/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/weaver/parallel-ticket-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:18:39,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:18:39,361 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 20:18:39,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:18:39,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:18:39,384 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:18:39,385 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:18:39,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:18:39,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:18:39,385 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:18:39,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:18:39,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:18:39,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:18:39,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:18:39,386 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:18:39,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:18:39,387 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:18:39,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:18:39,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:18:39,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:18:39,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:18:39,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:18:39,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:18:39,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:18:39,389 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 20:18:39,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:18:39,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:18:39,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:18:39,620 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:18:39,620 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:18:39,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c [2025-04-13 20:18:40,903 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628ebce7a/906c605998554b6e84d808f6751581c2/FLAGf003b88f2 [2025-04-13 20:18:41,055 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:18:41,056 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c [2025-04-13 20:18:41,060 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628ebce7a/906c605998554b6e84d808f6751581c2/FLAGf003b88f2 [2025-04-13 20:18:41,953 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628ebce7a/906c605998554b6e84d808f6751581c2 [2025-04-13 20:18:41,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:18:41,956 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:18:41,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:18:41,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:18:41,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:18:41,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:18:41" (1/1) ... [2025-04-13 20:18:41,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c47f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:41, skipping insertion in model container [2025-04-13 20:18:41,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:18:41" (1/1) ... [2025-04-13 20:18:41,971 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:18:42,100 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c[2108,2121] [2025-04-13 20:18:42,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:18:42,113 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:18:42,130 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c[2108,2121] [2025-04-13 20:18:42,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:18:42,141 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:18:42,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42 WrapperNode [2025-04-13 20:18:42,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:18:42,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:18:42,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:18:42,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:18:42,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,168 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2025-04-13 20:18:42,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:18:42,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:18:42,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:18:42,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:18:42,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,185 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 20:18:42,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,188 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:18:42,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:18:42,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:18:42,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:18:42,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (1/1) ... [2025-04-13 20:18:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:18:42,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:18:42,213 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 20:18:42,215 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 20:18:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:18:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:18:42,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:18:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:18:42,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:18:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:18:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:18:42,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:18:42,230 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 20:18:42,286 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:18:42,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:18:42,407 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:18:42,408 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:18:42,408 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:18:42,515 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:18:42,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:18:42 BoogieIcfgContainer [2025-04-13 20:18:42,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:18:42,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:18:42,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:18:42,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:18:42,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:18:41" (1/3) ... [2025-04-13 20:18:42,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486c0f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:18:42, skipping insertion in model container [2025-04-13 20:18:42,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:18:42" (2/3) ... [2025-04-13 20:18:42,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486c0f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:18:42, skipping insertion in model container [2025-04-13 20:18:42,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:18:42" (3/3) ... [2025-04-13 20:18:42,521 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-ticket-2.wvr.c [2025-04-13 20:18:42,530 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:18:42,531 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-ticket-2.wvr.c that has 3 procedures, 33 locations, 31 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 20:18:42,531 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:18:42,556 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:18:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 80 flow [2025-04-13 20:18:42,605 INFO L116 PetriNetUnfolderBase]: 1/31 cut-off events. [2025-04-13 20:18:42,606 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:18:42,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 1/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-04-13 20:18:42,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 80 flow [2025-04-13 20:18:42,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 30 transitions, 72 flow [2025-04-13 20:18:42,613 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:18:42,621 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;@78cee801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:18:42,621 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:18:42,632 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:18:42,632 INFO L116 PetriNetUnfolderBase]: 1/29 cut-off events. [2025-04-13 20:18:42,632 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:18:42,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:42,633 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, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:42,633 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 20:18:42,637 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1343426551, now seen