/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/chl-time-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:05:42,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:05:42,299 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 20:05:42,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:05:42,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:05:42,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:05:42,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:05:42,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:05:42,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:05:42,323 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:05:42,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:05:42,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:05:42,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:05:42,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:05:42,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:05:42,325 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:42,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:05:42,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:42,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:05:42,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:05:42,326 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 20:05:42,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:05:42,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:05:42,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:05:42,516 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:05:42,517 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:05:42,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-time-subst.wvr.c [2025-04-13 20:05:43,787 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2174b565/92c778d22b9547bea85c59f183286570/FLAG970fd01d5 [2025-04-13 20:05:44,038 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:05:44,039 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-time-subst.wvr.c [2025-04-13 20:05:44,046 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2174b565/92c778d22b9547bea85c59f183286570/FLAG970fd01d5 [2025-04-13 20:05:44,988 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2174b565/92c778d22b9547bea85c59f183286570 [2025-04-13 20:05:44,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:05:44,991 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:05:44,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:05:44,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:05:44,995 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:05:44,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:05:44" (1/1) ... [2025-04-13 20:05:44,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1996f47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:44, skipping insertion in model container [2025-04-13 20:05:44,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:05:44" (1/1) ... [2025-04-13 20:05:45,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:05:45,182 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/chl-time-subst.wvr.c[2918,2931] [2025-04-13 20:05:45,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:05:45,199 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:05:45,230 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/chl-time-subst.wvr.c[2918,2931] [2025-04-13 20:05:45,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:05:45,246 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:05:45,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45 WrapperNode [2025-04-13 20:05:45,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:05:45,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:05:45,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:05:45,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:05:45,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,294 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 11, calls inlined = 21, statements flattened = 207 [2025-04-13 20:05:45,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:05:45,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:05:45,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:05:45,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:05:45,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,308 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,324 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 20:05:45,324 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,330 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:05:45,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:05:45,340 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:05:45,340 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:05:45,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (1/1) ... [2025-04-13 20:05:45,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:05:45,366 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 20:05:45,368 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 20:05:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:05:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:05:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:05:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:05:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:05:45,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:05:45,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:05:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:05:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 20:05:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 20:05:45,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:05:45,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:05:45,387 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 20:05:45,469 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:05:45,470 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:05:45,724 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:05:45,725 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:05:45,725 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:05:46,049 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:05:46,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:05:46 BoogieIcfgContainer [2025-04-13 20:05:46,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:05:46,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:05:46,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:05:46,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:05:46,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:05:44" (1/3) ... [2025-04-13 20:05:46,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672902da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:05:46, skipping insertion in model container [2025-04-13 20:05:46,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:45" (2/3) ... [2025-04-13 20:05:46,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672902da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:05:46, skipping insertion in model container [2025-04-13 20:05:46,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:05:46" (3/3) ... [2025-04-13 20:05:46,059 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-time-subst.wvr.c [2025-04-13 20:05:46,069 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:05:46,071 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-time-subst.wvr.c that has 4 procedures, 25 locations, 21 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 20:05:46,071 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:05:46,123 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 20:05:46,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 24 transitions, 69 flow [2025-04-13 20:05:46,169 INFO L116 PetriNetUnfolderBase]: 0/21 cut-off events. [2025-04-13 20:05:46,172 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:05:46,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 21 events. 0/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2025-04-13 20:05:46,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 24 transitions, 69 flow [2025-04-13 20:05:46,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 20 transitions, 58 flow [2025-04-13 20:05:46,187 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:05:46,197 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;@6589c766, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:05:46,197 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 20:05:46,211 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:05:46,211 INFO L116 PetriNetUnfolderBase]: 0/19 cut-off events. [2025-04-13 20:05:46,211 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:05:46,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:46,213 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] [2025-04-13 20:05:46,213 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:46,217 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1485503710, now seen corresponding path program 1 times [2025-04-13 20:05:46,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:46,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139267663] [2025-04-13 20:05:46,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:05:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:46,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:05:46,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:46,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:05:46,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:47,783 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 20:05:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:47,784 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139267663] [2025-04-13 20:05:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139267663] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:47,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:47,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113953556] [2025-04-13 20:05:47,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:47,791 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:47,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:47,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:47,809 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:47,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:48,132 INFO L116 PetriNetUnfolderBase]: 178/335 cut-off events. [2025-04-13 20:05:48,132 INFO L117 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-04-13 20:05:48,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 335 events. 178/335 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1321 event pairs, 46 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 575. Up to 110 conditions per place. [2025-04-13 20:05:48,139 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 30 selfloop transitions, 2 changer transitions 8/43 dead transitions. [2025-04-13 20:05:48,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 208 flow [2025-04-13 20:05:48,140 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-04-13 20:05:48,147 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2025-04-13 20:05:48,149 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 58 flow. Second operand 5 states and 71 transitions. [2025-04-13 20:05:48,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 208 flow [2025-04-13 20:05:48,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-13 20:05:48,160 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 61 flow [2025-04-13 20:05:48,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2025-04-13 20:05:48,164 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-04-13 20:05:48,164 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 61 flow [2025-04-13 20:05:48,164 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:48,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:48,164 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] [2025-04-13 20:05:48,165 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:05:48,165 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:48,165 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash -94789490, now seen corresponding path program 2 times [2025-04-13 20:05:48,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:48,165 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596289402] [2025-04-13 20:05:48,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:05:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:48,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:05:48,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:48,211 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:05:48,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:48,912 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 20:05:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:48,912 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596289402] [2025-04-13 20:05:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596289402] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:48,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:48,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257790981] [2025-04-13 20:05:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:48,913 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:48,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:48,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:48,914 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:48,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:48,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:48,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:48,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:49,174 INFO L116 PetriNetUnfolderBase]: 194/365 cut-off events. [2025-04-13 20:05:49,175 INFO L117 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2025-04-13 20:05:49,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 365 events. 194/365 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1555 event pairs, 24 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 839. Up to 151 conditions per place. [2025-04-13 20:05:49,192 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 32 selfloop transitions, 2 changer transitions 12/49 dead transitions. [2025-04-13 20:05:49,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 49 transitions, 232 flow [2025-04-13 20:05:49,193 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2025-04-13 20:05:49,193 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-04-13 20:05:49,193 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 61 flow. Second operand 5 states and 75 transitions. [2025-04-13 20:05:49,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 49 transitions, 232 flow [2025-04-13 20:05:49,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 225 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 20:05:49,195 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 71 flow [2025-04-13 20:05:49,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2025-04-13 20:05:49,195 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2025-04-13 20:05:49,195 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 71 flow [2025-04-13 20:05:49,195 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:49,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:49,195 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] [2025-04-13 20:05:49,195 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:05:49,196 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:49,196 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 285678916, now seen corresponding path program 3 times [2025-04-13 20:05:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:49,196 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741336626] [2025-04-13 20:05:49,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:05:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:49,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:05:49,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:49,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:05:49,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:49,729 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 20:05:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:49,729 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741336626] [2025-04-13 20:05:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741336626] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:49,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:49,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:49,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108125982] [2025-04-13 20:05:49,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:49,730 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:49,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:49,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:49,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:49,730 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:49,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:49,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:49,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:49,988 INFO L116 PetriNetUnfolderBase]: 153/299 cut-off events. [2025-04-13 20:05:49,988 INFO L117 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2025-04-13 20:05:49,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 299 events. 