/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/fib_safe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:10:59,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:10:59,300 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 19:10:59,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:10:59,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:10:59,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:10:59,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:10:59,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:10:59,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:10:59,329 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:10:59,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:10:59,330 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:10:59,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:10:59,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:10:59,331 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:10:59,331 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:10:59,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:10:59,332 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 19:10:59,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:10:59,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:10:59,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:10:59,547 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:10:59,547 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:10:59,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-5.i [2025-04-13 19:11:00,825 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266cea7b5/833d74a73eaf4f0899ee260af645f1db/FLAG3e0f19746 [2025-04-13 19:11:01,049 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:11:01,050 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i [2025-04-13 19:11:01,060 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266cea7b5/833d74a73eaf4f0899ee260af645f1db/FLAG3e0f19746 [2025-04-13 19:11:01,876 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266cea7b5/833d74a73eaf4f0899ee260af645f1db [2025-04-13 19:11:01,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:11:01,879 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:11:01,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:01,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:11:01,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:11:01,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ceb8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:01, skipping insertion in model container [2025-04-13 19:11:01,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,904 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:11:02,188 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/fib_safe-5.i[30241,30254] [2025-04-13 19:11:02,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,219 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:11:02,269 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/fib_safe-5.i[30241,30254] [2025-04-13 19:11:02,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,299 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:11:02,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02 WrapperNode [2025-04-13 19:11:02,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:02,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:11:02,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:11:02,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,343 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 19:11:02,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:11:02,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:11:02,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,362 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 19:11:02,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,365 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:11:02,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:11:02,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:11:02,376 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:02,411 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 19:11:02,415 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 19:11:02,431 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:11:02,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:11:02,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:11:02,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:11:02,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:11:02,433 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 19:11:02,521 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:11:02,522 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:11:02,640 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:11:02,640 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:11:02,640 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:11:02,724 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,727 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,731 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:11:02,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02 BoogieIcfgContainer [2025-04-13 19:11:02,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:11:02,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:11:02,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:11:02,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:11:02,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:11:01" (1/3) ... [2025-04-13 19:11:02,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e4b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:02, skipping insertion in model container [2025-04-13 19:11:02,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (2/3) ... [2025-04-13 19:11:02,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e4b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:02, skipping insertion in model container [2025-04-13 19:11:02,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02" (3/3) ... [2025-04-13 19:11:02,741 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2025-04-13 19:11:02,752 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:11:02,753 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-5.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 19:11:02,754 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:11:02,791 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:11:02,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,839 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 19:11:02,841 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:02,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-04-13 19:11:02,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 19:11:02,851 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:11:02,861 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;@441b03fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:11:02,861 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:11:02,868 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:11:02,868 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 19:11:02,868 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:02,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:02,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:02,869 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 19:11:02,874 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1561770242, now seen corresponding path program 1 times [2025-04-13 19:11:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:02,881 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132130079] [2025-04-13 19:11:02,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:02,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 19:11:02,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:11:02,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:02,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,111 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 19:11:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,112 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132130079] [2025-04-13 19:11:03,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132130079] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:03,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:03,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:11:03,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239965799] [2025-04-13 19:11:03,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,119 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:11:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:11:03,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:11:03,138 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 19:11:03,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,234 INFO L116 PetriNetUnfolderBase]: 115/193 cut-off events. [2025-04-13 19:11:03,237 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 193 events. 115/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 564 event pairs, 20 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 368. Up to 118 conditions per place. [2025-04-13 19:11:03,241 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 20 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2025-04-13 19:11:03,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,243 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:11:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:11:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-13 19:11:03,251 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2025-04-13 19:11:03,252 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2025-04-13 19:11:03,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:11:03,259 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 19:11:03,264 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 19:11:03,264 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,264 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 19:11:03,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,264 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:11:03,264 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 19:11:03,265 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211856, now seen corresponding path program 1 times [2025-04-13 19:11:03,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,265 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219877912] [2025-04-13 19:11:03,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,360 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 19:11:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,360 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219877912] [2025-04-13 19:11:03,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219877912] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,361 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778472855] [2025-04-13 19:11:03,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,367 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 19:11:03,368 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 19:11:03,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:03,468 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 19:11:03,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:03,483 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 19:11:03,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778472855] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:03,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:03,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:11:03,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053755532] [2025-04-13 19:11:03,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,484 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:11:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:11:03,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:11:03,485 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 19:11:03,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,615 INFO L116 PetriNetUnfolderBase]: 151/247 cut-off events. [2025-04-13 19:11:03,615 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 247 events. 151/247 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 20 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 539. Up to 91 conditions per place. [2025-04-13 19:11:03,620 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2025-04-13 19:11:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,621 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:11:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:11:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-04-13 19:11:03,622 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-04-13 19:11:03,622 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 88 transitions. [2025-04-13 19:11:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:03,624 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-04-13 19:11:03,626 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 19:11:03,626 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,626 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 19:11:03,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,626 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,638 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 19:11:03,826 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,827 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 19:11:03,827 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 493351806, now seen corresponding path program 2 times [2025-04-13 19:11:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,827 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479326407] [2025-04-13 19:11:03,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,835 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:03,854 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:03,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:03,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,979 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479326407] [2025-04-13 19:11:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479326407] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,979 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827256117] [2025-04-13 19:11:03,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,981 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 19:11:03,983 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 19:11:04,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:04,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:04,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:04,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:11:04,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827256117] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:11:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406961077] [2025-04-13 19:11:04,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,135 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:11:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:11:04,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:11:04,136 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:11:04,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,302 INFO L116 PetriNetUnfolderBase]: 259/409 cut-off events. [2025-04-13 19:11:04,303 INFO L117 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-04-13 19:11:04,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 409 events. 259/409 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1224 event pairs, 20 based on Foata normal form. 54/373 useless extension candidates. Maximal degree in co-relation 1061. Up to 109 conditions per place. [2025-04-13 19:11:04,305 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 74 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2025-04-13 19:11:04,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,307 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:11:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:11:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-04-13 19:11:04,308 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-04-13 19:11:04,308 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 175 transitions. [2025-04-13 19:11:04,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 90 transitions, 402 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:04,311 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2025-04-13 19:11:04,315 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 19:11:04,316 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,316 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:11:04,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,316 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 19:11:04,516 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,SelfDestructingSolverStorable2 [2025-04-13 19:11:04,516 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 19:11:04,517 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1439646146, now seen corresponding path program 3 times [2025-04-13 19:11:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:04,517 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437556818] [2025-04-13 19:11:04,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:04,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,557 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:04,748 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437556818] [2025-04-13 19:11:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437556818] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:04,748 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9756170] [2025-04-13 19:11:04,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:04,750 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 19:11:04,751 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 19:11:04,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,813 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,813 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 19:11:04,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9756170] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-04-13 19:11:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54196189] [2025-04-13 19:11:04,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,949 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 19:11:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 19:11:04,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-04-13 19:11:04,950 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:04,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 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 19:11:04,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:04,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:05,124 INFO L116 PetriNetUnfolderBase]: 295/463 cut-off events. [2025-04-13 19:11:05,124 INFO L117 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2025-04-13 19:11:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 463 events. 295/463 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1392 event pairs, 20 based on Foata normal form. 18/379 useless extension candidates. Maximal degree in co-relation 1376. Up to 100 conditions per place. [2025-04-13 19:11:05,128 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 86 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2025-04-13 19:11:05,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 104 transitions, 518 flow [2025-04-13 19:11:05,129 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 19:11:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 19:11:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 199 transitions. [2025-04-13 19:11:05,131 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5685714285714286 [2025-04-13 19:11:05,131 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 14 states and 199 transitions. [2025-04-13 19:11:05,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 104 transitions, 518 flow [2025-04-13 19:11:05,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 466 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-04-13 19:11:05,138 INFO L231 Difference]: Finished difference. Result has 58 places, 32 transitions, 160 flow [2025-04-13 19:11:05,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=32} [2025-04-13 19:11:05,138 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2025-04-13 19:11:05,138 INFO L485 AbstractCegarLoop]: Abstraction has has 58 places, 32 transitions, 160 flow [2025-04-13 19:11:05,138 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 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 19:11:05,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:05,140 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:05,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 19:11:05,345 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:05,345 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 19:11:05,345 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -519664514, now seen corresponding path program 4 times [2025-04-13 19:11:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:05,346 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140990280] [2025-04-13 19:11:05,346 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:05,353 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 19:11:05,364 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:11:05,364 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:05,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:06,050 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140990280] [2025-04-13 19:11:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140990280] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:06,050 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943640869] [2025-04-13 19:11:06,050 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:06,053 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 19:11:06,057 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 19:11:06,092 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 19:11:06,110 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:11:06,110 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:06,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:06,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 19:11:06,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:06,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:07,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943640869] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:07,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:07,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2025-04-13 19:11:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558845466] [2025-04-13 19:11:07,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:07,406 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-04-13 19:11:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:07,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-04-13 19:11:07,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2025-04-13 19:11:07,460 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:07,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 32 transitions, 160 flow. Second operand has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 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 19:11:07,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:14,083 INFO L116 PetriNetUnfolderBase]: 8671/13135 cut-off events. [2025-04-13 19:11:14,083 INFO L117 PetriNetUnfolderBase]: For 24645/24645 co-relation queries the response was YES. [2025-04-13 19:11:14,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37519 conditions, 13135 events. 