/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread-ext/25_stack.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:50:18,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:50:18,128 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 23:50:18,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:50:18,131 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:50:18,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:50:18,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:50:18,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:50:18,156 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:50:18,156 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:50:18,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:50:18,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:50:18,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:50:18,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:50:18,157 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:50:18,158 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:50:18,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:50:18,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:50:18,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:50:18,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:50:18,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:50:18,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:50:18,159 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-13 23:50:18,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:50:18,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:50:18,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:50:18,399 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:50:18,399 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:50:18,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack.i [2025-04-13 23:50:19,700 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc495481e/83ce93caa59d456b80155bf7662875e9/FLAG659bccf8a [2025-04-13 23:50:19,911 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:50:19,911 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack.i [2025-04-13 23:50:19,920 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc495481e/83ce93caa59d456b80155bf7662875e9/FLAG659bccf8a [2025-04-13 23:50:20,701 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc495481e/83ce93caa59d456b80155bf7662875e9 [2025-04-13 23:50:20,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:50:20,704 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:50:20,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:50:20,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:50:20,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:50:20,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:50:20" (1/1) ... [2025-04-13 23:50:20,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f426c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:20, skipping insertion in model container [2025-04-13 23:50:20,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:50:20" (1/1) ... [2025-04-13 23:50:20,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:50:21,050 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-ext/25_stack.i[31336,31349] [2025-04-13 23:50:21,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:50:21,083 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:50:21,135 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-ext/25_stack.i[31336,31349] [2025-04-13 23:50:21,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:50:21,167 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:50:21,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21 WrapperNode [2025-04-13 23:50:21,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:50:21,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:50:21,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:50:21,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:50:21,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,201 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 191 [2025-04-13 23:50:21,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:50:21,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:50:21,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:50:21,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:50:21,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,217 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,229 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 0 writes are split as follows [0, 0, 0]. [2025-04-13 23:50:21,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,232 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:50:21,239 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:50:21,240 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:50:21,240 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:50:21,240 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (1/1) ... [2025-04-13 23:50:21,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:50:21,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:50:21,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 23:50:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-04-13 23:50:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 23:50:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 23:50:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:50:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 23:50:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:50:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:50:21,284 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:50:21,392 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:50:21,393 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:50:21,620 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:50:21,621 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:50:21,621 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:50:21,972 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:50:21,979 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:50:21,987 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:50:21,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:50:21 BoogieIcfgContainer [2025-04-13 23:50:21,988 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:50:21,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:50:21,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:50:21,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:50:21,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:50:20" (1/3) ... [2025-04-13 23:50:21,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb56923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:50:21, skipping insertion in model container [2025-04-13 23:50:21,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:50:21" (2/3) ... [2025-04-13 23:50:21,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb56923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:50:21, skipping insertion in model container [2025-04-13 23:50:21,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:50:21" (3/3) ... [2025-04-13 23:50:21,996 INFO L128 eAbstractionObserver]: Analyzing ICFG 25_stack.i [2025-04-13 23:50:22,007 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:50:22,008 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 25_stack.i that has 2 procedures, 24 locations, 29 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 23:50:22,008 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:50:22,054 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 30 transitions, 64 flow [2025-04-13 23:50:22,109 INFO L116 PetriNetUnfolderBase]: 5/30 cut-off events. [2025-04-13 23:50:22,111 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:50:22,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 5/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 3 conditions per place. [2025-04-13 23:50:22,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 30 transitions, 64 flow [2025-04-13 23:50:22,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 29 transitions, 62 flow [2025-04-13 23:50:22,126 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:22,137 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:22,137 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:50:22,144 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:22,144 INFO L116 PetriNetUnfolderBase]: 0/5 cut-off events. [2025-04-13 23:50:22,144 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:50:22,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:22,145 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-13 23:50:22,146 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-13 23:50:22,149 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 13870178, now seen corresponding path program 1 times [2025-04-13 23:50:22,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:22,155 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090448984] [2025-04-13 23:50:22,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:22,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:22,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 23:50:22,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 23:50:22,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:22,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:22,482 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 23:50:22,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 23:50:22,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 23:50:22,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:22,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:22,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 23:50:22,547 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 23:50:22,547 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 23:50:22,548 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 23:50:22,549 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2025-04-13 23:50:22,549 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:50:22,549 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 23:50:22,551 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 23:50:22,551 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 23:50:22,594 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:22,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 55 transitions, 120 flow [2025-04-13 23:50:22,622 INFO L116 PetriNetUnfolderBase]: 10/57 cut-off events. [2025-04-13 23:50:22,622 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:50:22,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 57 events. 10/57 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 50. Up to 3 conditions per place. [2025-04-13 23:50:22,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 55 transitions, 120 flow [2025-04-13 23:50:22,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 54 transitions, 118 flow [2025-04-13 23:50:22,625 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:22,626 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:22,626 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 23:50:22,633 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:22,633 INFO L116 PetriNetUnfolderBase]: 0/12 cut-off events. [2025-04-13 23:50:22,635 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:50:22,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:22,635 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-04-13 23:50:22,635 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-04-13 23:50:22,635 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2093632283, now seen corresponding path program 1 times [2025-04-13 23:50:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:22,636 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395653009] [2025-04-13 23:50:22,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:22,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 23:50:22,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 23:50:22,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:22,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:22,946 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 23:50:22,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 23:50:22,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 23:50:22,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:22,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:22,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 23:50:22,992 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 23:50:22,992 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-04-13 23:50:22,992 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-04-13 23:50:22,992 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-04-13 23:50:22,992 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-13 23:50:22,993 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 23:50:22,993 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 23:50:22,993 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 23:50:22,993 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 23:50:23,057 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:23,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 80 transitions, 178 flow [2025-04-13 23:50:23,094 INFO L116 PetriNetUnfolderBase]: 15/84 cut-off events. [2025-04-13 23:50:23,094 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 23:50:23,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 15/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 216 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2025-04-13 23:50:23,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 80 transitions, 178 flow [2025-04-13 23:50:23,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 79 transitions, 176 flow [2025-04-13 23:50:23,097 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:23,097 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:23,097 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 23:50:23,101 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:23,101 INFO L116 PetriNetUnfolderBase]: 1/22 cut-off events. [2025-04-13 23:50:23,101 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 23:50:23,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:23,102 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2025-04-13 23:50:23,102 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-04-13 23:50:23,102 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash -173179963, now seen corresponding path program 1 times [2025-04-13 23:50:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:23,102 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880850100] [2025-04-13 23:50:23,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:23,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 23:50:23,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 23:50:23,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,261 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 23:50:23,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 23:50:23,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 23:50:23,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 23:50:23,294 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 23:50:23,294 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-04-13 23:50:23,294 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-13 23:50:23,295 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-04-13 23:50:23,295 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-04-13 23:50:23,295 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 23:50:23,295 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 23:50:23,295 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 23:50:23,295 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 23:50:23,295 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-13 23:50:23,345 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:23,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 105 transitions, 238 flow [2025-04-13 23:50:23,371 INFO L116 PetriNetUnfolderBase]: 20/111 cut-off events. [2025-04-13 23:50:23,371 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 23:50:23,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 20/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 355 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 98. Up to 5 conditions per place. [2025-04-13 23:50:23,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 105 transitions, 238 flow [2025-04-13 23:50:23,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 104 transitions, 236 flow [2025-04-13 23:50:23,374 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:23,375 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:23,375 INFO L341 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-04-13 23:50:23,384 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:23,384 INFO L116 PetriNetUnfolderBase]: 2/34 cut-off events. [2025-04-13 23:50:23,384 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 23:50:23,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:23,384 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2025-04-13 23:50:23,384 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2025-04-13 23:50:23,385 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 649128320, now seen corresponding path program 1 times [2025-04-13 23:50:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:23,385 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543480999] [2025-04-13 23:50:23,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:23,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 23:50:23,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 23:50:23,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,550 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 23:50:23,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 23:50:23,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 23:50:23,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 23:50:23,566 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-04-13 23:50:23,567 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-04-13 23:50:23,567 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 23:50:23,567 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 23:50:23,568 WARN L247 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 23:50:23,568 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-04-13 23:50:23,618 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:23,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 130 transitions, 300 flow [2025-04-13 23:50:23,651 INFO L116 PetriNetUnfolderBase]: 25/138 cut-off events. [2025-04-13 23:50:23,652 INFO L117 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-04-13 23:50:23,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 138 events. 25/138 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 468 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 129. Up to 6 conditions per place. [2025-04-13 23:50:23,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 130 transitions, 300 flow [2025-04-13 23:50:23,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 129 transitions, 298 flow [2025-04-13 23:50:23,658 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:23,659 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:23,659 INFO L341 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-04-13 23:50:23,671 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:23,672 INFO L116 PetriNetUnfolderBase]: 5/56 cut-off events. [2025-04-13 23:50:23,672 INFO L117 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-04-13 23:50:23,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:23,672 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:50:23,672 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2025-04-13 23:50:23,672 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027820, now seen corresponding path program 1 times [2025-04-13 23:50:23,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:23,672 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057660582] [2025-04-13 23:50:23,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:23,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:23,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:50:23,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:50:23,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,856 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 23:50:23,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:50:23,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:50:23,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:23,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 23:50:23,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 23:50:23,890 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 23:50:23,890 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-04-13 23:50:23,890 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-04-13 23:50:23,890 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-04-13 23:50:23,891 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-04-13 23:50:23,891 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-04-13 23:50:23,891 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-04-13 23:50:23,891 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-04-13 23:50:23,891 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 23:50:23,891 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 23:50:23,891 WARN L247 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 23:50:23,891 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2025-04-13 23:50:23,966 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:50:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 155 transitions, 364 flow [2025-04-13 23:50:23,991 INFO L116 PetriNetUnfolderBase]: 30/165 cut-off events. [2025-04-13 23:50:23,992 INFO L117 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-04-13 23:50:23,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 165 events. 30/165 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 608 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 163. Up to 7 conditions per place. [2025-04-13 23:50:23,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 155 transitions, 364 flow [2025-04-13 23:50:23,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 154 transitions, 362 flow [2025-04-13 23:50:23,996 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:50:23,996 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;@55dd2ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:50:23,996 INFO L341 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-04-13 23:50:24,003 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:50:24,004 INFO L116 PetriNetUnfolderBase]: 9/74 cut-off events. [2025-04-13 23:50:24,004 INFO L117 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-04-13 23:50:24,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:50:24,004 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:50:24,004 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2025-04-13 23:50:24,004 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:50:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -512353024, now seen corresponding path program 1 times [2025-04-13 23:50:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:50:24,004 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115571148] [2025-04-13 23:50:24,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:50:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:50:24,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-13 23:50:24,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 23:50:24,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:50:24,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:50:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:50:24,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:50:24,316 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115571148] [2025-04-13 23:50:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115571148] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:50:24,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:50:24,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 23:50:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309093924] [2025-04-13 23:50:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:50:24,323 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:50:24,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:50:24,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:50:24,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:50:24,346 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 155 [2025-04-13 23:50:24,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:50:24,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:50:24,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 155 [2025-04-13 23:50:24,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand