/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-misc-2-unrolled.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:15:59,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:15:59,215 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 20:15:59,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:15:59,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:15:59,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:15:59,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:15:59,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:15:59,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:15:59,243 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:15:59,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:15:59,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:15:59,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:15:59,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:15:59,245 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:15:59,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:15:59,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:15:59,245 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:15:59,246 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:15:59,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:15:59,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:15:59,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:15:59,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:15:59,247 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 20:15:59,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:15:59,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:15:59,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:15:59,448 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:15:59,450 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:15:59,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2025-04-13 20:16:00,680 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ef17239/d03f0e120f274f95a45e9facb8bb6241/FLAGc1a8613d7 [2025-04-13 20:16:00,871 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:16:00,872 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2025-04-13 20:16:00,877 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ef17239/d03f0e120f274f95a45e9facb8bb6241/FLAGc1a8613d7 [2025-04-13 20:16:01,681 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ef17239/d03f0e120f274f95a45e9facb8bb6241 [2025-04-13 20:16:01,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:16:01,684 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:16:01,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:16:01,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:16:01,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:16:01,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a5069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01, skipping insertion in model container [2025-04-13 20:16:01,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,698 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:16:01,856 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-misc-2-unrolled.wvr.c[2043,2056] [2025-04-13 20:16:01,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:16:01,868 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:16:01,887 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-misc-2-unrolled.wvr.c[2043,2056] [2025-04-13 20:16:01,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:16:01,897 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:16:01,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01 WrapperNode [2025-04-13 20:16:01,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:16:01,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:16:01,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:16:01,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:16:01,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,920 INFO L138 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2025-04-13 20:16:01,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:16:01,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:16:01,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:16:01,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:16:01,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,931 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,941 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 20:16:01,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,944 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:16:01,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:16:01,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:16:01,955 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:16:01,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (1/1) ... [2025-04-13 20:16:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:16:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:16:01,984 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 20:16:01,985 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 20:16:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:16:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:16:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:16:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:16:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:16:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:16:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:16:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:16:02,001 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 20:16:02,057 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:16:02,058 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:16:02,163 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:16:02,164 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:16:02,164 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:16:02,249 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:16:02,255 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:16:02,263 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:16:02,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:16:02 BoogieIcfgContainer [2025-04-13 20:16:02,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:16:02,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:16:02,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:16:02,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:16:02,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:16:01" (1/3) ... [2025-04-13 20:16:02,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a905aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:16:02, skipping insertion in model container [2025-04-13 20:16:02,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:16:01" (2/3) ... [2025-04-13 20:16:02,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a905aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:16:02, skipping insertion in model container [2025-04-13 20:16:02,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:16:02" (3/3) ... [2025-04-13 20:16:02,269 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-misc-2-unrolled.wvr.c [2025-04-13 20:16:02,277 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:16:02,278 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-misc-2-unrolled.wvr.c that has 3 procedures, 24 locations, 25 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 20:16:02,279 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:16:02,311 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:16:02,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2025-04-13 20:16:02,361 INFO L116 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-04-13 20:16:02,362 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:16:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-04-13 20:16:02,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2025-04-13 20:16:02,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2025-04-13 20:16:02,374 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:16:02,381 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;@10f060e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:16:02,381 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:16:02,387 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:16:02,388 INFO L116 PetriNetUnfolderBase]: 4/23 cut-off events. [2025-04-13 20:16:02,388 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:16:02,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:02,388 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:02,388 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 20:16:02,394 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash -766473203, now seen corresponding path program 1 times [2025-04-13 20:16:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:02,401 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527293723] [2025-04-13 20:16:02,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:16:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:02,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 20:16:02,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 20:16:02,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:16:02,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:02,588 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 20:16:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:02,588 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527293723] [2025-04-13 20:16:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527293723] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:02,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:02,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:16:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811802050] [2025-04-13 20:16:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:02,595 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:16:02,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:02,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:16:02,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:16:02,622 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 27 [2025-04-13 20:16:02,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20:16:02,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:02,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 27 [2025-04-13 20:16:02,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:02,743 INFO L116 PetriNetUnfolderBase]: 179/298 cut-off events. [2025-04-13 20:16:02,743 INFO L117 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-04-13 20:16:02,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 298 events. 