/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-wmm/safe033_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:37:42,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:37:42,947 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:37:42,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:37:42,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:37:42,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:37:42,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:37:42,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:37:42,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:37:42,970 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:37:42,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:37:42,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:37:42,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:37:42,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:37:42,972 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:42,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:42,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:42,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:37:42,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:37:42,974 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:37:43,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:37:43,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:37:43,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:37:43,195 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:37:43,195 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:37:43,196 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2025-04-13 19:37:44,483 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc95cda2/93b0b0cbf3f2450b826e08f83e91d839/FLAG1bc55e108 [2025-04-13 19:37:44,745 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:37:44,746 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2025-04-13 19:37:44,762 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc95cda2/93b0b0cbf3f2450b826e08f83e91d839/FLAG1bc55e108 [2025-04-13 19:37:45,483 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc95cda2/93b0b0cbf3f2450b826e08f83e91d839 [2025-04-13 19:37:45,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:37:45,486 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:37:45,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:45,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:37:45,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:37:45,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d28b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45, skipping insertion in model container [2025-04-13 19:37:45,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,524 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:37:45,699 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-wmm/safe033_tso.i[945,958] [2025-04-13 19:37:45,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:45,873 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:37:45,897 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-wmm/safe033_tso.i[945,958] [2025-04-13 19:37:45,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:45,950 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:37:45,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45 WrapperNode [2025-04-13 19:37:45,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:45,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:45,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:37:45,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:37:45,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,988 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 49 [2025-04-13 19:37:45,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:45,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:37:45,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:37:45,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:37:45,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:45,996 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,005 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 19:37:46,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,009 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:37:46,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:37:46,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:37:46,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:37:46,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (1/1) ... [2025-04-13 19:37:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:37:46,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 19:37:46,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-04-13 19:37:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-04-13 19:37:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:37:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:37:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:37:46,059 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:37:46,135 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:37:46,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:37:46,231 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:37:46,232 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:37:46,232 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:37:46,313 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:37:46,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:46 BoogieIcfgContainer [2025-04-13 19:37:46,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:37:46,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:37:46,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:37:46,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:37:46,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:37:45" (1/3) ... [2025-04-13 19:37:46,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469b51f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:46, skipping insertion in model container [2025-04-13 19:37:46,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:45" (2/3) ... [2025-04-13 19:37:46,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469b51f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:46, skipping insertion in model container [2025-04-13 19:37:46,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:46" (3/3) ... [2025-04-13 19:37:46,320 INFO L128 eAbstractionObserver]: Analyzing ICFG safe033_tso.i [2025-04-13 19:37:46,329 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:37:46,330 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe033_tso.i that has 3 procedures, 27 locations, 24 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 19:37:46,330 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:37:46,357 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:46,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 26 transitions, 60 flow [2025-04-13 19:37:46,409 INFO L116 PetriNetUnfolderBase]: 0/24 cut-off events. [2025-04-13 19:37:46,411 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:46,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2025-04-13 19:37:46,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 26 transitions, 60 flow [2025-04-13 19:37:46,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2025-04-13 19:37:46,420 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:46,429 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;@7e4ac6be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:46,429 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:37:46,434 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:46,435 INFO L116 PetriNetUnfolderBase]: 0/21 cut-off events. [2025-04-13 19:37:46,435 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:46,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:46,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:46,435 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 19:37:46,440 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1809879736, now seen corresponding path program 1 times [2025-04-13 19:37:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:46,445 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912087109] [2025-04-13 19:37:46,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:46,501 