/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.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread-lit/sssc12_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:37:55,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:37:55,317 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 19:37:55,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:37:55,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:37:55,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:37:55,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:37:55,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:37:55,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:37:55,346 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:37:55,347 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:37:55,347 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:37:55,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:37:55,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:37:55,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:37:55,349 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:55,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:55,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:55,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:37:55,350 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:37:55,350 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 [2025-04-13 19:37:55,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:37:55,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:37:55,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:37:55,560 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:37:55,562 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:37:55,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2025-04-13 19:37:56,891 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85b563ce/25eaaf27bcbd45eab58c931e467b59f2/FLAG88cbdc9d9 [2025-04-13 19:37:57,159 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:37:57,159 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2025-04-13 19:37:57,176 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85b563ce/25eaaf27bcbd45eab58c931e467b59f2/FLAG88cbdc9d9 [2025-04-13 19:37:57,891 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85b563ce/25eaaf27bcbd45eab58c931e467b59f2 [2025-04-13 19:37:57,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:37:57,894 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:37:57,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:57,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:37:57,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:37:57,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:57" (1/1) ... [2025-04-13 19:37:57,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b5dfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:57, skipping insertion in model container [2025-04-13 19:37:57,899 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:57" (1/1) ... [2025-04-13 19:37:57,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:37:58,207 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-lit/sssc12_variant.i[47777,47790] [2025-04-13 19:37:58,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:58,227 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:37:58,272 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-lit/sssc12_variant.i[47777,47790] [2025-04-13 19:37:58,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:58,319 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:37:58,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58 WrapperNode [2025-04-13 19:37:58,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:58,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:58,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:37:58,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:37:58,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,350 INFO L138 Inliner]: procedures = 272, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2025-04-13 19:37:58,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:58,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:37:58,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:37:58,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:37:58,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,369 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 3, 5]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 2 writes are split as follows [0, 2, 0]. [2025-04-13 19:37:58,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,378 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:37:58,393 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:37:58,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:37:58,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:37:58,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (1/1) ... [2025-04-13 19:37:58,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:37:58,416 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 19:37:58,421 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 19:37:58,434 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2025-04-13 19:37:58,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:37:58,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:37:58,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:37:58,437 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:37:58,533 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:37:58,534 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:37:58,655 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:37:58,656 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:37:58,656 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:37:58,770 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:37:58,774 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:37:58,784 INFO L313 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-13 19:37:58,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:58 BoogieIcfgContainer [2025-04-13 19:37:58,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:37:58,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:37:58,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:37:58,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:37:58,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:37:57" (1/3) ... [2025-04-13 19:37:58,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f19a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:58, skipping insertion in model container [2025-04-13 19:37:58,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:58" (2/3) ... [2025-04-13 19:37:58,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f19a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:58, skipping insertion in model container [2025-04-13 19:37:58,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:58" (3/3) ... [2025-04-13 19:37:58,791 INFO L128 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2025-04-13 19:37:58,800 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:37:58,802 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sssc12_variant.i that has 2 procedures, 11 locations, 12 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 19:37:58,802 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:37:58,838 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:58,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 15 places, 16 transitions, 36 flow [2025-04-13 19:37:58,901 INFO L116 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-04-13 19:37:58,902 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:58,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2025-04-13 19:37:58,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 15 places, 16 transitions, 36 flow [2025-04-13 19:37:58,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 15 transitions, 34 flow [2025-04-13 19:37:58,915 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:58,925 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:58,925 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:37:58,932 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:58,933 INFO L116 PetriNetUnfolderBase]: 0/5 cut-off events. [2025-04-13 19:37:58,933 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:58,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:58,933 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-13 19:37:58,934 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-13 19:37:58,938 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 7100460, now seen corresponding path program 1 times [2025-04-13 19:37:58,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:58,944 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356698737] [2025-04-13 19:37:58,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:59,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:37:59,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:37:59,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,033 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:37:59,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:37:59,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:37:59,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,069 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:37:59,070 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:37:59,071 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 19:37:59,072 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 19:37:59,073 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2025-04-13 19:37:59,073 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:37:59,073 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:37:59,076 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:37:59,076 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 19:37:59,102 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:59,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 27 transitions, 64 flow [2025-04-13 19:37:59,114 INFO L116 PetriNetUnfolderBase]: 6/29 cut-off events. [2025-04-13 19:37:59,114 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:37:59,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 29 events. 6/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 3 conditions per place. [2025-04-13 19:37:59,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 27 transitions, 64 flow [2025-04-13 19:37:59,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 26 transitions, 62 flow [2025-04-13 19:37:59,118 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:59,118 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:59,118 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 19:37:59,124 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:59,124 INFO L116 PetriNetUnfolderBase]: 0/11 cut-off events. [2025-04-13 19:37:59,124 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:37:59,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:59,124 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-04-13 19:37:59,124 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 19:37:59,125 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -958386110, now seen corresponding path program 1 times [2025-04-13 19:37:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:59,125 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279429668] [2025-04-13 19:37:59,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:59,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:37:59,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:37:59,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,153 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:37:59,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:37:59,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:37:59,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:37:59,175 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:37:59,175 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-04-13 19:37:59,175 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-04-13 19:37:59,175 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-04-13 19:37:59,176 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-13 19:37:59,176 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:37:59,176 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:37:59,176 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:37:59,176 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 19:37:59,199 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:59,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 38 transitions, 94 flow [2025-04-13 19:37:59,212 INFO L116 PetriNetUnfolderBase]: 9/42 cut-off events. [2025-04-13 19:37:59,212 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 19:37:59,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 9/42 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 88 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2025-04-13 19:37:59,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 38 transitions, 94 flow [2025-04-13 19:37:59,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 37 transitions, 92 flow [2025-04-13 19:37:59,213 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:59,214 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:59,214 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 19:37:59,221 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:59,221 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 19:37:59,221 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 19:37:59,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:59,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:59,222 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:37:59,223 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1141135820, now seen corresponding path program 1 times [2025-04-13 19:37:59,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:59,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025827069] [2025-04-13 19:37:59,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:59,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:37:59,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:37:59,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:59,422 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 19:37:59,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:59,422 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025827069] [2025-04-13 19:37:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025827069] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:59,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:59,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:37:59,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880593143] [2025-04-13 19:37:59,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:59,427 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:37:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:59,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:37:59,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:37:59,444 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 38 [2025-04-13 19:37:59,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:37:59,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:59,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 38 [2025-04-13 19:37:59,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:59,822 INFO L116 PetriNetUnfolderBase]: 2250/3059 cut-off events. [2025-04-13 19:37:59,822 INFO L117 PetriNetUnfolderBase]: For 332/332 co-relation queries the response was YES. [2025-04-13 19:37:59,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6332 conditions, 3059 events. 2250/3059 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10958 event pairs, 1602 based on Foata normal form. 0/2411 useless extension candidates. Maximal degree in co-relation 2088. Up to 3050 conditions per place. [2025-04-13 19:37:59,842 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 29 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2025-04-13 19:37:59,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 136 flow [2025-04-13 19:37:59,844 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:37:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:37:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2025-04-13 19:37:59,852 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:37:59,854 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 92 flow. Second operand 2 states and 38 transitions. [2025-04-13 19:37:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 136 flow [2025-04-13 19:37:59,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 134 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-04-13 19:37:59,860 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 76 flow [2025-04-13 19:37:59,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2025-04-13 19:37:59,865 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2025-04-13 19:37:59,865 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 76 flow [2025-04-13 19:37:59,865 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:37:59,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:59,865 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2025-04-13 19:37:59,866 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:37:59,866 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 19:37:59,866 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash 700162925, now seen corresponding path program 1 times [2025-04-13 19:37:59,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:59,866 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576103497] [2025-04-13 19:37:59,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:59,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:59,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:37:59,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:37:59,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,887 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:37:59,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:37:59,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:37:59,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:37:59,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:37:59,903 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:37:59,904 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-04-13 19:37:59,904 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-13 19:37:59,904 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-04-13 19:37:59,904 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-04-13 19:37:59,904 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 19:37:59,904 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:37:59,904 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-13 19:37:59,909 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:37:59,909 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-13 19:37:59,945 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 49 transitions, 126 flow [2025-04-13 19:37:59,954 INFO L116 PetriNetUnfolderBase]: 12/55 cut-off events. [2025-04-13 19:37:59,954 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 19:37:59,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 55 events. 