8671/13135 cut-off events. For 24645/24645 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 69205 event pairs, 40 based on Foata normal form. 232/11144 useless extension candidates. Maximal degree in co-relation 37489. Up to 1895 conditions per place. [2025-04-13 19:11:14,145 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 423 selfloop transitions, 455 changer transitions 164/1042 dead transitions. [2025-04-13 19:11:14,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1042 transitions, 6739 flow [2025-04-13 19:11:14,146 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2025-04-13 19:11:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2025-04-13 19:11:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 957 transitions. [2025-04-13 19:11:14,153 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3828 [2025-04-13 19:11:14,154 INFO L175 Difference]: Start difference. First operand has 58 places, 32 transitions, 160 flow. Second operand 100 states and 957 transitions. [2025-04-13 19:11:14,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 1042 transitions, 6739 flow [2025-04-13 19:11:14,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 1042 transitions, 5741 flow, removed 210 selfloop flow, removed 11 redundant places. [2025-04-13 19:11:14,221 INFO L231 Difference]: Finished difference. Result has 180 places, 534 transitions, 3176 flow [2025-04-13 19:11:14,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=3176, PETRI_PLACES=180, PETRI_TRANSITIONS=534} [2025-04-13 19:11:14,222 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 155 predicate places. [2025-04-13 19:11:14,222 INFO L485 AbstractCegarLoop]: Abstraction has has 180 places, 534 transitions, 3176 flow [2025-04-13 19:11:14,222 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 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 19:11:14,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:14,222 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:14,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 19:11:14,425 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:14,425 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 19:11:14,425 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash -675989848, now seen corresponding path program 1 times [2025-04-13 19:11:14,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:14,425 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133255585] [2025-04-13 19:11:14,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:14,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:14,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 19:11:14,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:14,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:14,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:15,048 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133255585] [2025-04-13 19:11:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133255585] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:15,048 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46679677] [2025-04-13 19:11:15,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:15,050 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 19:11:15,051 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 19:11:15,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 19:11:15,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:15,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:15,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:15,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 19:11:15,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:15,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46679677] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:16,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:16,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 56 [2025-04-13 19:11:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970779267] [2025-04-13 19:11:16,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:16,236 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-13 19:11:16,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:16,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-13 19:11:16,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2868, Unknown=0, NotChecked=0, Total=3306 [2025-04-13 19:11:16,379 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:16,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 534 transitions, 3176 flow. Second operand has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 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 19:11:16,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:16,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:52,544 INFO L116 PetriNetUnfolderBase]: 117680/178357 cut-off events. [2025-04-13 19:11:52,545 INFO L117 PetriNetUnfolderBase]: For 4880209/4880209 co-relation queries the response was YES. [2025-04-13 19:11:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781570 conditions, 178357 events. 117680/178357 cut-off events. For 4880209/4880209 co-relation queries the response was YES. Maximal size of possible extension queue 3044. Compared 1390629 event pairs, 5622 based on Foata normal form. 4032/151149 useless extension candidates. Maximal degree in co-relation 781504. Up to 25804 conditions per place. [2025-04-13 19:11:54,290 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1535 selfloop transitions, 6473 changer transitions 1497/9505 dead transitions. [2025-04-13 19:11:54,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 9505 transitions, 76205 flow [2025-04-13 19:11:54,291 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2025-04-13 19:11:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2025-04-13 19:11:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 2815 transitions. [2025-04-13 19:11:54,301 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3804054054054054 [2025-04-13 19:11:54,301 INFO L175 Difference]: Start difference. First operand has 180 places, 534 transitions, 3176 flow. Second operand 296 states and 2815 transitions. [2025-04-13 19:11:54,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 9505 transitions, 76205 flow [2025-04-13 19:20:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 9505 transitions, 69565 flow, removed 3293 selfloop flow, removed 32 redundant places. [2025-04-13 19:20:52,232 INFO L231 Difference]: Finished difference. Result has 564 places, 6962 transitions, 56491 flow [2025-04-13 19:20:52,233 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=296, PETRI_FLOW=56491, PETRI_PLACES=564, PETRI_TRANSITIONS=6962} [2025-04-13 19:20:52,234 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 539 predicate places. [2025-04-13 19:20:52,234 INFO L485 AbstractCegarLoop]: Abstraction has has 564 places, 6962 transitions, 56491 flow [2025-04-13 19:20:52,235 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 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 19:20:52,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:20:52,235 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:20:52,272 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 19:20:52,439 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:20:52,439 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 19:20:52,440 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:20:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -676652938, now seen corresponding path program 2 times [2025-04-13 19:20:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:20:52,440 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912654837] [2025-04-13 19:20:52,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:20:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:20:52,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:20:52,531 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:20:52,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:20:52,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:20:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:20:53,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:20:53,392 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912654837] [2025-04-13 19:20:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912654837] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:20:53,392 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757748030] [2025-04-13 19:20:53,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:20:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:20:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:20:53,398 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 19:20:53,400 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 19:20:53,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:20:53,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:20:53,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:20:53,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:20:53,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 19:20:53,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:20:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:20:54,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:20:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:20:54,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757748030] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:20:54,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:20:54,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 19:20:54,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232660556] [2025-04-13 19:20:54,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:20:54,855 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 19:20:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:20:54,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 19:20:54,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2989, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 19:20:54,927 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:20:54,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 6962 transitions, 56491 flow. Second operand has 59 states, 59 states have (on average 3.3728813559322033) internal successors, (199), 59 states have internal predecessors, (199), 0 states have call successors, (0), 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 19:20:54,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:20:54,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:20:54,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand