/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/fib_unsafe-7.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:11:09,098 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:11:09,146 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 19:11:09,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:11:09,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:11:09,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:11:09,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:11:09,179 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:11:09,180 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:11:09,180 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:11:09,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:11:09,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:11:09,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:11:09,181 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:11:09,182 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:11:09,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:09,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:09,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:11:09,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:11:09,183 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 19:11:09,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:11:09,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:11:09,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:11:09,470 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:11:09,471 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:11:09,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-04-13 19:11:10,784 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d0dda2c0/515e099b00ff480f9f201c7969424956/FLAG22cb9ca28 [2025-04-13 19:11:11,061 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:11:11,062 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-04-13 19:11:11,074 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d0dda2c0/515e099b00ff480f9f201c7969424956/FLAG22cb9ca28 [2025-04-13 19:11:11,836 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d0dda2c0/515e099b00ff480f9f201c7969424956 [2025-04-13 19:11:11,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:11:11,838 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:11:11,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:11,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:11:11,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:11:11,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:11" (1/1) ... [2025-04-13 19:11:11,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aaaf9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:11, skipping insertion in model container [2025-04-13 19:11:11,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:11" (1/1) ... [2025-04-13 19:11:11,869 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:11:12,091 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/fib_unsafe-7.i[30243,30256] [2025-04-13 19:11:12,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:12,129 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:11:12,188 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/fib_unsafe-7.i[30243,30256] [2025-04-13 19:11:12,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:12,225 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:11:12,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12 WrapperNode [2025-04-13 19:11:12,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:12,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:12,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:11:12,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:11:12,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,260 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 19:11:12,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:12,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:11:12,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:11:12,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:11:12,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,280 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-13 19:11:12,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,283 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:11:12,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:11:12,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:11:12,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:11:12,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (1/1) ... [2025-04-13 19:11:12,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:12,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:12,314 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 19:11:12,316 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 19:11:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:11:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:11:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:11:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:11:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:11:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:11:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:11:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:11:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:11:12,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:11:12,333 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 19:11:12,433 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:11:12,434 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:11:12,575 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:11:12,576 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:11:12,576 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:11:12,681 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:12,688 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:12,694 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:11:12,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:12 BoogieIcfgContainer [2025-04-13 19:11:12,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:11:12,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:11:12,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:11:12,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:11:12,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:11:11" (1/3) ... [2025-04-13 19:11:12,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6355eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:12, skipping insertion in model container [2025-04-13 19:11:12,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:12" (2/3) ... [2025-04-13 19:11:12,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6355eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:12, skipping insertion in model container [2025-04-13 19:11:12,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:12" (3/3) ... [2025-04-13 19:11:12,700 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2025-04-13 19:11:12,710 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:11:12,711 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-7.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 19:11:12,711 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:11:12,741 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:11:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:12,788 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 19:11:12,792 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:12,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-04-13 19:11:12,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:12,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 19:11:12,808 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:11:12,817 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;@211e70bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:11:12,817 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:11:12,823 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:11:12,823 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 19:11:12,823 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:12,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:12,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:12,823 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:12,827 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1561770242, now seen corresponding path program 1 times [2025-04-13 19:11:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:12,833 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4904999] [2025-04-13 19:11:12,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:12,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 19:11:12,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:11:12,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:12,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:13,046 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 19:11:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:13,046 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4904999] [2025-04-13 19:11:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4904999] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:13,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:11:13,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484356589] [2025-04-13 19:11:13,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:13,054 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:11:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:13,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:11:13,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:11:13,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:13,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 19:11:13,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:13,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:13,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:13,184 INFO L116 PetriNetUnfolderBase]: 115/193 cut-off events. [2025-04-13 19:11:13,185 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 193 events. 