12/55 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 115 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 54. Up to 5 conditions per place. [2025-04-13 19:37:59,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 49 transitions, 126 flow [2025-04-13 19:37:59,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 48 transitions, 124 flow [2025-04-13 19:37:59,956 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:59,956 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:59,956 INFO L341 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-04-13 19:37:59,959 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:59,959 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 19:37:59,959 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 19:37:59,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:59,959 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:59,960 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-04-13 19:37:59,960 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash -879943213, now seen corresponding path program 1 times [2025-04-13 19:37:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:59,960 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015622089] [2025-04-13 19:37:59,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:59,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:37:59,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:37:59,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:59,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:38:00,071 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 19:38:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:38:00,072 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015622089] [2025-04-13 19:38:00,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015622089] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:38:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:38:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:38:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640110322] [2025-04-13 19:38:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:38:00,072 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:38:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:38:00,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:38:00,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:38:00,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 49 [2025-04-13 19:38:00,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:38:00,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:38:00,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 49 [2025-04-13 19:38:00,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:38:01,719 INFO L116 PetriNetUnfolderBase]: 22144/27801 cut-off events. [2025-04-13 19:38:01,719 INFO L117 PetriNetUnfolderBase]: For 4041/4041 co-relation queries the response was YES. [2025-04-13 19:38:01,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57486 conditions, 27801 events. 22144/27801 cut-off events. For 4041/4041 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 112187 event pairs, 16008 based on Foata normal form. 0/21665 useless extension candidates. Maximal degree in co-relation 6382. Up to 27746 conditions per place. [2025-04-13 19:38:01,889 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 38 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2025-04-13 19:38:01,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 182 flow [2025-04-13 19:38:01,890 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:38:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:38:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 49 transitions. [2025-04-13 19:38:01,891 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:38:01,891 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 124 flow. Second operand 2 states and 49 transitions. [2025-04-13 19:38:01,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 182 flow [2025-04-13 19:38:01,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 176 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-04-13 19:38:01,894 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 100 flow [2025-04-13 19:38:01,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2025-04-13 19:38:01,897 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2025-04-13 19:38:01,897 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 100 flow [2025-04-13 19:38:01,897 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:38:01,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:38:01,897 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2025-04-13 19:38:01,897 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 19:38:01,897 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-04-13 19:38:01,898 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:38:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash 22163981, now seen corresponding path program 1 times [2025-04-13 19:38:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:38:01,899 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309068724] [2025-04-13 19:38:01,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:38:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:38:01,908 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:38:01,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:38:01,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:01,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:38:01,919 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:38:01,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:38:01,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:38:01,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:01,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:38:01,935 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:38:01,935 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:38:01,935 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-04-13 19:38:01,935 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-04-13 19:38:01,936 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-04-13 19:38:01,936 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-04-13 19:38:01,936 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-04-13 19:38:01,936 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-04-13 19:38:01,936 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 19:38:01,936 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-13 19:38:01,936 WARN L247 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:38:01,936 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-04-13 19:38:01,974 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:38:01,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 60 transitions, 160 flow [2025-04-13 19:38:01,987 INFO L116 PetriNetUnfolderBase]: 15/68 cut-off events. [2025-04-13 19:38:01,987 INFO L117 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-04-13 19:38:01,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 68 events. 