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:37:46,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:37:46,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:46,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:37:46,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:46,762 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912087109] [2025-04-13 19:37:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912087109] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:46,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:46,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:37:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750487338] [2025-04-13 19:37:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:46,769 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 19:37:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:46,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 19:37:46,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 19:37:46,803 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 26 [2025-04-13 19:37:46,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:46,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:46,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 26 [2025-04-13 19:37:46,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:46,888 INFO L116 PetriNetUnfolderBase]: 54/137 cut-off events. [2025-04-13 19:37:46,888 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:37:46,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 137 events. 54/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 530 event pairs, 6 based on Foata normal form. 9/140 useless extension candidates. Maximal degree in co-relation 251. Up to 55 conditions per place. [2025-04-13 19:37:46,891 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 17 selfloop transitions, 4 changer transitions 1/33 dead transitions. [2025-04-13 19:37:46,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 119 flow [2025-04-13 19:37:46,893 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 19:37:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 19:37:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-04-13 19:37:46,901 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2025-04-13 19:37:46,903 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 4 states and 76 transitions. [2025-04-13 19:37:46,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 119 flow [2025-04-13 19:37:46,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:37:46,910 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 76 flow [2025-04-13 19:37:46,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2025-04-13 19:37:46,915 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2025-04-13 19:37:46,915 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 76 flow [2025-04-13 19:37:46,915 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:46,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:46,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:46,915 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:37:46,916 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 19:37:46,916 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash 914110715, now seen corresponding path program 1 times [2025-04-13 19:37:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:46,916 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542535759] [2025-04-13 19:37:46,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:46,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 19:37:46,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:37:46,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:46,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:37:47,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:47,065 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542535759] [2025-04-13 19:37:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542535759] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:47,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:37:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772502216] [2025-04-13 19:37:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:47,066 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 19:37:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:47,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 19:37:47,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 19:37:47,074 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 26 [2025-04-13 19:37:47,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:47,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 26 [2025-04-13 19:37:47,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:47,162 INFO L116 PetriNetUnfolderBase]: 38/100 cut-off events. [2025-04-13 19:37:47,162 INFO L117 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2025-04-13 19:37:47,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 100 events. 38/100 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 2 based on Foata normal form. 8/104 useless extension candidates. Maximal degree in co-relation 233. Up to 28 conditions per place. [2025-04-13 19:37:47,164 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 16 selfloop transitions, 6 changer transitions 1/34 dead transitions. [2025-04-13 19:37:47,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 145 flow [2025-04-13 19:37:47,165 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:37:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:37:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2025-04-13 19:37:47,166 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2025-04-13 19:37:47,166 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 76 flow. Second operand 5 states and 90 transitions. [2025-04-13 19:37:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 145 flow [2025-04-13 19:37:47,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 136 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 19:37:47,167 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 92 flow [2025-04-13 19:37:47,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2025-04-13 19:37:47,168 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-04-13 19:37:47,168 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 92 flow [2025-04-13 19:37:47,168 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,168 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:47,168 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:47,169 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:37:47,169 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 19:37:47,169 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 687701182, now seen corresponding path program 1 times [2025-04-13 19:37:47,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:47,169 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573183475] [2025-04-13 19:37:47,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:47,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:47,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 19:37:47,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:37:47,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:47,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:37:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:47,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573183475] [2025-04-13 19:37:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573183475] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:47,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:37:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793345715] [2025-04-13 19:37:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:47,285 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 19:37:47,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:47,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 19:37:47,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 19:37:47,290 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 26 [2025-04-13 19:37:47,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:47,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 26 [2025-04-13 19:37:47,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:47,367 INFO L116 PetriNetUnfolderBase]: 64/179 cut-off events. [2025-04-13 19:37:47,367 INFO L117 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-04-13 19:37:47,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 179 events. 64/179 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 728 event pairs, 25 based on Foata normal form. 4/171 useless extension candidates. Maximal degree in co-relation 399. Up to 77 conditions per place. [2025-04-13 19:37:47,371 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 15 selfloop transitions, 4 changer transitions 5/36 dead transitions. [2025-04-13 19:37:47,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 170 flow [2025-04-13 19:37:47,372 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 19:37:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 19:37:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-04-13 19:37:47,373 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7019230769230769 [2025-04-13 19:37:47,373 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 92 flow. Second operand 4 states and 73 transitions. [2025-04-13 19:37:47,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 170 flow [2025-04-13 19:37:47,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-04-13 19:37:47,375 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 92 flow [2025-04-13 19:37:47,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2025-04-13 19:37:47,375 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-04-13 19:37:47,375 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 92 flow [2025-04-13 19:37:47,377 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:47,377 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:47,377 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:37:47,377 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 19:37:47,378 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1420342480, now seen corresponding path program 2 times [2025-04-13 19:37:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:47,378 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413911737] [2025-04-13 19:37:47,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:37:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:47,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 1 equivalence classes. [2025-04-13 19:37:47,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:37:47,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 19:37:47,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:37:47,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:47,509 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413911737] [2025-04-13 19:37:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413911737] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:47,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:47,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:37:47,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597498678] [2025-04-13 19:37:47,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:47,509 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 19:37:47,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:47,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 19:37:47,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 19:37:47,515 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 26 [2025-04-13 19:37:47,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:47,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 26 [2025-04-13 19:37:47,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:47,594 INFO L116 PetriNetUnfolderBase]: 62/193 cut-off events. [2025-04-13 19:37:47,594 INFO L117 PetriNetUnfolderBase]: For 33/38 co-relation queries the response was YES. [2025-04-13 19:37:47,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 193 events. 62/193 cut-off events. For 33/38 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 905 event pairs, 20 based on Foata normal form. 9/186 useless extension candidates. Maximal degree in co-relation 398. Up to 56 conditions per place. [2025-04-13 19:37:47,595 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2025-04-13 19:37:47,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 150 flow [2025-04-13 19:37:47,596 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:37:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:37:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-04-13 19:37:47,597 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6615384615384615 [2025-04-13 19:37:47,597 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 92 flow. Second operand 5 states and 86 transitions. [2025-04-13 19:37:47,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 150 flow [2025-04-13 19:37:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:37:47,598 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2025-04-13 19:37:47,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2025-04-13 19:37:47,599 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-04-13 19:37:47,599 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2025-04-13 19:37:47,599 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:47,602 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 19:37:47,602 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 19:37:47,602 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 19:37:47,602 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:37:47,602 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2025-04-13 19:37:47,605 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:37:47,605 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:37:47,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:37:47 BasicIcfg [2025-04-13 19:37:47,611 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:37:47,612 INFO L158 Benchmark]: Toolchain (without parser) took 2125.57ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 73.7MB in the end (delta: 25.0MB). Peak memory consumption was 22.6MB. Max. memory is 8.0GB. [2025-04-13 19:37:47,612 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 95.8MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:47,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.50ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 75.6MB in the end (delta: 23.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-13 19:37:47,612 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.55ms. Allocated memory is still 142.6MB. Free memory was 75.6MB in the beginning and 73.6MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 19:37:47,612 INFO L158 Benchmark]: Boogie Preprocessor took 25.02ms. Allocated memory is still 142.6MB. Free memory was 73.6MB in the beginning and 72.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:47,613 INFO L158 Benchmark]: RCFGBuilder took 299.30ms. Allocated memory is still 142.6MB. Free memory was 72.0MB in the beginning and 52.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-13 19:37:47,613 INFO L158 Benchmark]: TraceAbstraction took 1296.25ms. Allocated memory is still 142.6MB. Free memory was 51.6MB in the beginning and 73.7MB in the end (delta: -22.1MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:47,614 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 95.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 463.50ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 75.6MB in the end (delta: 23.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.55ms. Allocated memory is still 142.6MB. Free memory was 75.6MB in the beginning and 73.6MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.02ms. Allocated memory is still 142.6MB. Free memory was 73.6MB in the beginning and 72.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 299.30ms. Allocated memory is still 142.6MB. Free memory was 72.0MB in the beginning and 52.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1296.25ms. Allocated memory is still 142.6MB. Free memory was 51.6MB in the beginning and 73.7MB in the end (delta: -22.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 44 locations, 41 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 65 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 58 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 159 IncrementalHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 2 mSDtfsCounter, 159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 201 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 19:37:47,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...