115/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 564 event pairs, 20 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 368. Up to 118 conditions per place. [2025-04-13 19:11:13,188 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 20 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2025-04-13 19:11:13,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:13,189 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:11:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:11:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-13 19:11:13,197 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2025-04-13 19:11:13,198 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2025-04-13 19:11:13,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:13,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:11:13,204 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:13,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 19:11:13,210 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 19:11:13,210 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:13,210 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 19:11:13,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:13,210 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:13,210 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:11:13,210 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:13,211 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211856, now seen corresponding path program 1 times [2025-04-13 19:11:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:13,211 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082214921] [2025-04-13 19:11:13,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:13,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:13,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:13,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:13,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:13,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082214921] [2025-04-13 19:11:13,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082214921] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:13,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482259099] [2025-04-13 19:11:13,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:13,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:13,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:13,305 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 19:11:13,306 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 19:11:13,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:13,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:13,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:13,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:13,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:11:13,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:13,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:13,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482259099] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:13,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:13,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:11:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910000410] [2025-04-13 19:11:13,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:13,417 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:11:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:13,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:11:13,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:11:13,417 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:13,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 19:11:13,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:13,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:13,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:13,529 INFO L116 PetriNetUnfolderBase]: 151/247 cut-off events. [2025-04-13 19:11:13,529 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:13,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 247 events. 151/247 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 20 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 539. Up to 91 conditions per place. [2025-04-13 19:11:13,533 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2025-04-13 19:11:13,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:13,534 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:11:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:11:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-04-13 19:11:13,536 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-04-13 19:11:13,536 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 88 transitions. [2025-04-13 19:11:13,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:13,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:13,539 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:13,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-04-13 19:11:13,539 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 19:11:13,539 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:13,539 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 19:11:13,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:13,540 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:13,546 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 19:11:13,740 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:13,740 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:13,741 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash 493351806, now seen corresponding path program 2 times [2025-04-13 19:11:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:13,741 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388777319] [2025-04-13 19:11:13,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:13,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:13,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:13,766 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:13,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:13,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:13,873 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388777319] [2025-04-13 19:11:13,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388777319] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:13,873 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197482930] [2025-04-13 19:11:13,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:13,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:13,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:13,875 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 19:11:13,877 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 19:11:13,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:13,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:13,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:13,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:13,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:11:13,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:13,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:14,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197482930] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:14,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:14,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:11:14,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275134046] [2025-04-13 19:11:14,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:14,016 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:11:14,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:14,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:11:14,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:11:14,017 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:14,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 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 19:11:14,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:14,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:14,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:14,168 INFO L116 PetriNetUnfolderBase]: 259/409 cut-off events. [2025-04-13 19:11:14,168 INFO L117 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-04-13 19:11:14,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 409 events. 259/409 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1224 event pairs, 20 based on Foata normal form. 54/373 useless extension candidates. Maximal degree in co-relation 1061. Up to 109 conditions per place. [2025-04-13 19:11:14,172 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 74 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2025-04-13 19:11:14,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:14,173 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:11:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:11:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-04-13 19:11:14,174 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-04-13 19:11:14,174 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 175 transitions. [2025-04-13 19:11:14,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:14,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 90 transitions, 402 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:14,178 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:14,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2025-04-13 19:11:14,179 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 19:11:14,179 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:14,179 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 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 19:11:14,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:14,179 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:14,185 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 19:11:14,380 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,SelfDestructingSolverStorable2 [2025-04-13 19:11:14,380 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:14,380 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1439646146, now seen corresponding path program 3 times [2025-04-13 19:11:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:14,381 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677492559] [2025-04-13 19:11:14,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:14,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:14,419 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:14,419 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:14,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:14,555 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677492559] [2025-04-13 19:11:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677492559] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:14,555 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520738441] [2025-04-13 19:11:14,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:14,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:14,558 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 19:11:14,560 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 19:11:14,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:14,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:14,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:14,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:14,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 19:11:14,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:14,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520738441] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:14,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-04-13 19:11:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748414198] [2025-04-13 19:11:14,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:14,757 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 19:11:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:14,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 19:11:14,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-04-13 19:11:14,758 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:14,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 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 19:11:14,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:14,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:14,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:14,966 INFO L116 PetriNetUnfolderBase]: 367/571 cut-off events. [2025-04-13 19:11:14,966 INFO L117 PetriNetUnfolderBase]: For 2250/2250 co-relation queries the response was YES. [2025-04-13 19:11:14,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 571 events. 367/571 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1738 event pairs, 20 based on Foata normal form. 54/499 useless extension candidates. Maximal degree in co-relation 1700. Up to 136 conditions per place. [2025-04-13 19:11:14,970 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 110 selfloop transitions, 17 changer transitions 0/132 dead transitions. [2025-04-13 19:11:14,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 132 transitions, 654 flow [2025-04-13 19:11:14,970 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 19:11:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-13 19:11:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 259 transitions. [2025-04-13 19:11:14,972 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2025-04-13 19:11:14,973 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 18 states and 259 transitions. [2025-04-13 19:11:14,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 132 transitions, 654 flow [2025-04-13 19:11:14,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 132 transitions, 594 flow, removed 25 selfloop flow, removed 5 redundant places. [2025-04-13 19:11:14,981 INFO L231 Difference]: Finished difference. Result has 66 places, 36 transitions, 208 flow [2025-04-13 19:11:14,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=36} [2025-04-13 19:11:14,982 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2025-04-13 19:11:14,982 INFO L485 AbstractCegarLoop]: Abstraction has has 66 places, 36 transitions, 208 flow [2025-04-13 19:11:14,982 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 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 19:11:14,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:14,983 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:14,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 19:11:15,187 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:15,187 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:15,187 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -664372994, now seen corresponding path program 4 times [2025-04-13 19:11:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:15,188 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898210567] [2025-04-13 19:11:15,188 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:15,196 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:11:15,211 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:15,211 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:15,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:16,149 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898210567] [2025-04-13 19:11:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898210567] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:16,149 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577791193] [2025-04-13 19:11:16,149 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:16,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:16,152 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 19:11:16,153 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 19:11:16,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:11:16,215 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:16,215 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:16,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:16,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-04-13 19:11:16,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:17,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577791193] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:18,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 19:11:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704459985] [2025-04-13 19:11:18,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:18,077 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 19:11:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:18,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 19:11:18,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3469, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 19:11:18,108 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:18,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 36 transitions, 208 flow. Second operand has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 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 19:11:18,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:18,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:18,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:12:19,464 INFO L116 PetriNetUnfolderBase]: 48708/73900 cut-off events. [2025-04-13 19:12:19,464 INFO L117 PetriNetUnfolderBase]: For 373041/373041 co-relation queries the response was YES. [2025-04-13 19:12:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238942 conditions, 73900 events. 48708/73900 cut-off events. For 373041/373041 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 504863 event pairs, 2667 based on Foata normal form. 1843/62743 useless extension candidates. Maximal degree in co-relation 238908. Up to 14608 conditions per place. [2025-04-13 19:12:20,029 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 2109 selfloop transitions, 2549 changer transitions 1316/5974 dead transitions. [2025-04-13 19:12:20,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 5974 transitions, 44606 flow [2025-04-13 19:12:20,030 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 562 states. [2025-04-13 19:12:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2025-04-13 19:12:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 5693 transitions. [2025-04-13 19:12:20,051 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40519572953736654 [2025-04-13 19:12:20,052 INFO L175 Difference]: Start difference. First operand has 66 places, 36 transitions, 208 flow. Second operand 562 states and 5693 transitions. [2025-04-13 19:12:20,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 5974 transitions, 44606 flow [2025-04-13 19:12:20,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 5974 transitions, 36178 flow, removed 3666 selfloop flow, removed 11 redundant places. [2025-04-13 19:12:20,571 INFO L231 Difference]: Finished difference. Result has 895 places, 2649 transitions, 16842 flow [2025-04-13 19:12:20,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=562, PETRI_FLOW=16842, PETRI_PLACES=895, PETRI_TRANSITIONS=2649} [2025-04-13 19:12:20,572 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 870 predicate places. [2025-04-13 19:12:20,572 INFO L485 AbstractCegarLoop]: Abstraction has has 895 places, 2649 transitions, 16842 flow [2025-04-13 19:12:20,573 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 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 19:12:20,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:12:20,573 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:12:20,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 19:12:20,774 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:12:20,774 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:12:20,775 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:12:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash 951067432, now seen corresponding path program 1 times [2025-04-13 19:12:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:12:20,775 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63249008] [2025-04-13 19:12:20,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:12:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:12:20,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 19:12:20,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 19:12:20,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:12:20,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:12:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:12:21,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:12:21,480 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63249008] [2025-04-13 19:12:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63249008] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:12:21,480 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724716948] [2025-04-13 19:12:21,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:12:21,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:12:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:12:21,482 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 19:12:21,483 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 19:12:21,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 19:12:21,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 19:12:21,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:12:21,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:12:21,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 19:12:21,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:12:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:12:22,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:12:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:12:23,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724716948] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:12:23,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:12:23,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 68 [2025-04-13 19:12:23,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629773525] [2025-04-13 19:12:23,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:12:23,013 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-04-13 19:12:23,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:12:23,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-04-13 19:12:23,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=4179, Unknown=0, NotChecked=0, Total=4830 [2025-04-13 19:12:23,067 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:12:23,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 2649 transitions, 16842 flow. Second operand has 70 states, 70 states have (on average 3.3285714285714287) internal successors, (233), 70 states have internal predecessors, (233), 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 19:12:23,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:12:23,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:12:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand