23:48:18,399 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 23:48:18,399 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:48:18,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:18,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 23:48:18,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:18,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582119106] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:18,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2025-04-13 23:48:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269168746] [2025-04-13 23:48:18,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:18,571 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 23:48:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:18,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 23:48:18,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-04-13 23:48:18,572 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:18,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 100 transitions, 1959 flow. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:18,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:18,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:19,394 INFO L116 PetriNetUnfolderBase]: 1390/2343 cut-off events. [2025-04-13 23:48:19,394 INFO L117 PetriNetUnfolderBase]: For 193259/193259 co-relation queries the response was YES. [2025-04-13 23:48:19,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21674 conditions, 2343 events. 1390/2343 cut-off events. For 193259/193259 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10696 event pairs, 19 based on Foata normal form. 54/1791 useless extension candidates. Maximal degree in co-relation 21598. Up to 568 conditions per place. [2025-04-13 23:48:19,412 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 114 selfloop transitions, 101 changer transitions 85/300 dead transitions. [2025-04-13 23:48:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 300 transitions, 6327 flow [2025-04-13 23:48:19,413 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 23:48:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 23:48:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 309 transitions. [2025-04-13 23:48:19,414 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4327731092436975 [2025-04-13 23:48:19,414 INFO L175 Difference]: Start difference. First operand has 157 places, 100 transitions, 1959 flow. Second operand 34 states and 309 transitions. [2025-04-13 23:48:19,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 300 transitions, 6327 flow [2025-04-13 23:48:19,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 300 transitions, 5238 flow, removed 514 selfloop flow, removed 20 redundant places. [2025-04-13 23:48:19,575 INFO L231 Difference]: Finished difference. Result has 178 places, 122 transitions, 2500 flow [2025-04-13 23:48:19,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2500, PETRI_PLACES=178, PETRI_TRANSITIONS=122} [2025-04-13 23:48:19,575 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2025-04-13 23:48:19,575 INFO L485 AbstractCegarLoop]: Abstraction has has 178 places, 122 transitions, 2500 flow [2025-04-13 23:48:19,576 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:19,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:19,576 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:19,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-13 23:48:19,776 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-04-13 23:48:19,776 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:19,777 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -938546766, now seen corresponding path program 4 times [2025-04-13 23:48:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:19,777 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459662705] [2025-04-13 23:48:19,777 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:19,781 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:19,785 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:19,785 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:19,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:19,970 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459662705] [2025-04-13 23:48:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459662705] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:19,970 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207789611] [2025-04-13 23:48:19,970 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:19,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:19,972 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) [2025-04-13 23:48:19,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 23:48:20,003 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:20,013 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:20,014 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:20,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:20,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:20,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:20,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207789611] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:20,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:20,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-04-13 23:48:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313664986] [2025-04-13 23:48:20,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:20,148 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:20,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:20,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:20,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:20,148 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:20,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 122 transitions, 2500 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:20,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:20,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:20,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:20,654 INFO L116 PetriNetUnfolderBase]: 1372/2334 cut-off events. [2025-04-13 23:48:20,654 INFO L117 PetriNetUnfolderBase]: For 205718/205718 co-relation queries the response was YES. [2025-04-13 23:48:20,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 2334 events. 1372/2334 cut-off events. For 205718/205718 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 10998 event pairs, 485 based on Foata normal form. 27/1749 useless extension candidates. Maximal degree in co-relation 20984. Up to 1699 conditions per place. [2025-04-13 23:48:20,669 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 137 selfloop transitions, 36 changer transitions 45/218 dead transitions. [2025-04-13 23:48:20,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 218 transitions, 4742 flow [2025-04-13 23:48:20,672 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 23:48:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 23:48:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 166 transitions. [2025-04-13 23:48:20,672 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41604010025062654 [2025-04-13 23:48:20,672 INFO L175 Difference]: Start difference. First operand has 178 places, 122 transitions, 2500 flow. Second operand 19 states and 166 transitions. [2025-04-13 23:48:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 218 transitions, 4742 flow [2025-04-13 23:48:20,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 218 transitions, 3721 flow, removed 471 selfloop flow, removed 25 redundant places. [2025-04-13 23:48:20,875 INFO L231 Difference]: Finished difference. Result has 170 places, 126 transitions, 2127 flow [2025-04-13 