corresponding path program 1 times [2025-04-13 20:18:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:42,642 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099481122] [2025-04-13 20:18:42,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:18:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:42,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 20:18:42,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 20:18:42,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:18:42,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:42,903 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 20:18:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:42,903 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099481122] [2025-04-13 20:18:42,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099481122] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:18:42,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:18:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:18:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191206948] [2025-04-13 20:18:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:18:42,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:18:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:42,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:18:42,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:18:42,937 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2025-04-13 20:18:42,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 20:18:42,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:42,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2025-04-13 20:18:42,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:43,032 INFO L116 PetriNetUnfolderBase]: 124/256 cut-off events. [2025-04-13 20:18:43,033 INFO L117 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-04-13 20:18:43,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 256 events. 124/256 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 977 event pairs, 82 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 451. Up to 164 conditions per place. [2025-04-13 20:18:43,035 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 24 selfloop transitions, 4 changer transitions 4/39 dead transitions. [2025-04-13 20:18:43,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 160 flow [2025-04-13 20:18:43,036 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:18:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:18:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-04-13 20:18:43,044 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2025-04-13 20:18:43,045 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 72 flow. Second operand 3 states and 60 transitions. [2025-04-13 20:18:43,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 160 flow [2025-04-13 20:18:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 148 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:18:43,050 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 76 flow [2025-04-13 20:18:43,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2025-04-13 20:18:43,053 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2025-04-13 20:18:43,054 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 76 flow [2025-04-13 20:18:43,054 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 20:18:43,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:43,054 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:43,054 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:18:43,054 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 20:18:43,055 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1917426029, now seen corresponding path program 1 times [2025-04-13 20:18:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:43,055 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548972878] [2025-04-13 20:18:43,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:18:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:43,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 20:18:43,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:18:43,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:18:43,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:43,159 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 20:18:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:43,159 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548972878] [2025-04-13 20:18:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548972878] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:18:43,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:18:43,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:18:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998844424] [2025-04-13 20:18:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:18:43,160 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:18:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:43,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:18:43,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:18:43,166 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2025-04-13 20:18:43,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 20:18:43,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:43,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2025-04-13 20:18:43,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:43,239 INFO L116 PetriNetUnfolderBase]: 64/151 cut-off events. [2025-04-13 20:18:43,239 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 20:18:43,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 151 events. 64/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 457 event pairs, 41 based on Foata normal form. 13/161 useless extension candidates. Maximal degree in co-relation 201. Up to 120 conditions per place. [2025-04-13 20:18:43,241 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2025-04-13 20:18:43,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 147 flow [2025-04-13 20:18:43,241 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:18:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:18:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2025-04-13 20:18:43,242 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2025-04-13 20:18:43,242 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 54 transitions. [2025-04-13 20:18:43,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 147 flow [2025-04-13 20:18:43,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 133 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-04-13 20:18:43,243 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 79 flow [2025-04-13 20:18:43,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2025-04-13 20:18:43,243 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2025-04-13 20:18:43,243 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 79 flow [2025-04-13 20:18:43,243 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 20:18:43,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:43,244 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:43,244 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:18:43,244 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 20:18:43,244 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -399989243, now seen corresponding path program 2 times [2025-04-13 20:18:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:43,244 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217816050] [2025-04-13 20:18:43,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:18:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:43,251 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 1 equivalence classes. [2025-04-13 20:18:43,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:18:43,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:18:43,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:43,373 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 20:18:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:43,373 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217816050] [2025-04-13 20:18:43,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217816050] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:18:43,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:18:43,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:18:43,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120964675] [2025-04-13 20:18:43,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:18:43,375 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:18:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:43,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:18:43,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:18:43,381 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2025-04-13 20:18:43,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 79 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 20:18:43,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:43,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2025-04-13 20:18:43,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:43,485 INFO L116 PetriNetUnfolderBase]: 47/139 cut-off events. [2025-04-13 20:18:43,485 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 20:18:43,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 139 events. 47/139 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 447 event pairs, 12 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 77. Up to 43 conditions per place. [2025-04-13 20:18:43,486 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 21 selfloop transitions, 8 changer transitions 9/45 dead transitions. [2025-04-13 20:18:43,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 190 flow [2025-04-13 20:18:43,488 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:18:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:18:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-04-13 20:18:43,489 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2025-04-13 20:18:43,489 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 79 flow. Second operand 5 states and 84 transitions. [2025-04-13 20:18:43,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 190 flow [2025-04-13 20:18:43,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 20:18:43,490 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 101 flow [2025-04-13 20:18:43,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2025-04-13 20:18:43,491 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-04-13 20:18:43,491 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 101 flow [2025-04-13 20:18:43,491 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 20:18:43,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:43,491 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:43,491 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:18:43,491 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 20:18:43,493 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1514646713, now seen corresponding path program 3 times [2025-04-13 20:18:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:43,494 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886458598] [2025-04-13 20:18:43,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:18:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:43,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 1 equivalence classes. [2025-04-13 20:18:43,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:18:43,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:18:43,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:43,598 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 20:18:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:43,598 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886458598] [2025-04-13 20:18:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886458598] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:18:43,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:18:43,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:18:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810197600] [2025-04-13 20:18:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:18:43,599 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:18:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:43,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:18:43,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:18:43,604 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2025-04-13 20:18:43,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 20:18:43,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:43,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2025-04-13 20:18:43,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:43,641 INFO L116 PetriNetUnfolderBase]: 2/21 cut-off events. [2025-04-13 20:18:43,642 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-13 20:18:43,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 21 events. 2/21 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 2/22 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2025-04-13 20:18:43,642 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2025-04-13 20:18:43,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 87 flow [2025-04-13 20:18:43,642 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:18:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:18:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-04-13 20:18:43,644 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2025-04-13 20:18:43,644 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 101 flow. Second operand 5 states and 61 transitions. [2025-04-13 20:18:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 87 flow [2025-04-13 20:18:43,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 77 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 20:18:43,645 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2025-04-13 20:18:43,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2025-04-13 20:18:43,645 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -9 predicate places. [2025-04-13 20:18:43,645 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2025-04-13 20:18:43,645 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 20:18:43,648 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 20:18:43,648 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 20:18:43,648 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 20:18:43,648 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:18:43,648 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1] [2025-04-13 20:18:43,651 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:18:43,651 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:18:43,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:18:43 BasicIcfg [2025-04-13 20:18:43,656 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:18:43,656 INFO L158 Benchmark]: Toolchain (without parser) took 1700.36ms. Allocated memory is still 142.6MB. Free memory was 97.8MB in the beginning and 101.3MB in the end (delta: -3.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:18:43,656 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:18:43,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.68ms. Allocated memory is still 142.6MB. Free memory was 97.0MB in the beginning and 83.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:18:43,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.61ms. Allocated memory is still 142.6MB. Free memory was 83.4MB in the beginning and 81.6MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:18:43,658 INFO L158 Benchmark]: Boogie Preprocessor took 23.02ms. Allocated memory is still 142.6MB. Free memory was 81.6MB in the beginning and 79.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:18:43,658 INFO L158 Benchmark]: RCFGBuilder took 323.36ms. Allocated memory is still 142.6MB. Free memory was 79.9MB in the beginning and 52.2MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2025-04-13 20:18:43,658 INFO L158 Benchmark]: TraceAbstraction took 1138.88ms. Allocated memory is still 142.6MB. Free memory was 51.4MB in the beginning and 101.3MB in the end (delta: -49.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:18:43,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.68ms. Allocated memory is still 142.6MB. Free memory was 97.0MB in the beginning and 83.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.61ms. Allocated memory is still 142.6MB. Free memory was 83.4MB in the beginning and 81.6MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.02ms. Allocated memory is still 142.6MB. Free memory was 81.6MB in the beginning and 79.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 323.36ms. Allocated memory is still 142.6MB. Free memory was 79.9MB in the beginning and 52.2MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1138.88ms. Allocated memory is still 142.6MB. Free memory was 51.4MB in the beginning and 101.3MB in the end (delta: -49.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: 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, 50 locations, 51 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: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 202 IncrementalHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 202 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=3, InterpolantAutomatonStates: 16, 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, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 253 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 20:18:43,674 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...