179/298 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 946 event pairs, 34 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 560. Up to 247 conditions per place. [2025-04-13 20:16:02,748 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 29 selfloop transitions, 5 changer transitions 1/35 dead transitions. [2025-04-13 20:16:02,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 35 transitions, 161 flow [2025-04-13 20:16:02,749 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:16:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:16:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2025-04-13 20:16:02,756 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2025-04-13 20:16:02,757 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 42 transitions. [2025-04-13 20:16:02,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 35 transitions, 161 flow [2025-04-13 20:16:02,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:16:02,762 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 77 flow [2025-04-13 20:16:02,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2025-04-13 20:16:02,782 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2025-04-13 20:16:02,782 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 77 flow [2025-04-13 20:16:02,782 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20:16:02,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:02,782 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:02,782 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:16:02,782 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 20:16:02,783 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1582326329, now seen corresponding path program 1 times [2025-04-13 20:16:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:02,783 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075891342] [2025-04-13 20:16:02,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:16:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:02,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:16:02,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:16:02,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:16:02,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:02,909 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 20:16:02,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:02,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075891342] [2025-04-13 20:16:02,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075891342] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:02,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:02,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:16:02,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046902136] [2025-04-13 20:16:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:02,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:16:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:02,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:16:02,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:16:02,911 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2025-04-13 20:16:02,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:16:02,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:02,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2025-04-13 20:16:02,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:03,051 INFO L116 PetriNetUnfolderBase]: 143/289 cut-off events. [2025-04-13 20:16:03,052 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 20:16:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 289 events. 143/289 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1162 event pairs, 15 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 176. Up to 88 conditions per place. [2025-04-13 20:16:03,054 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 41 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2025-04-13 20:16:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 55 transitions, 250 flow [2025-04-13 20:16:03,054 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:16:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:16:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2025-04-13 20:16:03,055 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2025-04-13 20:16:03,055 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 77 flow. Second operand 5 states and 77 transitions. [2025-04-13 20:16:03,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 55 transitions, 250 flow [2025-04-13 20:16:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:16:03,057 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 130 flow [2025-04-13 20:16:03,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2025-04-13 20:16:03,057 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2025-04-13 20:16:03,057 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 130 flow [2025-04-13 20:16:03,058 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:16:03,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:03,058 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:03,058 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:16:03,058 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 20:16:03,058 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -278009919, now seen corresponding path program 2 times [2025-04-13 20:16:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:03,058 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521177593] [2025-04-13 20:16:03,058 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:16:03,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:03,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:16:03,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:16:03,075 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:16:03,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:03,144 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 20:16:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:03,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521177593] [2025-04-13 20:16:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521177593] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:03,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:16:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370405291] [2025-04-13 20:16:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:03,145 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:16:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:03,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:16:03,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:16:03,145 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2025-04-13 20:16:03,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:16:03,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:03,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2025-04-13 20:16:03,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:03,257 INFO L116 PetriNetUnfolderBase]: 137/268 cut-off events. [2025-04-13 20:16:03,258 INFO L117 PetriNetUnfolderBase]: For 169/173 co-relation queries the response was YES. [2025-04-13 20:16:03,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 268 events. 137/268 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 991 event pairs, 19 based on Foata normal form. 6/271 useless extension candidates. Maximal degree in co-relation 207. Up to 126 conditions per place. [2025-04-13 20:16:03,262 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 35 selfloop transitions, 13 changer transitions 4/56 dead transitions. [2025-04-13 20:16:03,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 319 flow [2025-04-13 20:16:03,262 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:16:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:16:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-04-13 20:16:03,263 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-04-13 20:16:03,263 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 130 flow. Second operand 5 states and 72 transitions. [2025-04-13 20:16:03,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 319 flow [2025-04-13 20:16:03,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:16:03,265 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 195 flow [2025-04-13 20:16:03,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2025-04-13 20:16:03,267 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2025-04-13 20:16:03,267 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 195 flow [2025-04-13 20:16:03,267 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:16:03,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:03,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:03,267 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:16:03,267 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 20:16:03,267 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash -417512765, now seen corresponding path program 1 times [2025-04-13 20:16:03,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:03,268 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052679951] [2025-04-13 20:16:03,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:16:03,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:03,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:16:03,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:16:03,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:16:03,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:03,334 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 20:16:03,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:03,334 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052679951] [2025-04-13 20:16:03,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052679951] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:03,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:03,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:16:03,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775359541] [2025-04-13 20:16:03,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:03,334 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:16:03,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:03,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:16:03,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:16:03,335 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2025-04-13 20:16:03,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:03,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:03,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2025-04-13 20:16:03,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:03,447 INFO L116 PetriNetUnfolderBase]: 132/281 cut-off events. [2025-04-13 20:16:03,448 INFO L117 PetriNetUnfolderBase]: For 427/431 co-relation queries the response was YES. [2025-04-13 20:16:03,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 281 events. 132/281 cut-off events. For 427/431 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1062 event pairs, 15 based on Foata normal form. 12/291 useless extension candidates. Maximal degree in co-relation 253. Up to 101 conditions per place. [2025-04-13 20:16:03,449 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 46 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2025-04-13 20:16:03,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 390 flow [2025-04-13 20:16:03,450 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:16:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:16:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-04-13 20:16:03,450 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-04-13 20:16:03,450 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 195 flow. Second operand 5 states and 72 transitions. [2025-04-13 20:16:03,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 390 flow [2025-04-13 20:16:03,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 377 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-13 20:16:03,453 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 220 flow [2025-04-13 20:16:03,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-04-13 20:16:03,453 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2025-04-13 20:16:03,453 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 220 flow [2025-04-13 20:16:03,453 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:03,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:03,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:03,454 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:16:03,454 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:16:03,454 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash -884998153, now seen corresponding path program 2 times [2025-04-13 20:16:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:03,454 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339813603] [2025-04-13 20:16:03,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:16:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:03,458 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:16:03,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:16:03,461 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:16:03,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:03,509 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 20:16:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:03,509 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339813603] [2025-04-13 20:16:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339813603] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:03,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:03,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:16:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407167013] [2025-04-13 20:16:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:03,510 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:16:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:03,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:16:03,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:16:03,510 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2025-04-13 20:16:03,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:03,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:03,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2025-04-13 20:16:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:03,596 INFO L116 PetriNetUnfolderBase]: 123/253 cut-off events. [2025-04-13 20:16:03,596 INFO L117 PetriNetUnfolderBase]: For 490/494 co-relation queries the response was YES. [2025-04-13 20:16:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 253 events. 123/253 cut-off events. For 490/494 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 885 event pairs, 18 based on Foata normal form. 7/258 useless extension candidates. Maximal degree in co-relation 434. Up to 136 conditions per place. [2025-04-13 20:16:03,597 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 39 selfloop transitions, 10 changer transitions 4/57 dead transitions. [2025-04-13 20:16:03,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 389 flow [2025-04-13 20:16:03,598 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:16:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:16:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2025-04-13 20:16:03,598 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2025-04-13 20:16:03,598 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 220 flow. Second operand 5 states and 68 transitions. [2025-04-13 20:16:03,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 389 flow [2025-04-13 20:16:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 372 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:16:03,601 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 249 flow [2025-04-13 20:16:03,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2025-04-13 20:16:03,601 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2025-04-13 20:16:03,601 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 249 flow [2025-04-13 20:16:03,603 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:03,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:03,604 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 20:16:03,604 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:16:03,604 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:16:03,604 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 191901249, now seen corresponding path program 1 times [2025-04-13 20:16:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:03,604 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112669609] [2025-04-13 20:16:03,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:16:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:03,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:16:03,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:16:03,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:16:03,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:03,774 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 20:16:03,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:03,774 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112669609] [2025-04-13 20:16:03,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112669609] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:03,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:03,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:16:03,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577078598] [2025-04-13 20:16:03,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:03,775 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:16:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:03,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:16:03,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:16:03,780 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 27 [2025-04-13 20:16:03,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 20:16:03,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:03,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 27 [2025-04-13 20:16:03,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:03,883 INFO L116 PetriNetUnfolderBase]: 241/434 cut-off events. [2025-04-13 20:16:03,883 INFO L117 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2025-04-13 20:16:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1472 conditions, 434 events. 241/434 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1603 event pairs, 60 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 1111. Up to 172 conditions per place. [2025-04-13 20:16:03,895 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 46 selfloop transitions, 11 changer transitions 21/78 dead transitions. [2025-04-13 20:16:03,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 621 flow [2025-04-13 20:16:03,895 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:16:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:16:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-04-13 20:16:03,896 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2025-04-13 20:16:03,896 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 249 flow. Second operand 5 states and 59 transitions. [2025-04-13 20:16:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 621 flow [2025-04-13 20:16:03,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 78 transitions, 589 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-04-13 20:16:03,899 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 272 flow [2025-04-13 20:16:03,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2025-04-13 20:16:03,899 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2025-04-13 20:16:03,899 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 272 flow [2025-04-13 20:16:03,899 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 20:16:03,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:03,899 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 20:16:03,900 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:16:03,900 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:16:03,900 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1007417639, now seen corresponding path program 2 times [2025-04-13 20:16:03,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:03,900 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174312971] [2025-04-13 20:16:03,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:16:03,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:03,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:16:03,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:16:03,912 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:16:03,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:04,030 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 20:16:04,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:04,030 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174312971] [2025-04-13 20:16:04,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174312971] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:16:04,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:16:04,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:16:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956975441] [2025-04-13 20:16:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:16:04,031 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:16:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:04,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:16:04,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-04-13 20:16:04,035 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 27 [2025-04-13 20:16:04,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:16:04,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:04,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 27 [2025-04-13 20:16:04,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:04,151 INFO L116 PetriNetUnfolderBase]: 230/412 cut-off events. [2025-04-13 20:16:04,151 INFO L117 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2025-04-13 20:16:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 412 events. 230/412 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1480 event pairs, 50 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 1192. Up to 170 conditions per place. [2025-04-13 20:16:04,152 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 0 selfloop transitions, 0 changer transitions 63/63 dead transitions. [2025-04-13 20:16:04,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 507 flow [2025-04-13 20:16:04,153 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:16:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:16:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2025-04-13 20:16:04,153 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32098765432098764 [2025-04-13 20:16:04,153 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 272 flow. Second operand 6 states and 52 transitions. [2025-04-13 20:16:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 507 flow [2025-04-13 20:16:04,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 484 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-04-13 20:16:04,156 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2025-04-13 20:16:04,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2025-04-13 20:16:04,156 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2025-04-13 20:16:04,156 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2025-04-13 20:16:04,156 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:16:04,158 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 20:16:04,158 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 20:16:04,158 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 20:16:04,158 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 20:16:04,159 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1] [2025-04-13 20:16:04,160 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:16:04,161 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:16:04,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:16:04 BasicIcfg [2025-04-13 20:16:04,164 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:16:04,164 INFO L158 Benchmark]: Toolchain (without parser) took 2480.25ms. Allocated memory is still 155.2MB. Free memory was 107.4MB in the beginning and 64.5MB in the end (delta: 42.8MB). Peak memory consumption was 40.3MB. Max. memory is 8.0GB. [2025-04-13 20:16:04,164 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:16:04,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.12ms. Allocated memory is still 155.2MB. Free memory was 107.4MB in the beginning and 92.9MB in the end (delta: 14.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:16:04,165 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.04ms. Allocated memory is still 155.2MB. Free memory was 92.9MB in the beginning and 91.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:16:04,165 INFO L158 Benchmark]: Boogie Preprocessor took 33.93ms. Allocated memory is still 155.2MB. Free memory was 91.4MB in the beginning and 90.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:16:04,165 INFO L158 Benchmark]: RCFGBuilder took 308.46ms. Allocated memory is still 155.2MB. Free memory was 89.3MB in the beginning and 66.2MB in the end (delta: 23.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 20:16:04,165 INFO L158 Benchmark]: TraceAbstraction took 1899.17ms. Allocated memory is still 155.2MB. Free memory was 65.5MB in the beginning and 64.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:16:04,166 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 85.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.12ms. Allocated memory is still 155.2MB. Free memory was 107.4MB in the beginning and 92.9MB in the end (delta: 14.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.04ms. Allocated memory is still 155.2MB. Free memory was 92.9MB in the beginning and 91.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.93ms. Allocated memory is still 155.2MB. Free memory was 91.4MB in the beginning and 90.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 308.46ms. Allocated memory is still 155.2MB. Free memory was 89.3MB in the beginning and 66.2MB in the end (delta: 23.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 1899.17ms. Allocated memory is still 155.2MB. Free memory was 65.5MB in the beginning and 64.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 78]: 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, 38 locations, 45 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: 1.8s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 127 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 122 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 581 IncrementalHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 5 mSDtfsCounter, 581 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=272occurred in iteration=6, InterpolantAutomatonStates: 34, 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, 0.6s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 537 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 20:16:04,181 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...