23:48:20,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2127, PETRI_PLACES=170, PETRI_TRANSITIONS=126} [2025-04-13 23:48:20,876 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2025-04-13 23:48:20,876 INFO L485 AbstractCegarLoop]: Abstraction has has 170 places, 126 transitions, 2127 flow [2025-04-13 23:48:20,876 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:20,876 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:20,876 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:20,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-13 23:48:21,076 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:21,077 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:21,077 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1442269270, now seen corresponding path program 5 times [2025-04-13 23:48:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:21,077 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16603903] [2025-04-13 23:48:21,077 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:21,081 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-04-13 23:48:21,085 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:21,085 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-04-13 23:48:21,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:21,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16603903] [2025-04-13 23:48:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16603903] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:21,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033598071] [2025-04-13 23:48:21,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:21,238 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) [2025-04-13 23:48:21,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 23:48:21,267 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 6 equivalence classes. [2025-04-13 23:48:21,279 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:21,279 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-04-13 23:48:21,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:21,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:21,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:21,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033598071] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:21,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:21,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-04-13 23:48:21,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563690903] [2025-04-13 23:48:21,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:21,453 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 23:48:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:21,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 23:48:21,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-04-13 23:48:21,454 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:21,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 126 transitions, 2127 flow. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:21,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:21,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:21,998 INFO L116 PetriNetUnfolderBase]: 1534/2658 cut-off events. [2025-04-13 23:48:21,999 INFO L117 PetriNetUnfolderBase]: For 159130/159130 co-relation queries the response was YES. [2025-04-13 23:48:22,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20652 conditions, 2658 events. 1534/2658 cut-off events. For 159130/159130 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 13207 event pairs, 407 based on Foata normal form. 27/1965 useless extension candidates. Maximal degree in co-relation 20580. Up to 1525 conditions per place. [2025-04-13 23:48:22,010 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 137 selfloop transitions, 63 changer transitions 47/247 dead transitions. [2025-04-13 23:48:22,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 247 transitions, 4502 flow [2025-04-13 23:48:22,012 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 23:48:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 23:48:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 189 transitions. [2025-04-13 23:48:22,012 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-04-13 23:48:22,012 INFO L175 Difference]: Start difference. First operand has 170 places, 126 transitions, 2127 flow. Second operand 22 states and 189 transitions. [2025-04-13 23:48:22,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 247 transitions, 4502 flow [2025-04-13 23:48:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 247 transitions, 4308 flow, removed 73 selfloop flow, removed 12 redundant places. [2025-04-13 23:48:22,157 INFO L231 Difference]: Finished difference. Result has 188 places, 145 transitions, 2683 flow [2025-04-13 23:48:22,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2683, PETRI_PLACES=188, PETRI_TRANSITIONS=145} [2025-04-13 23:48:22,158 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 166 predicate places. [2025-04-13 23:48:22,158 INFO L485 AbstractCegarLoop]: Abstraction has has 188 places, 145 transitions, 2683 flow [2025-04-13 23:48:22,158 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:22,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:22,158 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:22,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 23:48:22,358 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:22,359 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:22,359 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:22,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1570533842, now seen corresponding path program 6 times [2025-04-13 23:48:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:22,359 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411857543] [2025-04-13 23:48:22,359 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 23:48:22,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:22,365 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-04-13 23:48:22,370 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:22,371 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-04-13 23:48:22,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:22,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:22,507 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411857543] [2025-04-13 23:48:22,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411857543] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:22,507 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258789625] [2025-04-13 23:48:22,507 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 23:48:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:22,509 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) [2025-04-13 23:48:22,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-13 23:48:22,539 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-04-13 23:48:22,553 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:22,553 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-04-13 23:48:22,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:22,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:22,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:22,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:22,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258789625] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:22,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:22,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-04-13 23:48:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019232465] [2025-04-13 23:48:22,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:22,664 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:22,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:22,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:22,664 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:22,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 145 transitions, 2683 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:23,180 INFO L116 PetriNetUnfolderBase]: 1588/2766 cut-off events. [2025-04-13 23:48:23,181 INFO L117 PetriNetUnfolderBase]: For 185648/185648 co-relation queries the response was YES. [2025-04-13 23:48:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22481 conditions, 2766 events. 1588/2766 cut-off events. For 185648/185648 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 13844 event pairs, 317 based on Foata normal form. 27/2037 useless extension candidates. Maximal degree in co-relation 22400. Up to 1207 conditions per place. [2025-04-13 23:48:23,237 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 121 selfloop transitions, 84 changer transitions 49/254 dead transitions. [2025-04-13 23:48:23,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 254 transitions, 4957 flow [2025-04-13 23:48:23,237 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 23:48:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 23:48:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 185 transitions. [2025-04-13 23:48:23,238 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41950113378684806 [2025-04-13 23:48:23,238 INFO L175 Difference]: Start difference. First operand has 188 places, 145 transitions, 2683 flow. Second operand 21 states and 185 transitions. [2025-04-13 23:48:23,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 254 transitions, 4957 flow [2025-04-13 23:48:23,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 254 transitions, 4675 flow, removed 119 selfloop flow, removed 11 redundant places. [2025-04-13 23:48:23,437 INFO L231 Difference]: Finished difference. Result has 201 places, 151 transitions, 2927 flow [2025-04-13 23:48:23,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2927, PETRI_PLACES=201, PETRI_TRANSITIONS=151} [2025-04-13 23:48:23,437 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 179 predicate places. [2025-04-13 23:48:23,438 INFO L485 AbstractCegarLoop]: Abstraction has has 201 places, 151 transitions, 2927 flow [2025-04-13 23:48:23,438 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:23,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:23,438 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:23,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-13 23:48:23,638 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-13 23:48:23,638 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:23,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2087416878, now seen corresponding path program 7 times [2025-04-13 23:48:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:23,639 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398356106] [2025-04-13 23:48:23,639 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 23:48:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:23,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 23:48:23,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:23,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:23,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:23,789 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398356106] [2025-04-13 23:48:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398356106] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:23,789 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891108653] [2025-04-13 23:48:23,789 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 23:48:23,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:23,792 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) [2025-04-13 23:48:23,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-13 23:48:23,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 23:48:23,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:23,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:23,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:23,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:23,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:23,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:24,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891108653] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:24,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:24,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-04-13 23:48:24,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610598719] [2025-04-13 23:48:24,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:24,018 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 23:48:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:24,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 23:48:24,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-04-13 23:48:24,019 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:24,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 151 transitions, 2927 flow. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:24,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:24,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:24,695 INFO L116 PetriNetUnfolderBase]: 1714/3018 cut-off events. [2025-04-13 23:48:24,695 INFO L117 PetriNetUnfolderBase]: For 211319/211319 co-relation queries the response was YES. [2025-04-13 23:48:24,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 3018 events. 1714/3018 cut-off events. For 211319/211319 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15709 event pairs, 245 based on Foata normal form. 27/2205 useless extension candidates. Maximal degree in co-relation 24892. Up to 1033 conditions per place. [2025-04-13 23:48:24,714 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 122 selfloop transitions, 107 changer transitions 51/280 dead transitions. [2025-04-13 23:48:24,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 280 transitions, 5579 flow [2025-04-13 23:48:24,715 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 23:48:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 23:48:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 209 transitions. [2025-04-13 23:48:24,716 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2025-04-13 23:48:24,716 INFO L175 Difference]: Start difference. First operand has 201 places, 151 transitions, 2927 flow. Second operand 24 states and 209 transitions. [2025-04-13 23:48:24,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 280 transitions, 5579 flow [2025-04-13 23:48:24,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 280 transitions, 5215 flow, removed 139 selfloop flow, removed 13 redundant places. [2025-04-13 23:48:24,981 INFO L231 Difference]: Finished difference. Result has 218 places, 166 transitions, 3482 flow [2025-04-13 23:48:24,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3482, PETRI_PLACES=218, PETRI_TRANSITIONS=166} [2025-04-13 23:48:24,981 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 196 predicate places. [2025-04-13 23:48:24,981 INFO L485 AbstractCegarLoop]: Abstraction has has 218 places, 166 transitions, 3482 flow [2025-04-13 23:48:24,981 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:24,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:24,981 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:24,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-13 23:48:25,182 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-13 23:48:25,182 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:25,182 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1557516458, now seen corresponding path program 8 times [2025-04-13 23:48:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:25,183 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188334684] [2025-04-13 23:48:25,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:25,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:25,190 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:25,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:25,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:25,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:25,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188334684] [2025-04-13 23:48:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188334684] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:25,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404309430] [2025-04-13 23:48:25,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:25,307 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) [2025-04-13 23:48:25,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-13 23:48:25,340 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:25,354 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:25,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:25,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:25,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:25,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:25,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:25,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404309430] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:25,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:25,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-04-13 23:48:25,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216497195] [2025-04-13 23:48:25,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:25,501 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:25,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:25,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:25,502 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:25,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 166 transitions, 3482 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:25,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:25,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:25,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:26,093 INFO L116 PetriNetUnfolderBase]: 1804/3198 cut-off events. [2025-04-13 23:48:26,093 INFO L117 PetriNetUnfolderBase]: For 227054/227054 co-relation queries the response was YES. [2025-04-13 23:48:26,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26849 conditions, 3198 events. 1804/3198 cut-off events. For 227054/227054 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 16958 event pairs, 215 based on Foata normal form. 27/2325 useless extension candidates. Maximal degree in co-relation 26757. Up to 859 conditions per place. [2025-04-13 23:48:26,114 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 115 selfloop transitions, 124 changer transitions 53/292 dead transitions. [2025-04-13 23:48:26,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 292 transitions, 6168 flow [2025-04-13 23:48:26,114 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 23:48:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 23:48:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2025-04-13 23:48:26,115 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2025-04-13 23:48:26,115 INFO L175 Difference]: Start difference. First operand has 218 places, 166 transitions, 3482 flow. Second operand 23 states and 205 transitions. [2025-04-13 23:48:26,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 292 transitions, 6168 flow [2025-04-13 23:48:26,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 292 transitions, 5814 flow, removed 131 selfloop flow, removed 15 redundant places. [2025-04-13 23:48:26,437 INFO L231 Difference]: Finished difference. Result has 231 places, 177 transitions, 3978 flow [2025-04-13 23:48:26,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3978, PETRI_PLACES=231, PETRI_TRANSITIONS=177} [2025-04-13 23:48:26,438 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 209 predicate places. [2025-04-13 23:48:26,438 INFO L485 AbstractCegarLoop]: Abstraction has has 231 places, 177 transitions, 3978 flow [2025-04-13 23:48:26,438 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:26,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:26,438 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:26,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:26,638 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-13 23:48:26,638 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:26,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1804145330, now seen corresponding path program 9 times [2025-04-13 23:48:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:26,639 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032780218] [2025-04-13 23:48:26,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:48:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:26,642 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-04-13 23:48:26,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:26,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-04-13 23:48:26,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:26,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032780218] [2025-04-13 23:48:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032780218] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:26,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948434191] [2025-04-13 23:48:26,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:48:26,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:26,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:26,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-13 23:48:26,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 5 equivalence classes. [2025-04-13 23:48:26,835 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:26,835 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-04-13 23:48:26,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:26,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:26,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:26,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948434191] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:26,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-04-13 23:48:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031981490] [2025-04-13 23:48:26,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:26,958 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 23:48:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:26,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 23:48:26,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2025-04-13 23:48:26,959 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:26,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 177 transitions, 3978 flow. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:26,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:26,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:26,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:27,637 INFO L116 PetriNetUnfolderBase]: 1894/3378 cut-off events. [2025-04-13 23:48:27,637 INFO L117 PetriNetUnfolderBase]: For 257616/257616 co-relation queries the response was YES. [2025-04-13 23:48:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29185 conditions, 3378 events. 1894/3378 cut-off events. For 257616/257616 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18348 event pairs, 161 based on Foata normal form. 27/2445 useless extension candidates. Maximal degree in co-relation 29087. Up to 898 conditions per place. [2025-04-13 23:48:27,660 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 118 selfloop transitions, 141 changer transitions 55/314 dead transitions. [2025-04-13 23:48:27,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 314 transitions, 6848 flow [2025-04-13 23:48:27,660 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-13 23:48:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-13 23:48:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2025-04-13 23:48:27,661 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2025-04-13 23:48:27,661 INFO L175 Difference]: Start difference. First operand has 231 places, 177 transitions, 3978 flow. Second operand 26 states and 229 transitions. [2025-04-13 23:48:27,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 314 transitions, 6848 flow [2025-04-13 23:48:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 314 transitions, 6364 flow, removed 170 selfloop flow, removed 16 redundant places. [2025-04-13 23:48:28,030 INFO L231 Difference]: Finished difference. Result has 245 places, 188 transitions, 4415 flow [2025-04-13 23:48:28,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4415, PETRI_PLACES=245, PETRI_TRANSITIONS=188} [2025-04-13 23:48:28,030 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 223 predicate places. [2025-04-13 23:48:28,030 INFO L485 AbstractCegarLoop]: Abstraction has has 245 places, 188 transitions, 4415 flow [2025-04-13 23:48:28,030 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:28,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:28,030 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:28,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:28,231 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-13 23:48:28,231 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:28,232 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1927590182, now seen corresponding path program 10 times [2025-04-13 23:48:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:28,232 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998756255] [2025-04-13 23:48:28,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:28,235 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:28,242 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:28,243 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:28,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:28,411 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998756255] [2025-04-13 23:48:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998756255] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:28,411 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032009910] [2025-04-13 23:48:28,411 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:48:28,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:28,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:28,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-13 23:48:28,446 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-04-13 23:48:28,458 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:28,459 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:48:28,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:28,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:28,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:28,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032009910] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:28,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:28,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-04-13 23:48:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912047670] [2025-04-13 23:48:28,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:28,591 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:28,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:28,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:28,591 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:28,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 188 transitions, 4415 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:28,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:28,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:28,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:29,406 INFO L116 PetriNetUnfolderBase]: 1966/3522 cut-off events. [2025-04-13 23:48:29,406 INFO L117 PetriNetUnfolderBase]: For 278645/278645 co-relation queries the response was YES. [2025-04-13 23:48:29,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30923 conditions, 3522 events. 1966/3522 cut-off events. For 278645/278645 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 19487 event pairs, 131 based on Foata normal form. 27/2541 useless extension candidates. Maximal degree in co-relation 30820. Up to 934 conditions per place. [2025-04-13 23:48:29,426 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 114 selfloop transitions, 153 changer transitions 57/324 dead transitions. [2025-04-13 23:48:29,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 324 transitions, 7349 flow [2025-04-13 23:48:29,427 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 23:48:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 23:48:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 225 transitions. [2025-04-13 23:48:29,428 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-04-13 23:48:29,428 INFO L175 Difference]: Start difference. First operand has 245 places, 188 transitions, 4415 flow. Second operand 25 states and 225 transitions. [2025-04-13 23:48:29,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 324 transitions, 7349 flow [2025-04-13 23:48:29,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 324 transitions, 6817 flow, removed 174 selfloop flow, removed 20 redundant places. [2025-04-13 23:48:29,803 INFO L231 Difference]: Finished difference. Result has 253 places, 197 transitions, 4766 flow [2025-04-13 23:48:29,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4766, PETRI_PLACES=253, PETRI_TRANSITIONS=197} [2025-04-13 23:48:29,803 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 231 predicate places. [2025-04-13 23:48:29,803 INFO L485 AbstractCegarLoop]: Abstraction has has 253 places, 197 transitions, 4766 flow [2025-04-13 23:48:29,803 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:29,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:29,804 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:30,006 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:30,006 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:30,006 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1008898870, now seen corresponding path program 11 times [2025-04-13 23:48:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:30,007 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902940252] [2025-04-13 23:48:30,007 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:30,010 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 7 equivalence classes. [2025-04-13 23:48:30,013 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:30,013 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-04-13 23:48:30,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:30,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:30,138 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902940252] [2025-04-13 23:48:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902940252] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:30,138 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930133906] [2025-04-13 23:48:30,138 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:48:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:30,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:30,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-13 23:48:30,173 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 7 equivalence classes. [2025-04-13 23:48:30,185 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:30,185 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-04-13 23:48:30,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:30,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:30,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:30,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:30,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930133906] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:30,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:30,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-04-13 23:48:30,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179948251] [2025-04-13 23:48:30,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:30,305 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 23:48:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:30,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 23:48:30,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-04-13 23:48:30,305 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 197 transitions, 4766 flow. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:31,210 INFO L116 PetriNetUnfolderBase]: 2065/3702 cut-off events. [2025-04-13 23:48:31,211 INFO L117 PetriNetUnfolderBase]: For 300384/300384 co-relation queries the response was YES. [2025-04-13 23:48:31,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32747 conditions, 3702 events. 2065/3702 cut-off events. For 300384/300384 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 20676 event pairs, 71 based on Foata normal form. 27/2667 useless extension candidates. Maximal degree in co-relation 32640. Up to 976 conditions per place. [2025-04-13 23:48:31,240 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 119 selfloop transitions, 169 changer transitions 57/345 dead transitions. [2025-04-13 23:48:31,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 345 transitions, 7835 flow [2025-04-13 23:48:31,240 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-13 23:48:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-13 23:48:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 249 transitions. [2025-04-13 23:48:31,241 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2025-04-13 23:48:31,241 INFO L175 Difference]: Start difference. First operand has 253 places, 197 transitions, 4766 flow. Second operand 28 states and 249 transitions. [2025-04-13 23:48:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 345 transitions, 7835 flow [2025-04-13 23:48:31,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 345 transitions, 7263 flow, removed 176 selfloop flow, removed 20 redundant places. [2025-04-13 23:48:31,810 INFO L231 Difference]: Finished difference. Result has 264 places, 207 transitions, 5092 flow [2025-04-13 23:48:31,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5092, PETRI_PLACES=264, PETRI_TRANSITIONS=207} [2025-04-13 23:48:31,811 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 242 predicate places. [2025-04-13 23:48:31,811 INFO L485 AbstractCegarLoop]: Abstraction has has 264 places, 207 transitions, 5092 flow [2025-04-13 23:48:31,811 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:31,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:31,811 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:31,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-13 23:48:32,012 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2025-04-13 23:48:32,012 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:32,013 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash -141985892, now seen corresponding path program 12 times [2025-04-13 23:48:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:32,013 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272027486] [2025-04-13 23:48:32,013 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 23:48:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:32,017 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 8 equivalence classes. [2025-04-13 23:48:32,023 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:32,023 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-04-13 23:48:32,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:32,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:32,139 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272027486] [2025-04-13 23:48:32,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272027486] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:32,139 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192040348] [2025-04-13 23:48:32,139 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 23:48:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:32,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:32,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-13 23:48:32,169 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 8 equivalence classes. [2025-04-13 23:48:32,180 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:32,180 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-04-13 23:48:32,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:32,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:32,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:32,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192040348] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:32,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:32,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-04-13 23:48:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199491785] [2025-04-13 23:48:32,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:32,285 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:48:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:32,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:48:32,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:48:32,286 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:32,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 207 transitions, 5092 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:32,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:33,077 INFO L116 PetriNetUnfolderBase]: 2236/3990 cut-off events. [2025-04-13 23:48:33,077 INFO L117 PetriNetUnfolderBase]: For 345042/345042 co-relation queries the response was YES. [2025-04-13 23:48:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36323 conditions, 3990 events. 2236/3990 cut-off events. For 345042/345042 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22360 event pairs, 59 based on Foata normal form. 27/2877 useless extension candidates. Maximal degree in co-relation 36212. Up to 1042 conditions per place. [2025-04-13 23:48:33,109 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 128 selfloop transitions, 177 changer transitions 53/358 dead transitions. [2025-04-13 23:48:33,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 358 transitions, 8432 flow [2025-04-13 23:48:33,109 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 23:48:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 23:48:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 249 transitions. [2025-04-13 23:48:33,110 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2025-04-13 23:48:33,110 INFO L175 Difference]: Start difference. First operand has 264 places, 207 transitions, 5092 flow. Second operand 27 states and 249 transitions. [2025-04-13 23:48:33,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 358 transitions, 8432 flow [2025-04-13 23:48:33,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 358 transitions, 7843 flow, removed 192 selfloop flow, removed 21 redundant places. [2025-04-13 23:48:33,720 INFO L231 Difference]: Finished difference. Result has 273 places, 215 transitions, 5499 flow [2025-04-13 23:48:33,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5499, PETRI_PLACES=273, PETRI_TRANSITIONS=215} [2025-04-13 23:48:33,720 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 251 predicate places. [2025-04-13 23:48:33,720 INFO L485 AbstractCegarLoop]: Abstraction has has 273 places, 215 transitions, 5499 flow [2025-04-13 23:48:33,720 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:33,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:33,721 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:33,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-04-13 23:48:33,921 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:33,921 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:33,922 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -997684000, now seen corresponding path program 13 times [2025-04-13 23:48:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:33,922 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289173467] [2025-04-13 23:48:33,922 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 23:48:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:33,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 23:48:33,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:33,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:33,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:34,054 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289173467] [2025-04-13 23:48:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289173467] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:34,054 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341081037] [2025-04-13 23:48:34,054 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 23:48:34,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:34,057 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:34,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-13 23:48:34,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 23:48:34,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 23:48:34,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:48:34,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:34,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:48:34,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:34,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:48:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:48:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341081037] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:48:34,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:48:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-04-13 23:48:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973054683] [2025-04-13 23:48:34,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:48:34,213 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 23:48:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:34,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 23:48:34,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-04-13 23:48:34,214 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:34,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 215 transitions, 5499 flow. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:34,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:34,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:35,110 INFO L116 PetriNetUnfolderBase]: 2182/3918 cut-off events. [2025-04-13 23:48:35,110 INFO L117 PetriNetUnfolderBase]: For 358678/358678 co-relation queries the response was YES. [2025-04-13 23:48:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36221 conditions, 3918 events. 2182/3918 cut-off events. For 358678/358678 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22062 event pairs, 65 based on Foata normal form. 45/2835 useless extension candidates. Maximal degree in co-relation 36105. Up to 1018 conditions per place. [2025-04-13 23:48:35,145 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 119 selfloop transitions, 180 changer transitions 61/360 dead transitions. [2025-04-13 23:48:35,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 360 transitions, 8731 flow [2025-04-13 23:48:35,146 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-13 23:48:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-13 23:48:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 251 transitions. [2025-04-13 23:48:35,147 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4268707482993197 [2025-04-13 23:48:35,147 INFO L175 Difference]: Start difference. First operand has 273 places, 215 transitions, 5499 flow. Second operand 28 states and 251 transitions. [2025-04-13 23:48:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 360 transitions, 8731 flow [2025-04-13 23:48:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 360 transitions, 7969 flow, removed 246 selfloop flow, removed 22 redundant places. [2025-04-13 23:48:35,814 INFO L231 Difference]: Finished difference. Result has 280 places, 217 transitions, 5533 flow [2025-04-13 23:48:35,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5533, PETRI_PLACES=280, PETRI_TRANSITIONS=217} [2025-04-13 23:48:35,815 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 258 predicate places. [2025-04-13 23:48:35,815 INFO L485 AbstractCegarLoop]: Abstraction has has 280 places, 217 transitions, 5533 flow [2025-04-13 23:48:35,815 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:35,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:48:35,816 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:48:35,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-13 23:48:36,016 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:36,016 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:48:36,017 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:48:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1363195779, now seen corresponding path program 14 times [2025-04-13 23:48:36,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:48:36,017 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597226598] [2025-04-13 23:48:36,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:48:36,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-04-13 23:48:36,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-04-13 23:48:36,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:36,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 23:48:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:48:36,063 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597226598] [2025-04-13 23:48:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597226598] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:48:36,063 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932264297] [2025-04-13 23:48:36,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:48:36,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:48:36,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:48:36,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:48:36,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-13 23:48:36,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-04-13 23:48:36,110 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-04-13 23:48:36,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:48:36,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:48:36,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-13 23:48:36,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:48:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 23:48:36,135 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 23:48:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932264297] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:48:36,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 23:48:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2025-04-13 23:48:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879825577] [2025-04-13 23:48:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:48:36,136 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:48:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:48:36,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:48:36,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2025-04-13 23:48:36,136 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 23:48:36,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 217 transitions, 5533 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:36,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:48:36,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 23:48:36,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:48:37,018 INFO L116 PetriNetUnfolderBase]: 3678/6321 cut-off events. [2025-04-13 23:48:37,018 INFO L117 PetriNetUnfolderBase]: For 447927/447927 co-relation queries the response was YES. [2025-04-13 23:48:37,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 6321 events. 3678/6321 cut-off events. For 447927/447927 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 40009 event pairs, 156 based on Foata normal form. 0/4671 useless extension candidates. Maximal degree in co-relation 49022. Up to 1945 conditions per place. [2025-04-13 23:48:37,053 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 0 selfloop transitions, 0 changer transitions 584/584 dead transitions. [2025-04-13 23:48:37,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 584 transitions, 13991 flow [2025-04-13 23:48:37,053 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 23:48:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 23:48:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2025-04-13 23:48:37,054 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2025-04-13 23:48:37,054 INFO L175 Difference]: Start difference. First operand has 280 places, 217 transitions, 5533 flow. Second operand 7 states and 80 transitions. [2025-04-13 23:48:37,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 584 transitions, 13991 flow [2025-04-13 23:48:37,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 584 transitions, 12013 flow, removed 412 selfloop flow, removed 32 redundant places. [2025-04-13 23:48:37,547 INFO L231 Difference]: Finished difference. Result has 249 places, 0 transitions, 0 flow [2025-04-13 23:48:37,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=249, PETRI_TRANSITIONS=0} [2025-04-13 23:48:37,547 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2025-04-13 23:48:37,547 INFO L485 AbstractCegarLoop]: Abstraction has has 249 places, 0 transitions, 0 flow [2025-04-13 23:48:37,547 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:48:37,550 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 23:48:37,550 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 23:48:37,550 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 23:48:37,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-13 23:48:37,754 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-04-13 23:48:37,754 INFO L422 BasicCegarLoop]: Path program histogram: [14, 3, 2, 2, 1, 1] [2025-04-13 23:48:37,757 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 23:48:37,757 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 23:48:37,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 11:48:37 BasicIcfg [2025-04-13 23:48:37,761 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 23:48:37,761 INFO L158 Benchmark]: Toolchain (without parser) took 27240.65ms. Allocated memory was 142.6MB in the beginning and 981.5MB in the end (delta: 838.9MB). Free memory was 100.5MB in the beginning and 349.0MB in the end (delta: -248.5MB). Peak memory consumption was 829.2MB. Max. memory is 8.0GB. [2025-04-13 23:48:37,762 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 155.2MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 23:48:37,762 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.83ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 77.7MB in the end (delta: 22.9MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 23:48:37,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.24ms. Allocated memory is still 142.6MB. Free memory was 77.7MB in the beginning and 76.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 23:48:37,762 INFO L158 Benchmark]: Boogie Preprocessor took 37.61ms. Allocated memory is still 142.6MB. Free memory was 76.2MB in the beginning and 74.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 23:48:37,762 INFO L158 Benchmark]: IcfgBuilder took 298.29ms. Allocated memory is still 142.6MB. Free memory was 74.7MB in the beginning and 53.8MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-13 23:48:37,764 INFO L158 Benchmark]: TraceAbstraction took 26507.69ms. Allocated memory was 142.6MB in the beginning and 981.5MB in the end (delta: 838.9MB). Free memory was 53.3MB in the beginning and 349.0MB in the end (delta: -295.7MB). Peak memory consumption was 783.1MB. Max. memory is 8.0GB. [2025-04-13 23:48:37,765 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 155.2MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 365.83ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 77.7MB in the end (delta: 22.9MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.24ms. Allocated memory is still 142.6MB. Free memory was 77.7MB in the beginning and 76.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 37.61ms. Allocated memory is still 142.6MB. Free memory was 76.2MB in the beginning and 74.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 298.29ms. Allocated memory is still 142.6MB. Free memory was 74.7MB in the beginning and 53.8MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 26507.69ms. Allocated memory was 142.6MB in the beginning and 981.5MB in the end (delta: 838.9MB). Free memory was 53.3MB in the beginning and 349.0MB in the end (delta: -295.7MB). Peak memory consumption was 783.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 33 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 26.4s, OverallIterations: 23, TraceHistogramMax: 6, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 17.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4720 SdHoareTripleChecker+Valid, 3.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4720 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 278 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6309 IncrementalHoareTripleChecker+Invalid, 6587 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 278 mSolverCounterUnsat, 0 mSDtfsCounter, 6309 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 638 SyntacticMatches, 53 SemanticMatches, 567 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4137 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5533occurred in iteration=22, InterpolantAutomatonStates: 450, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 866 NumberOfCodeBlocks, 866 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1176 ConstructedInterpolants, 0 QuantifiedInterpolants, 5099 SizeOfPredicates, 137 NumberOfNonLiveVariables, 1833 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 54 InterpolantComputations, 8 PerfectInterpolantSequences, 122/1282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 23:48:37,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...