15/68 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2025-04-13 19:38:01,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 60 transitions, 160 flow [2025-04-13 19:38:01,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 59 transitions, 158 flow [2025-04-13 19:38:01,989 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:38:01,991 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:38:01,991 INFO L341 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-04-13 19:38:01,993 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:38:01,993 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 19:38:01,993 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 19:38:01,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:38:01,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:38:01,993 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2025-04-13 19:38:01,993 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:38:01,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1383912231, now seen corresponding path program 1 times [2025-04-13 19:38:01,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:38:01,994 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7175908] [2025-04-13 19:38:01,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:38:01,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:38:02,002 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:38:02,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:38:02,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:02,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:38:02,075 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 19:38:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:38:02,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7175908] [2025-04-13 19:38:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7175908] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:38:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:38:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:38:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491553857] [2025-04-13 19:38:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:38:02,076 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:38:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:38:02,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:38:02,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:38:02,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 60 [2025-04-13 19:38:02,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:38:02,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:38:02,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 60 [2025-04-13 19:38:02,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:38:13,312 INFO L116 PetriNetUnfolderBase]: 199818/239425 cut-off events. [2025-04-13 19:38:13,313 INFO L117 PetriNetUnfolderBase]: For 43360/43360 co-relation queries the response was YES. [2025-04-13 19:38:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494805 conditions, 239425 events. 199818/239425 cut-off events. For 43360/43360 co-relation queries the response was YES. Maximal size of possible extension queue 3589. Compared 1043171 event pairs, 145662 based on Foata normal form. 0/185269 useless extension candidates. Maximal degree in co-relation 57880. Up to 239034 conditions per place. [2025-04-13 19:38:14,372 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 47 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2025-04-13 19:38:14,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 230 flow [2025-04-13 19:38:14,373 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:38:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:38:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2025-04-13 19:38:14,374 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:38:14,374 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 158 flow. Second operand 2 states and 60 transitions. [2025-04-13 19:38:14,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 230 flow [2025-04-13 19:38:14,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 218 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-04-13 19:38:14,392 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 124 flow [2025-04-13 19:38:14,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2025-04-13 19:38:14,392 INFO L279 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2025-04-13 19:38:14,393 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 124 flow [2025-04-13 19:38:14,393 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:38:14,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:38:14,393 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:38:14,393 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 19:38:14,393 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2025-04-13 19:38:14,393 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:38:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2142952578, now seen corresponding path program 1 times [2025-04-13 19:38:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:38:14,393 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29740870] [2025-04-13 19:38:14,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:38:14,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:38:14,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:38:14,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:38:14,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:14,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:38:14,407 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:38:14,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:38:14,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:38:14,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:14,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:38:14,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:38:14,422 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-04-13 19:38:14,422 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-04-13 19:38:14,422 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 19:38:14,422 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-13 19:38:14,423 WARN L247 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:38:14,423 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2025-04-13 19:38:14,461 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:38:14,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 71 transitions, 196 flow [2025-04-13 19:38:14,471 INFO L116 PetriNetUnfolderBase]: 18/81 cut-off events. [2025-04-13 19:38:14,472 INFO L117 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-04-13 19:38:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 81 events. 18/81 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 201 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 93. Up to 7 conditions per place. [2025-04-13 19:38:14,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 71 transitions, 196 flow [2025-04-13 19:38:14,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 70 transitions, 194 flow [2025-04-13 19:38:14,474 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:38:14,474 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;@7164205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:38:14,474 INFO L341 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-04-13 19:38:14,478 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:38:14,478 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 19:38:14,478 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 19:38:14,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:38:14,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:38:14,479 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2025-04-13 19:38:14,479 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:38:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash -380314284, now seen corresponding path program 1 times [2025-04-13 19:38:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:38:14,479 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941238170] [2025-04-13 19:38:14,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:38:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:38:14,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 19:38:14,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 19:38:14,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:14,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:38:14,546 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 19:38:14,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:38:14,547 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941238170] [2025-04-13 19:38:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941238170] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:38:14,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:38:14,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 19:38:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486454721] [2025-04-13 19:38:14,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:38:14,548 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:38:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:38:14,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:38:14,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:38:14,549 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 71 [2025-04-13 19:38:14,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 19:38:14,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:38:14,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 71 [2025-04-13 19:38:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand