/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:39:23,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:39:24,023 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:39:24,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:39:24,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:39:24,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:39:24,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:39:24,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:39:24,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:39:24,049 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:39:24,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:39:24,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:39:24,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:39:24,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:39:24,050 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:39:24,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:39:24,051 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:39:24,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:39:24,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:39:24,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:39:24,052 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:39:24,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:39:24,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:39:24,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:39:24,276 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:39:24,277 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:39:24,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2025-04-13 19:39:25,555 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dacd9d5bf/c5a2dbc3dcd444059aab00b780968f87/FLAGe44031d66 [2025-04-13 19:39:25,831 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:39:25,833 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2025-04-13 19:39:25,845 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dacd9d5bf/c5a2dbc3dcd444059aab00b780968f87/FLAGe44031d66 [2025-04-13 19:39:26,556 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dacd9d5bf/c5a2dbc3dcd444059aab00b780968f87 [2025-04-13 19:39:26,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:39:26,559 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:39:26,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:39:26,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:39:26,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:39:26,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:39:26" (1/1) ... [2025-04-13 19:39:26,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9db188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:26, skipping insertion in model container [2025-04-13 19:39:26,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:39:26" (1/1) ... [2025-04-13 19:39:26,599 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:39:26,750 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-04-13 19:39:26,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:39:26,943 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:39:26,956 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-04-13 19:39:26,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:39:27,043 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:39:27,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27 WrapperNode [2025-04-13 19:39:27,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:39:27,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:39:27,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:39:27,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:39:27,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,078 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2025-04-13 19:39:27,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:39:27,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:39:27,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:39:27,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:39:27,083 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,104 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2025-04-13 19:39:27,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,110 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:39:27,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:39:27,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:39:27,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:39:27,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (1/1) ... [2025-04-13 19:39:27,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:39:27,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:27,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 19:39:27,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 19:39:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 19:39:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 19:39:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:39:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2025-04-13 19:39:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2025-04-13 19:39:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:39:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:39:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:39:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:39:27,172 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:39:27,264 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:39:27,265 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:39:27,364 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:39:27,365 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:39:27,365 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:39:27,473 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:39:27,476 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:39:27,478 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:39:27,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:39:27 BoogieIcfgContainer [2025-04-13 19:39:27,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:39:27,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:39:27,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:39:27,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:39:27,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:39:26" (1/3) ... [2025-04-13 19:39:27,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6deddaac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:39:27, skipping insertion in model container [2025-04-13 19:39:27,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:39:27" (2/3) ... [2025-04-13 19:39:27,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6deddaac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:39:27, skipping insertion in model container [2025-04-13 19:39:27,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:39:27" (3/3) ... [2025-04-13 19:39:27,484 INFO L128 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2025-04-13 19:39:27,493 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:39:27,494 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pthread-demo-datarace-1.i that has 2 procedures, 17 locations, 19 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 19:39:27,495 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:39:27,528 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-04-13 19:39:27,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 47 flow [2025-04-13 19:39:27,585 INFO L116 PetriNetUnfolderBase]: 4/19 cut-off events. [2025-04-13 19:39:27,586 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:39:27,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 19 events. 4/19 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-04-13 19:39:27,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 20 transitions, 47 flow [2025-04-13 19:39:27,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 18 transitions, 42 flow [2025-04-13 19:39:27,595 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:39:27,602 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;@3e9651bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:39:27,604 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-13 19:39:27,610 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:39:27,611 INFO L116 PetriNetUnfolderBase]: 0/11 cut-off events. [2025-04-13 19:39:27,611 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:39:27,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:27,611 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-13 19:39:27,611 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:27,615 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1182847637, now seen corresponding path program 1 times [2025-04-13 19:39:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:27,622 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865192469] [2025-04-13 19:39:27,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:39:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:27,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:39:27,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:39:27,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:27,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:27,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:27,767 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865192469] [2025-04-13 19:39:27,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865192469] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:27,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:27,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:39:27,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086761223] [2025-04-13 19:39:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:27,773 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 19:39:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:27,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 19:39:27,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 19:39:27,792 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:27,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:27,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:27,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:27,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:27,843 INFO L116 PetriNetUnfolderBase]: 37/76 cut-off events. [2025-04-13 19:39:27,843 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:39:27,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 76 events. 37/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 152 event pairs, 25 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 144. Up to 77 conditions per place. [2025-04-13 19:39:27,845 INFO L140 encePairwiseOnDemand]: 18/20 looper letters, 16 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2025-04-13 19:39:27,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 16 transitions, 70 flow [2025-04-13 19:39:27,847 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 19:39:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 19:39:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 20 transitions. [2025-04-13 19:39:27,856 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:39:27,858 INFO L175 Difference]: Start difference. First operand has 18 places, 18 transitions, 42 flow. Second operand 2 states and 20 transitions. [2025-04-13 19:39:27,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 16 transitions, 70 flow [2025-04-13 19:39:27,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:39:27,862 INFO L231 Difference]: Finished difference. Result has 17 places, 16 transitions, 34 flow [2025-04-13 19:39:27,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=34, PETRI_PLACES=17, PETRI_TRANSITIONS=16} [2025-04-13 19:39:27,868 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2025-04-13 19:39:27,868 INFO L485 AbstractCegarLoop]: Abstraction has has 17 places, 16 transitions, 34 flow [2025-04-13 19:39:27,868 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:27,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:27,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:27,868 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:39:27,869 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:27,870 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2122109450, now seen corresponding path program 1 times [2025-04-13 19:39:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:27,870 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64415902] [2025-04-13 19:39:27,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:39:27,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:27,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:39:27,883 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:39:27,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:27,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:28,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:28,002 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64415902] [2025-04-13 19:39:28,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64415902] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:28,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:28,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:39:28,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73247902] [2025-04-13 19:39:28,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:28,003 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:39:28,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:28,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:39:28,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:39:28,004 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:28,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 16 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:28,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:28,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:28,059 INFO L116 PetriNetUnfolderBase]: 29/64 cut-off events. [2025-04-13 19:39:28,059 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:39:28,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 64 events. 29/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 9 based on Foata normal form. 4/56 useless extension candidates. Maximal degree in co-relation 129. Up to 37 conditions per place. [2025-04-13 19:39:28,060 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2025-04-13 19:39:28,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 22 transitions, 90 flow [2025-04-13 19:39:28,061 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:39:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:39:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-04-13 19:39:28,062 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-04-13 19:39:28,062 INFO L175 Difference]: Start difference. First operand has 17 places, 16 transitions, 34 flow. Second operand 3 states and 27 transitions. [2025-04-13 19:39:28,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 22 transitions, 90 flow [2025-04-13 19:39:28,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 19:39:28,063 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 42 flow [2025-04-13 19:39:28,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2025-04-13 19:39:28,063 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2025-04-13 19:39:28,064 INFO L485 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 42 flow [2025-04-13 19:39:28,064 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:28,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:28,064 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:39:28,064 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:28,064 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1728862990, now seen corresponding path program 2 times [2025-04-13 19:39:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:28,067 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364241821] [2025-04-13 19:39:28,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:39:28,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:28,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 1 equivalence classes. [2025-04-13 19:39:28,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:39:28,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 19:39:28,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:28,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:28,127 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364241821] [2025-04-13 19:39:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364241821] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:28,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:28,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:39:28,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132622174] [2025-04-13 19:39:28,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:28,127 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:39:28,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:28,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:39:28,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:39:28,128 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:28,185 INFO L116 PetriNetUnfolderBase]: 45/100 cut-off events. [2025-04-13 19:39:28,186 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-13 19:39:28,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 100 events. 45/100 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 15 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 229. Up to 65 conditions per place. [2025-04-13 19:39:28,188 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2025-04-13 19:39:28,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 122 flow [2025-04-13 19:39:28,189 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:39:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:39:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2025-04-13 19:39:28,189 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:39:28,189 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 42 flow. Second operand 3 states and 30 transitions. [2025-04-13 19:39:28,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 122 flow [2025-04-13 19:39:28,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 26 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:39:28,191 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 50 flow [2025-04-13 19:39:28,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2025-04-13 19:39:28,191 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2025-04-13 19:39:28,192 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 50 flow [2025-04-13 19:39:28,192 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:28,192 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:28,192 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:39:28,192 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:28,192 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1457783560, now seen corresponding path program 1 times [2025-04-13 19:39:28,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:28,193 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683246313] [2025-04-13 19:39:28,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:39:28,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:28,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 19:39:28,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 19:39:28,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:28,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 19:39:28,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:28,244 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683246313] [2025-04-13 19:39:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683246313] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:28,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:39:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050112215] [2025-04-13 19:39:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:28,244 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:39:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:28,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:39:28,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:39:28,245 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:28,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:28,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:28,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:28,300 INFO L116 PetriNetUnfolderBase]: 69/156 cut-off events. [2025-04-13 19:39:28,300 INFO L117 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2025-04-13 19:39:28,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 156 events. 69/156 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 437 event pairs, 25 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 387. Up to 101 conditions per place. [2025-04-13 19:39:28,301 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2025-04-13 19:39:28,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 142 flow [2025-04-13 19:39:28,303 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:39:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:39:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2025-04-13 19:39:28,304 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 19:39:28,304 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 50 flow. Second operand 3 states and 30 transitions. [2025-04-13 19:39:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 142 flow [2025-04-13 19:39:28,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:39:28,305 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 60 flow [2025-04-13 19:39:28,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2025-04-13 19:39:28,306 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2025-04-13 19:39:28,306 INFO L485 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 60 flow [2025-04-13 19:39:28,306 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:28,306 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:28,306 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:39:28,306 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:28,308 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash -576551429, now seen corresponding path program 1 times [2025-04-13 19:39:28,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:28,308 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146360881] [2025-04-13 19:39:28,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:39:28,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:28,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 19:39:28,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 19:39:28,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:28,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 19:39:28,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:28,403 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146360881] [2025-04-13 19:39:28,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146360881] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:28,403 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671555225] [2025-04-13 19:39:28,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:39:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:28,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:28,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 19:39:28,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 19:39:28,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 19:39:28,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:28,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:28,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-13 19:39:28,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 19:39:28,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 19:39:28,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671555225] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:28,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:28,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-04-13 19:39:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120511304] [2025-04-13 19:39:28,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:28,584 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 19:39:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:28,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 19:39:28,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-04-13 19:39:28,585 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:28,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 60 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:28,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:28,788 INFO L116 PetriNetUnfolderBase]: 189/440 cut-off events. [2025-04-13 19:39:28,788 INFO L117 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-04-13 19:39:28,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 440 events. 189/440 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1586 event pairs, 13 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 1187. Up to 89 conditions per place. [2025-04-13 19:39:28,790 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 110 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2025-04-13 19:39:28,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 140 transitions, 724 flow [2025-04-13 19:39:28,791 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 19:39:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 19:39:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 170 transitions. [2025-04-13 19:39:28,792 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.53125 [2025-04-13 19:39:28,792 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 60 flow. Second operand 16 states and 170 transitions. [2025-04-13 19:39:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 140 transitions, 724 flow [2025-04-13 19:39:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 140 transitions, 714 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:39:28,794 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 318 flow [2025-04-13 19:39:28,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=318, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2025-04-13 19:39:28,795 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 30 predicate places. [2025-04-13 19:39:28,795 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 318 flow [2025-04-13 19:39:28,795 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:28,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:28,795 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:28,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 19:39:28,995 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:28,996 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:28,996 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash 78670404, now seen corresponding path program 2 times [2025-04-13 19:39:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:28,996 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165860372] [2025-04-13 19:39:28,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:39:28,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:29,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-04-13 19:39:29,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-04-13 19:39:29,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:39:29,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-04-13 19:39:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:29,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165860372] [2025-04-13 19:39:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165860372] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:29,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621836616] [2025-04-13 19:39:29,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:39:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:29,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 19:39:29,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-04-13 19:39:29,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-04-13 19:39:29,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:39:29,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:29,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 19:39:29,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-04-13 19:39:29,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-04-13 19:39:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621836616] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:29,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:29,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-04-13 19:39:29,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023111558] [2025-04-13 19:39:29,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:29,274 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 19:39:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:29,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 19:39:29,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-04-13 19:39:29,274 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:29,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:29,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:29,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:29,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:29,434 INFO L116 PetriNetUnfolderBase]: 381/904 cut-off events. [2025-04-13 19:39:29,435 INFO L117 PetriNetUnfolderBase]: For 4528/4528 co-relation queries the response was YES. [2025-04-13 19:39:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3719 conditions, 904 events. 381/904 cut-off events. For 4528/4528 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3748 event pairs, 72 based on Foata normal form. 0/882 useless extension candidates. Maximal degree in co-relation 3701. Up to 209 conditions per place. [2025-04-13 19:39:29,442 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 97 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2025-04-13 19:39:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 116 transitions, 1002 flow [2025-04-13 19:39:29,442 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 19:39:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 19:39:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2025-04-13 19:39:29,443 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-04-13 19:39:29,443 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 318 flow. Second operand 8 states and 88 transitions. [2025-04-13 19:39:29,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 116 transitions, 1002 flow [2025-04-13 19:39:29,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 116 transitions, 926 flow, removed 26 selfloop flow, removed 2 redundant places. [2025-04-13 19:39:29,456 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 390 flow [2025-04-13 19:39:29,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2025-04-13 19:39:29,456 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2025-04-13 19:39:29,456 INFO L485 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 390 flow [2025-04-13 19:39:29,457 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:29,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:29,457 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:29,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 19:39:29,657 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-13 19:39:29,658 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:29,661 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1177309032, now seen corresponding path program 3 times [2025-04-13 19:39:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:29,661 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158972981] [2025-04-13 19:39:29,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:39:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:29,676 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 7 equivalence classes. [2025-04-13 19:39:29,693 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 46 of 54 statements. [2025-04-13 19:39:29,694 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-04-13 19:39:29,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-04-13 19:39:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:29,795 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158972981] [2025-04-13 19:39:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158972981] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:29,795 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382059458] [2025-04-13 19:39:29,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:39:29,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:29,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:29,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:29,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 19:39:29,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 7 equivalence classes. [2025-04-13 19:39:29,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 46 of 54 statements. [2025-04-13 19:39:29,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-04-13 19:39:29,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:29,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-13 19:39:29,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-04-13 19:39:29,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-04-13 19:39:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382059458] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:29,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-04-13 19:39:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300930954] [2025-04-13 19:39:29,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:29,984 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-13 19:39:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:29,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-13 19:39:29,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-04-13 19:39:29,984 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:29,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 390 flow. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:29,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:29,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:29,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:30,280 INFO L116 PetriNetUnfolderBase]: 765/1840 cut-off events. [2025-04-13 19:39:30,281 INFO L117 PetriNetUnfolderBase]: For 21868/21868 co-relation queries the response was YES. [2025-04-13 19:39:30,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 1840 events. 765/1840 cut-off events. For 21868/21868 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8806 event pairs, 82 based on Foata normal form. 180/2020 useless extension candidates. Maximal degree in co-relation 7669. Up to 368 conditions per place. [2025-04-13 19:39:30,294 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 173 selfloop transitions, 33 changer transitions 0/206 dead transitions. [2025-04-13 19:39:30,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 206 transitions, 2298 flow [2025-04-13 19:39:30,295 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:39:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:39:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2025-04-13 19:39:30,296 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2025-04-13 19:39:30,296 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 390 flow. Second operand 12 states and 134 transitions. [2025-04-13 19:39:30,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 206 transitions, 2298 flow [2025-04-13 19:39:30,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 206 transitions, 1990 flow, removed 132 selfloop flow, removed 2 redundant places. [2025-04-13 19:39:30,312 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 574 flow [2025-04-13 19:39:30,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=574, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2025-04-13 19:39:30,314 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 54 predicate places. [2025-04-13 19:39:30,314 INFO L485 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 574 flow [2025-04-13 19:39:30,314 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:30,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:30,314 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:30,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 19:39:30,515 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:30,515 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:30,516 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -568814936, now seen corresponding path program 4 times [2025-04-13 19:39:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:30,516 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789355482] [2025-04-13 19:39:30,516 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:39:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:30,532 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-04-13 19:39:30,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-04-13 19:39:30,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:39:30,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-04-13 19:39:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:30,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789355482] [2025-04-13 19:39:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789355482] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:30,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505316198] [2025-04-13 19:39:30,824 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:39:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:30,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:30,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 19:39:30,891 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-04-13 19:39:30,946 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-04-13 19:39:30,947 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:39:30,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:30,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-13 19:39:30,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-04-13 19:39:31,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-04-13 19:39:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505316198] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:31,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2025-04-13 19:39:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094687001] [2025-04-13 19:39:31,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:31,250 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-13 19:39:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:31,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-13 19:39:31,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2025-04-13 19:39:31,251 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:31,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 574 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:31,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:31,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:31,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:31,884 INFO L116 PetriNetUnfolderBase]: 1341/3244 cut-off events. [2025-04-13 19:39:31,884 INFO L117 PetriNetUnfolderBase]: For 53816/53816 co-relation queries the response was YES. [2025-04-13 19:39:31,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13211 conditions, 3244 events. 1341/3244 cut-off events. For 53816/53816 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 16167 event pairs, 82 based on Foata normal form. 270/3514 useless extension candidates. Maximal degree in co-relation 13181. Up to 656 conditions per place. [2025-04-13 19:39:31,906 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 308 selfloop transitions, 60 changer transitions 0/368 dead transitions. [2025-04-13 19:39:31,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 368 transitions, 3730 flow [2025-04-13 19:39:31,906 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 19:39:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 19:39:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 236 transitions. [2025-04-13 19:39:31,907 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2025-04-13 19:39:31,908 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 574 flow. Second operand 21 states and 236 transitions. [2025-04-13 19:39:31,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 368 transitions, 3730 flow [2025-04-13 19:39:31,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 368 transitions, 3670 flow, removed 18 selfloop flow, removed 4 redundant places. [2025-04-13 19:39:31,929 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 928 flow [2025-04-13 19:39:31,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=928, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2025-04-13 19:39:31,930 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 79 predicate places. [2025-04-13 19:39:31,930 INFO L485 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 928 flow [2025-04-13 19:39:31,930 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:31,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:31,930 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 19, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:31,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 19:39:32,134 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:32,134 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:32,135 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash 429495382, now seen corresponding path program 5 times [2025-04-13 19:39:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:32,135 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464802006] [2025-04-13 19:39:32,135 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:39:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:32,157 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 114 statements into 20 equivalence classes. [2025-04-13 19:39:32,206 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 114 of 114 statements. [2025-04-13 19:39:32,207 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-04-13 19:39:32,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2025-04-13 19:39:32,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:32,365 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464802006] [2025-04-13 19:39:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464802006] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:32,365 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67896194] [2025-04-13 19:39:32,365 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:39:32,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:32,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:32,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 19:39:32,436 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 114 statements into 20 equivalence classes. [2025-04-13 19:39:32,553 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 114 of 114 statements. [2025-04-13 19:39:32,554 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-04-13 19:39:32,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:32,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-13 19:39:32,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2025-04-13 19:39:32,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2025-04-13 19:39:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67896194] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:32,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:32,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-04-13 19:39:32,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662571471] [2025-04-13 19:39:32,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:32,711 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 19:39:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:32,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 19:39:32,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-04-13 19:39:32,712 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:32,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 928 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:32,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:32,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:33,550 INFO L116 PetriNetUnfolderBase]: 2685/6572 cut-off events. [2025-04-13 19:39:33,551 INFO L117 PetriNetUnfolderBase]: For 93150/93150 co-relation queries the response was YES. [2025-04-13 19:39:33,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29611 conditions, 6572 events. 2685/6572 cut-off events. For 93150/93150 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 39955 event pairs, 206 based on Foata normal form. 656/7228 useless extension candidates. Maximal degree in co-relation 29571. Up to 1312 conditions per place. [2025-04-13 19:39:33,593 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 426 selfloop transitions, 27 changer transitions 0/453 dead transitions. [2025-04-13 19:39:33,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 453 transitions, 5530 flow [2025-04-13 19:39:33,593 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 19:39:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 19:39:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 180 transitions. [2025-04-13 19:39:33,594 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-04-13 19:39:33,594 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 928 flow. Second operand 16 states and 180 transitions. [2025-04-13 19:39:33,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 453 transitions, 5530 flow [2025-04-13 19:39:33,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 453 transitions, 4630 flow, removed 285 selfloop flow, removed 11 redundant places. [2025-04-13 19:39:33,641 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 964 flow [2025-04-13 19:39:33,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=964, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2025-04-13 19:39:33,642 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 91 predicate places. [2025-04-13 19:39:33,642 INFO L485 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 964 flow [2025-04-13 19:39:33,642 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:33,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:33,642 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 19, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:33,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 19:39:33,842 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:33,843 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:33,844 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1218377262, now seen corresponding path program 6 times [2025-04-13 19:39:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:33,844 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847220226] [2025-04-13 19:39:33,844 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 19:39:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:33,862 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 15 equivalence classes. [2025-04-13 19:39:33,963 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 146 of 146 statements. [2025-04-13 19:39:33,964 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-04-13 19:39:33,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2025-04-13 19:39:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:34,348 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847220226] [2025-04-13 19:39:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847220226] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:34,349 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871670461] [2025-04-13 19:39:34,349 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 19:39:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:34,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:34,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 19:39:34,436 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 15 equivalence classes. [2025-04-13 19:39:34,784 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 146 of 146 statements. [2025-04-13 19:39:34,784 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-04-13 19:39:34,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:34,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-13 19:39:34,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2025-04-13 19:39:34,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2025-04-13 19:39:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871670461] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:35,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:35,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2025-04-13 19:39:35,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596294170] [2025-04-13 19:39:35,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:35,166 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-13 19:39:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:35,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-13 19:39:35,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2025-04-13 19:39:35,169 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:35,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 964 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:35,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:35,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:36,456 INFO L116 PetriNetUnfolderBase]: 3525/8652 cut-off events. [2025-04-13 19:39:36,456 INFO L117 PetriNetUnfolderBase]: For 163131/163131 co-relation queries the response was YES. [2025-04-13 19:39:36,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39893 conditions, 8652 events. 3525/8652 cut-off events. For 163131/163131 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 54303 event pairs, 206 based on Foata normal form. 410/9062 useless extension candidates. Maximal degree in co-relation 39845. Up to 1722 conditions per place. [2025-04-13 19:39:36,500 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 566 selfloop transitions, 32 changer transitions 0/598 dead transitions. [2025-04-13 19:39:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 598 transitions, 6228 flow [2025-04-13 19:39:36,501 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 19:39:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 19:39:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 232 transitions. [2025-04-13 19:39:36,502 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2025-04-13 19:39:36,502 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 964 flow. Second operand 21 states and 232 transitions. [2025-04-13 19:39:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 598 transitions, 6228 flow [2025-04-13 19:39:36,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 598 transitions, 6114 flow, removed 38 selfloop flow, removed 7 redundant places. [2025-04-13 19:39:36,570 INFO L231 Difference]: Finished difference. Result has 127 places, 108 transitions, 1026 flow [2025-04-13 19:39:36,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1026, PETRI_PLACES=127, PETRI_TRANSITIONS=108} [2025-04-13 19:39:36,571 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2025-04-13 19:39:36,571 INFO L485 AbstractCegarLoop]: Abstraction has has 127 places, 108 transitions, 1026 flow [2025-04-13 19:39:36,571 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:36,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:36,571 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:36,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-13 19:39:36,775 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:36,775 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:36,776 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1043836181, now seen corresponding path program 7 times [2025-04-13 19:39:36,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:36,776 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136959017] [2025-04-13 19:39:36,776 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 19:39:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:36,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 166 statements into 1 equivalence classes. [2025-04-13 19:39:36,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 166 of 166 statements. [2025-04-13 19:39:36,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:36,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:38,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136959017] [2025-04-13 19:39:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136959017] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:39:38,914 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347820689] [2025-04-13 19:39:38,914 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 19:39:38,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:38,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:39:38,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 19:39:38,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 19:39:39,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 166 statements into 1 equivalence classes. [2025-04-13 19:39:39,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 166 of 166 statements. [2025-04-13 19:39:39,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:39:39,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:39,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-04-13 19:39:39,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:39:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:39,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:39:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:39:39,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347820689] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:39:39,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:39:39,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 41 [2025-04-13 19:39:39,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852640877] [2025-04-13 19:39:39,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:39:39,390 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-04-13 19:39:39,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:39,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-04-13 19:39:39,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2025-04-13 19:39:39,392 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:39,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 108 transitions, 1026 flow. Second operand has 43 states, 43 states have (on average 4.8604651162790695) internal successors, (209), 43 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:39,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:39,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:39,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:46,263 INFO L116 PetriNetUnfolderBase]: 9086/21685 cut-off events. [2025-04-13 19:39:46,263 INFO L117 PetriNetUnfolderBase]: For 675259/675259 co-relation queries the response was YES. [2025-04-13 19:39:46,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129857 conditions, 21685 events. 9086/21685 cut-off events. For 675259/675259 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 162430 event pairs, 1394 based on Foata normal form. 1/21686 useless extension candidates. Maximal degree in co-relation 129804. Up to 5239 conditions per place. [2025-04-13 19:39:46,449 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 1677 selfloop transitions, 83 changer transitions 1/1761 dead transitions. [2025-04-13 19:39:46,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1761 transitions, 21868 flow [2025-04-13 19:39:46,450 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-13 19:39:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-13 19:39:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 509 transitions. [2025-04-13 19:39:46,451 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5918604651162791 [2025-04-13 19:39:46,451 INFO L175 Difference]: Start difference. First operand has 127 places, 108 transitions, 1026 flow. Second operand 43 states and 509 transitions. [2025-04-13 19:39:46,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1761 transitions, 21868 flow [2025-04-13 19:39:46,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 1761 transitions, 19744 flow, removed 522 selfloop flow, removed 15 redundant places. [2025-04-13 19:39:46,910 INFO L231 Difference]: Finished difference. Result has 155 places, 190 transitions, 1270 flow [2025-04-13 19:39:46,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1270, PETRI_PLACES=155, PETRI_TRANSITIONS=190} [2025-04-13 19:39:46,910 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 137 predicate places. [2025-04-13 19:39:46,910 INFO L485 AbstractCegarLoop]: Abstraction has has 155 places, 190 transitions, 1270 flow [2025-04-13 19:39:46,911 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.8604651162790695) internal successors, (209), 43 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:46,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:46,911 INFO L206 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:46,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 19:39:47,111 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:39:47,111 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:47,112 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2092405433, now seen corresponding path program 8 times [2025-04-13 19:39:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:47,112 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352433084] [2025-04-13 19:39:47,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:39:47,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:47,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 170 statements into 2 equivalence classes. [2025-04-13 19:39:47,166 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 170 of 170 statements. [2025-04-13 19:39:47,166 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:39:47,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 1737 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-04-13 19:39:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:47,731 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352433084] [2025-04-13 19:39:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352433084] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:47,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:47,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-04-13 19:39:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323419691] [2025-04-13 19:39:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:47,732 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-13 19:39:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:47,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-13 19:39:47,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2025-04-13 19:39:47,733 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:47,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 190 transitions, 1270 flow. Second operand has 22 states, 22 states have (on average 8.727272727272727) internal successors, (192), 22 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:47,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:47,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:47,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:50,108 INFO L116 PetriNetUnfolderBase]: 6230/15112 cut-off events. [2025-04-13 19:39:50,108 INFO L117 PetriNetUnfolderBase]: For 359781/359781 co-relation queries the response was YES. [2025-04-13 19:39:50,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82883 conditions, 15112 events. 6230/15112 cut-off events. For 359781/359781 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 108839 event pairs, 51 based on Foata normal form. 89/15201 useless extension candidates. Maximal degree in co-relation 82829. Up to 3460 conditions per place. [2025-04-13 19:39:50,181 INFO L140 encePairwiseOnDemand]: 18/20 looper letters, 1891 selfloop transitions, 60 changer transitions 0/1951 dead transitions. [2025-04-13 19:39:50,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1951 transitions, 16136 flow [2025-04-13 19:39:50,182 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 19:39:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 19:39:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 234 transitions. [2025-04-13 19:39:50,182 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2025-04-13 19:39:50,182 INFO L175 Difference]: Start difference. First operand has 155 places, 190 transitions, 1270 flow. Second operand 22 states and 234 transitions. [2025-04-13 19:39:50,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1951 transitions, 16136 flow [2025-04-13 19:39:50,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1951 transitions, 16130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:39:50,448 INFO L231 Difference]: Finished difference. Result has 175 places, 187 transitions, 1360 flow [2025-04-13 19:39:50,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1360, PETRI_PLACES=175, PETRI_TRANSITIONS=187} [2025-04-13 19:39:50,448 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 157 predicate places. [2025-04-13 19:39:50,448 INFO L485 AbstractCegarLoop]: Abstraction has has 175 places, 187 transitions, 1360 flow [2025-04-13 19:39:50,449 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.727272727272727) internal successors, (192), 22 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:50,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:39:50,449 INFO L206 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:39:50,449 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-04-13 19:39:50,449 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:39:50,450 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:39:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1393795976, now seen corresponding path program 9 times [2025-04-13 19:39:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:39:50,450 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241105061] [2025-04-13 19:39:50,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:39:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:39:50,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 170 statements into 21 equivalence classes. [2025-04-13 19:39:50,507 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 170 of 170 statements. [2025-04-13 19:39:50,507 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-04-13 19:39:50,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:39:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 840 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2025-04-13 19:39:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:39:50,881 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241105061] [2025-04-13 19:39:50,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241105061] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:39:50,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:39:50,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-04-13 19:39:50,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401936049] [2025-04-13 19:39:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:39:50,882 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-13 19:39:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:39:50,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-13 19:39:50,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2025-04-13 19:39:50,883 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 20 [2025-04-13 19:39:50,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 187 transitions, 1360 flow. Second operand has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:50,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:39:50,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 20 [2025-04-13 19:39:50,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:39:52,345 INFO L116 PetriNetUnfolderBase]: 3361/8487 cut-off events. [2025-04-13 19:39:52,346 INFO L117 PetriNetUnfolderBase]: For 81811/81811 co-relation queries the response was YES. [2025-04-13 19:39:52,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37888 conditions, 8487 events. 3361/8487 cut-off events. For 81811/81811 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 54465 event pairs, 49 based on Foata normal form. 82/8569 useless extension candidates. Maximal degree in co-relation 37834. Up to 1681 conditions per place. [2025-04-13 19:39:52,384 INFO L140 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 0 changer transitions 1419/1419 dead transitions. [2025-04-13 19:39:52,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1419 transitions, 11938 flow [2025-04-13 19:39:52,384 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 19:39:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 19:39:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 233 transitions. [2025-04-13 19:39:52,385 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5295454545454545 [2025-04-13 19:39:52,385 INFO L175 Difference]: Start difference. First operand has 175 places, 187 transitions, 1360 flow. Second operand 22 states and 233 transitions. [2025-04-13 19:39:52,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1419 transitions, 11938 flow [2025-04-13 19:39:52,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 1419 transitions, 11110 flow, removed 0 selfloop flow, removed 23 redundant places. [2025-04-13 19:39:52,462 INFO L231 Difference]: Finished difference. Result has 172 places, 0 transitions, 0 flow [2025-04-13 19:39:52,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=0, PETRI_PLACES=172, PETRI_TRANSITIONS=0} [2025-04-13 19:39:52,463 INFO L279 CegarLoopForPetriNet]: 18 programPoint places, 154 predicate places. [2025-04-13 19:39:52,463 INFO L485 AbstractCegarLoop]: Abstraction has has 172 places, 0 transitions, 0 flow [2025-04-13 19:39:52,463 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:39:52,465 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-04-13 19:39:52,465 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2025-04-13 19:39:52,465 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-04-13 19:39:52,465 INFO L422 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1] [2025-04-13 19:39:52,469 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:39:52,469 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:39:52,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:39:52 BasicIcfg [2025-04-13 19:39:52,472 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:39:52,472 INFO L158 Benchmark]: Toolchain (without parser) took 25912.85ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 106.1MB in the beginning and 201.3MB in the end (delta: -95.2MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2025-04-13 19:39:52,472 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:39:52,472 INFO L158 Benchmark]: CACSL2BoogieTranslator took 485.00ms. Allocated memory is still 155.2MB. Free memory was 106.1MB in the beginning and 66.1MB in the end (delta: 39.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2025-04-13 19:39:52,473 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.01ms. Allocated memory is still 155.2MB. Free memory was 66.1MB in the beginning and 63.7MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:39:52,473 INFO L158 Benchmark]: Boogie Preprocessor took 47.08ms. Allocated memory is still 155.2MB. Free memory was 63.7MB in the beginning and 61.9MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 19:39:52,473 INFO L158 Benchmark]: RCFGBuilder took 352.14ms. Allocated memory is still 155.2MB. Free memory was 61.9MB in the beginning and 31.7MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2025-04-13 19:39:52,473 INFO L158 Benchmark]: TraceAbstraction took 24992.07ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 30.8MB in the beginning and 201.3MB in the end (delta: -170.5MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2025-04-13 19:39:52,474 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 485.00ms. Allocated memory is still 155.2MB. Free memory was 106.1MB in the beginning and 66.1MB in the end (delta: 39.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.01ms. Allocated memory is still 155.2MB. Free memory was 66.1MB in the beginning and 63.7MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 47.08ms. Allocated memory is still 155.2MB. Free memory was 63.7MB in the beginning and 61.9MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 352.14ms. Allocated memory is still 155.2MB. Free memory was 61.9MB in the beginning and 31.7MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * TraceAbstraction took 24992.07ms. Allocated memory was 155.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 30.8MB in the beginning and 201.3MB in the end (delta: -170.5MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 3 procedures, 24 locations, 29 edges, 2 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: 24.9s, OverallIterations: 13, TraceHistogramMax: 21, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1358 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1358 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21320 IncrementalHoareTripleChecker+Invalid, 21375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 0 mSDtfsCounter, 21320 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1383 GetRequests, 1203 SyntacticMatches, 14 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1360occurred in iteration=12, InterpolantAutomatonStates: 192, 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: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 1628 NumberOfCodeBlocks, 1612 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 2219 ConstructedInterpolants, 0 QuantifiedInterpolants, 5357 SizeOfPredicates, 20 NumberOfNonLiveVariables, 3403 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 6835/13891 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 19:39:52,485 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...