./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:27:54,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:27:54,264 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:27:54,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:27:54,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:27:54,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:27:54,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:27:54,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:27:54,307 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:27:54,309 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:27:54,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:27:54,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:27:54,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:27:54,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:27:54,312 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:27:54,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:27:54,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:27:54,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:27:54,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:27:54,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:27:54,314 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:27:54,314 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:27:54,315 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:27:54,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:27:54,315 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:27:54,315 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:27:54,316 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:27:54,316 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:27:54,316 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:27:54,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:27:54,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:27:54,317 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:27:54,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:27:54,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:54,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:27:54,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:27:54,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:27:54,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:27:54,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:27:54,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:27:54,320 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:27:54,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:27:54,321 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2024-10-11 19:27:54,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:27:54,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:27:54,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:27:54,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:27:54,642 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:27:54,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-10-11 19:27:56,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:27:56,385 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:27:56,386 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2024-10-11 19:27:56,406 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/61d74b084/b8cc050a48d4485e8aa2a01f0a6558f2/FLAG49f8c7218 [2024-10-11 19:27:56,419 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/61d74b084/b8cc050a48d4485e8aa2a01f0a6558f2 [2024-10-11 19:27:56,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:27:56,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:27:56,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:56,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:27:56,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:27:56,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:56,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1a6ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56, skipping insertion in model container [2024-10-11 19:27:56,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:56,480 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:27:56,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:56,851 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:27:56,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:56,946 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:27:56,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56 WrapperNode [2024-10-11 19:27:56,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:56,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:56,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:27:56,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:27:56,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:56,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:56,994 INFO L138 Inliner]: procedures = 168, calls = 12, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 44 [2024-10-11 19:27:56,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:56,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:27:56,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:27:56,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:27:57,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,019 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]. [2024-10-11 19:27:57,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,034 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:27:57,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:27:57,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:27:57,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:27:57,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (1/1) ... [2024-10-11 19:27:57,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:57,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:27:57,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:27:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 19:27:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 19:27:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:27:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:27:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:27:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:27:57,125 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:27:57,223 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:27:57,225 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:27:57,354 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:27:57,354 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:27:57,425 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:27:57,425 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 19:27:57,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:57 BoogieIcfgContainer [2024-10-11 19:27:57,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:27:57,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:27:57,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:27:57,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:27:57,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:27:56" (1/3) ... [2024-10-11 19:27:57,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32304778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:57, skipping insertion in model container [2024-10-11 19:27:57,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:56" (2/3) ... [2024-10-11 19:27:57,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32304778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:57, skipping insertion in model container [2024-10-11 19:27:57,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:57" (3/3) ... [2024-10-11 19:27:57,438 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-10-11 19:27:57,456 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:27:57,456 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-11 19:27:57,456 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:27:57,487 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 19 transitions, 42 flow [2024-10-11 19:27:57,568 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-10-11 19:27:57,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:57,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 2/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2024-10-11 19:27:57,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 19 transitions, 42 flow [2024-10-11 19:27:57,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 19 transitions, 42 flow [2024-10-11 19:27:57,582 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:57,590 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:57,591 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 19:27:57,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:57,597 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:57,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:57,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:57,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:57,599 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:27:57,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash 169856, now seen corresponding path program 1 times [2024-10-11 19:27:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:57,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685791578] [2024-10-11 19:27:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:57,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685791578] [2024-10-11 19:27:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685791578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834842097] [2024-10-11 19:27:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:57,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:57,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 19 [2024-10-11 19:27:57,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-10-11 19:27:57,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:57,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 19 [2024-10-11 19:27:57,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:57,868 INFO L124 PetriNetUnfolderBase]: 5/28 cut-off events. [2024-10-11 19:27:57,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 28 events. 5/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 5 based on Foata normal form. 4/31 useless extension candidates. Maximal degree in co-relation 39. Up to 20 conditions per place. [2024-10-11 19:27:57,870 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 8 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2024-10-11 19:27:57,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 13 transitions, 46 flow [2024-10-11 19:27:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:27:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:27:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 23 transitions. [2024-10-11 19:27:57,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-10-11 19:27:57,882 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 42 flow. Second operand 2 states and 23 transitions. [2024-10-11 19:27:57,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 13 transitions, 46 flow [2024-10-11 19:27:57,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:57,885 INFO L231 Difference]: Finished difference. Result has 17 places, 13 transitions, 30 flow [2024-10-11 19:27:57,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=30, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2024-10-11 19:27:57,890 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, -3 predicate places. [2024-10-11 19:27:57,890 INFO L471 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 30 flow [2024-10-11 19:27:57,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-10-11 19:27:57,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:57,890 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:27:57,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:27:57,891 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:27:57,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 163234255, now seen corresponding path program 1 times [2024-10-11 19:27:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118623922] [2024-10-11 19:27:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:57,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:57,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:57,941 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:57,943 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 19:27:57,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2024-10-11 19:27:57,944 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2024-10-11 19:27:57,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 4 remaining) [2024-10-11 19:27:57,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:27:57,945 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 19:27:57,948 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:57,948 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:27:57,970 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:57,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 32 transitions, 74 flow [2024-10-11 19:27:57,983 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-11 19:27:57,983 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:27:57,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 3 conditions per place. [2024-10-11 19:27:57,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 32 transitions, 74 flow [2024-10-11 19:27:57,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 32 transitions, 74 flow [2024-10-11 19:27:57,989 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:57,990 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:57,990 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 19:27:57,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:57,996 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:57,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:57,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:57,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:57,997 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 19:27:57,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash 201632, now seen corresponding path program 1 times [2024-10-11 19:27:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:57,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173420053] [2024-10-11 19:27:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173420053] [2024-10-11 19:27:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173420053] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:58,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:58,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:58,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150203669] [2024-10-11 19:27:58,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:58,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:58,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:58,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-10-11 19:27:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2024-10-11 19:27:58,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:58,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-10-11 19:27:58,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:58,133 INFO L124 PetriNetUnfolderBase]: 95/236 cut-off events. [2024-10-11 19:27:58,133 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-11 19:27:58,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 236 events. 95/236 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1103 event pairs, 95 based on Foata normal form. 48/281 useless extension candidates. Maximal degree in co-relation 293. Up to 182 conditions per place. [2024-10-11 19:27:58,136 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 14 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-10-11 19:27:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 84 flow [2024-10-11 19:27:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:27:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:27:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-10-11 19:27:58,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-10-11 19:27:58,138 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 74 flow. Second operand 2 states and 39 transitions. [2024-10-11 19:27:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 84 flow [2024-10-11 19:27:58,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:58,140 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2024-10-11 19:27:58,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-10-11 19:27:58,143 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-10-11 19:27:58,143 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2024-10-11 19:27:58,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2024-10-11 19:27:58,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:58,144 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-10-11 19:27:58,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:27:58,144 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 19:27:58,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1542413990, now seen corresponding path program 1 times [2024-10-11 19:27:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597790563] [2024-10-11 19:27:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:58,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:58,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:58,175 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:58,175 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 19:27:58,175 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2024-10-11 19:27:58,176 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2024-10-11 19:27:58,176 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2024-10-11 19:27:58,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2024-10-11 19:27:58,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:27:58,179 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 19:27:58,180 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:58,180 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:27:58,204 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:58,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 45 transitions, 108 flow [2024-10-11 19:27:58,224 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-10-11 19:27:58,226 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:27:58,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 169 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2024-10-11 19:27:58,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 45 transitions, 108 flow [2024-10-11 19:27:58,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 108 flow [2024-10-11 19:27:58,230 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:58,234 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:58,236 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 19:27:58,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:58,238 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:58,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:58,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:58,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:58,239 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 19:27:58,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash 246317, now seen corresponding path program 1 times [2024-10-11 19:27:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:58,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723961296] [2024-10-11 19:27:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723961296] [2024-10-11 19:27:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723961296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311219416] [2024-10-11 19:27:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:58,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:58,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:27:58,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 108 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:58,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:27:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:58,545 INFO L124 PetriNetUnfolderBase]: 995/1844 cut-off events. [2024-10-11 19:27:58,546 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-10-11 19:27:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1844 events. 