153/299 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1153 event pairs, 35 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 745. Up to 109 conditions per place. [2025-04-13 20:05:49,990 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 31 selfloop transitions, 3 changer transitions 8/45 dead transitions. [2025-04-13 20:05:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 227 flow [2025-04-13 20:05:49,991 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-04-13 20:05:49,991 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-04-13 20:05:49,991 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 71 flow. Second operand 5 states and 72 transitions. [2025-04-13 20:05:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 227 flow [2025-04-13 20:05:49,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 208 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-04-13 20:05:49,993 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 82 flow [2025-04-13 20:05:49,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2025-04-13 20:05:49,993 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-04-13 20:05:49,993 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 82 flow [2025-04-13 20:05:49,994 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:49,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:49,994 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] [2025-04-13 20:05:49,994 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:05:49,994 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:49,994 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1940644962, now seen corresponding path program 4 times [2025-04-13 20:05:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:49,994 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445080707] [2025-04-13 20:05:49,994 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:05:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:50,003 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-13 20:05:50,014 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:50,014 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:05:50,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:50,490 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 20:05:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:50,491 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445080707] [2025-04-13 20:05:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445080707] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:50,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891552845] [2025-04-13 20:05:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:50,491 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:50,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:50,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:50,492 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:50,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:50,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:50,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:50,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:50,731 INFO L116 PetriNetUnfolderBase]: 160/314 cut-off events. [2025-04-13 20:05:50,731 INFO L117 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2025-04-13 20:05:50,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 314 events. 160/314 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1260 event pairs, 28 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 840. Up to 137 conditions per place. [2025-04-13 20:05:50,733 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 30 selfloop transitions, 2 changer transitions 12/47 dead transitions. [2025-04-13 20:05:50,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 249 flow [2025-04-13 20:05:50,733 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2025-04-13 20:05:50,734 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2025-04-13 20:05:50,734 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 82 flow. Second operand 5 states and 73 transitions. [2025-04-13 20:05:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 249 flow [2025-04-13 20:05:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 20:05:50,736 INFO L231 Difference]: Finished difference. Result has 41 places, 22 transitions, 91 flow [2025-04-13 20:05:50,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=41, PETRI_TRANSITIONS=22} [2025-04-13 20:05:50,736 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2025-04-13 20:05:50,736 INFO L485 AbstractCegarLoop]: Abstraction has has 41 places, 22 transitions, 91 flow [2025-04-13 20:05:50,737 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:50,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:50,737 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] [2025-04-13 20:05:50,737 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:05:50,737 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:50,737 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash 122250440, now seen corresponding path program 5 times [2025-04-13 20:05:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:50,738 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714791985] [2025-04-13 20:05:50,738 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:05:50,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:50,747 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:05:50,763 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:50,763 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:05:50,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:51,210 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 20:05:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:51,211 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714791985] [2025-04-13 20:05:51,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714791985] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:51,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:51,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:51,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222288266] [2025-04-13 20:05:51,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:51,211 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:51,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:51,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:51,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:51,212 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:51,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 22 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:51,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:51,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:51,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:51,428 INFO L116 PetriNetUnfolderBase]: 111/225 cut-off events. [2025-04-13 20:05:51,428 INFO L117 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2025-04-13 20:05:51,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 225 events. 111/225 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 783 event pairs, 21 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 642. Up to 69 conditions per place. [2025-04-13 20:05:51,429 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 20 selfloop transitions, 1 changer transitions 19/43 dead transitions. [2025-04-13 20:05:51,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 228 flow [2025-04-13 20:05:51,431 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-04-13 20:05:51,432 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-04-13 20:05:51,432 INFO L175 Difference]: Start difference. First operand has 41 places, 22 transitions, 91 flow. Second operand 5 states and 70 transitions. [2025-04-13 20:05:51,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 228 flow [2025-04-13 20:05:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 216 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-04-13 20:05:51,434 INFO L231 Difference]: Finished difference. Result has 42 places, 20 transitions, 71 flow [2025-04-13 20:05:51,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=71, PETRI_PLACES=42, PETRI_TRANSITIONS=20} [2025-04-13 20:05:51,436 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2025-04-13 20:05:51,436 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 20 transitions, 71 flow [2025-04-13 20:05:51,437 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:51,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:51,437 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] [2025-04-13 20:05:51,437 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:05:51,437 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:51,438 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash -90806998, now seen corresponding path program 6 times [2025-04-13 20:05:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:51,438 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608840743] [2025-04-13 20:05:51,438 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:05:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:51,445 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:05:51,460 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:05:51,461 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-04-13 20:05:51,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:51,974 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 20:05:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:51,974 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608840743] [2025-04-13 20:05:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608840743] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604977338] [2025-04-13 20:05:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:51,975 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:51,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:51,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:51,976 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-13 20:05:51,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 20 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:51,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:51,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-13 20:05:51,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:52,125 INFO L116 PetriNetUnfolderBase]: 52/115 cut-off events. [2025-04-13 20:05:52,126 INFO L117 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-04-13 20:05:52,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 115 events. 52/115 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 298 event pairs, 10 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 327. Up to 54 conditions per place. [2025-04-13 20:05:52,126 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2025-04-13 20:05:52,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 147 flow [2025-04-13 20:05:52,127 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:05:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:05:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2025-04-13 20:05:52,128 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-04-13 20:05:52,128 INFO L175 Difference]: Start difference. First operand has 42 places, 20 transitions, 71 flow. Second operand 5 states and 57 transitions. [2025-04-13 20:05:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 147 flow [2025-04-13 20:05:52,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 133 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-04-13 20:05:52,129 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2025-04-13 20:05:52,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2025-04-13 20:05:52,130 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2025-04-13 20:05:52,130 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2025-04-13 20:05:52,130 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 20:05:52,132 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-13 20:05:52,132 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 20:05:52,132 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 20:05:52,132 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-13 20:05:52,132 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:05:52,132 INFO L422 BasicCegarLoop]: Path program histogram: [6] [2025-04-13 20:05:52,134 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:05:52,134 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:05:52,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:05:52 BasicIcfg [2025-04-13 20:05:52,138 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:05:52,138 INFO L158 Benchmark]: Toolchain (without parser) took 7147.56ms. Allocated memory was 167.8MB in the beginning and 415.2MB in the end (delta: 247.5MB). Free memory was 119.3MB in the beginning and 189.3MB in the end (delta: -70.1MB). Peak memory consumption was 181.5MB. Max. memory is 8.0GB. [2025-04-13 20:05:52,138 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:52,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.58ms. Allocated memory is still 167.8MB. Free memory was 118.6MB in the beginning and 103.8MB in the end (delta: 14.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:05:52,139 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.92ms. Allocated memory is still 167.8MB. Free memory was 103.8MB in the beginning and 101.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:05:52,139 INFO L158 Benchmark]: Boogie Preprocessor took 44.74ms. Allocated memory is still 167.8MB. Free memory was 101.9MB in the beginning and 99.6MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:52,139 INFO L158 Benchmark]: RCFGBuilder took 709.66ms. Allocated memory is still 167.8MB. Free memory was 99.6MB in the beginning and 93.1MB in the end (delta: 6.5MB). Peak memory consumption was 83.1MB. Max. memory is 8.0GB. [2025-04-13 20:05:52,139 INFO L158 Benchmark]: TraceAbstraction took 6085.62ms. Allocated memory was 167.8MB in the beginning and 415.2MB in the end (delta: 247.5MB). Free memory was 93.1MB in the beginning and 189.3MB in the end (delta: -96.2MB). Peak memory consumption was 152.9MB. Max. memory is 8.0GB. [2025-04-13 20:05:52,140 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 159.4MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 256.58ms. Allocated memory is still 167.8MB. Free memory was 118.6MB in the beginning and 103.8MB in the end (delta: 14.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 45.92ms. Allocated memory is still 167.8MB. Free memory was 103.8MB in the beginning and 101.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.74ms. Allocated memory is still 167.8MB. Free memory was 101.9MB in the beginning and 99.6MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 709.66ms. Allocated memory is still 167.8MB. Free memory was 99.6MB in the beginning and 93.1MB in the end (delta: 6.5MB). Peak memory consumption was 83.1MB. Max. memory is 8.0GB. * TraceAbstraction took 6085.62ms. Allocated memory was 167.8MB in the beginning and 415.2MB in the end (delta: 247.5MB). Free memory was 93.1MB in the beginning and 189.3MB in the end (delta: -96.2MB). Peak memory consumption was 152.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: 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 7 procedures, 40 locations, 39 edges, 4 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: 6.0s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 123 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 123 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 604 IncrementalHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 604 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=4, InterpolantAutomatonStates: 30, 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, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 3977 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 20:05:52,153 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...