995/1844 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11441 event pairs, 995 based on Foata normal form. 450/2279 useless extension candidates. Maximal degree in co-relation 834. Up to 1514 conditions per place. [2024-10-11 19:27:58,567 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 20 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2024-10-11 19:27:58,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 124 flow [2024-10-11 19:27:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:27:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:27:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 55 transitions. [2024-10-11 19:27:58,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-11 19:27:58,569 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 108 flow. Second operand 2 states and 55 transitions. [2024-10-11 19:27:58,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 124 flow [2024-10-11 19:27:58,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 122 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:58,573 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 82 flow [2024-10-11 19:27:58,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-10-11 19:27:58,574 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2024-10-11 19:27:58,576 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 82 flow [2024-10-11 19:27:58,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:58,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:58,577 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-10-11 19:27:58,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:27:58,577 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 19:27:58,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2022398429, now seen corresponding path program 1 times [2024-10-11 19:27:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697740119] [2024-10-11 19:27:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:58,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:58,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:58,633 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 6 remaining) [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2024-10-11 19:27:58,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2024-10-11 19:27:58,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:27:58,635 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 19:27:58,635 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:58,636 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 19:27:58,662 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:58,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 58 transitions, 144 flow [2024-10-11 19:27:58,673 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2024-10-11 19:27:58,674 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 19:27:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 74 events. 8/74 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 233 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 68. Up to 5 conditions per place. [2024-10-11 19:27:58,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 58 transitions, 144 flow [2024-10-11 19:27:58,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 58 transitions, 144 flow [2024-10-11 19:27:58,677 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:58,679 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:58,680 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 19:27:58,681 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:58,681 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:58,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:58,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:58,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:58,681 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 19:27:58,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 303911, now seen corresponding path program 1 times [2024-10-11 19:27:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:58,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590808] [2024-10-11 19:27:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590808] [2024-10-11 19:27:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590808] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:58,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:58,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467216275] [2024-10-11 19:27:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:58,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:58,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-10-11 19:27:58,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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) [2024-10-11 19:27:58,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:58,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-10-11 19:27:58,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:59,979 INFO L124 PetriNetUnfolderBase]: 8555/13620 cut-off events. [2024-10-11 19:27:59,979 INFO L125 PetriNetUnfolderBase]: For 2794/2794 co-relation queries the response was YES. [2024-10-11 19:28:00,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26535 conditions, 13620 events. 8555/13620 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 97376 event pairs, 8555 based on Foata normal form. 3722/17259 useless extension candidates. Maximal degree in co-relation 3562. Up to 11666 conditions per place. [2024-10-11 19:28:00,195 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 26 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2024-10-11 19:28:00,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 166 flow [2024-10-11 19:28:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:28:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:28:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2024-10-11 19:28:00,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6120689655172413 [2024-10-11 19:28:00,200 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 144 flow. Second operand 2 states and 71 transitions. [2024-10-11 19:28:00,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 166 flow [2024-10-11 19:28:00,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 160 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 19:28:00,208 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 108 flow [2024-10-11 19:28:00,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-10-11 19:28:00,209 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2024-10-11 19:28:00,209 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 108 flow [2024-10-11 19:28:00,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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) [2024-10-11 19:28:00,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:00,211 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:00,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:28:00,211 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 19:28:00,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1241048209, now seen corresponding path program 1 times [2024-10-11 19:28:00,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:00,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134317631] [2024-10-11 19:28:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:00,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134317631] [2024-10-11 19:28:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134317631] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:00,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:00,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:28:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921899241] [2024-10-11 19:28:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:00,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:28:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:28:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:28:00,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-10-11 19:28:00,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-10-11 19:28:00,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:00,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-10-11 19:28:00,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:00,842 INFO L124 PetriNetUnfolderBase]: 4064/6083 cut-off events. [2024-10-11 19:28:00,842 INFO L125 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2024-10-11 19:28:00,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12183 conditions, 6083 events. 4064/6083 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35276 event pairs, 4064 based on Foata normal form. 1172/7194 useless extension candidates. Maximal degree in co-relation 12176. Up to 5626 conditions per place. [2024-10-11 19:28:00,874 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-10-11 19:28:00,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 31 transitions, 128 flow [2024-10-11 19:28:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:28:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:28:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-10-11 19:28:00,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2024-10-11 19:28:00,876 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 108 flow. Second operand 3 states and 80 transitions. [2024-10-11 19:28:00,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 31 transitions, 128 flow [2024-10-11 19:28:00,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:28:00,879 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 86 flow [2024-10-11 19:28:00,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-10-11 19:28:00,881 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -16 predicate places. [2024-10-11 19:28:00,881 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 86 flow [2024-10-11 19:28:00,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-10-11 19:28:00,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:00,881 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:00,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:28:00,882 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-11 19:28:00,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2097833434, now seen corresponding path program 1 times [2024-10-11 19:28:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974912530] [2024-10-11 19:28:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:00,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:28:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:00,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:28:00,912 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-11 19:28:00,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-11 19:28:00,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:28:00,914 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-11 19:28:00,914 WARN L239 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:28:00,914 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-10-11 19:28:00,942 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:28:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 182 flow [2024-10-11 19:28:00,953 INFO L124 PetriNetUnfolderBase]: 10/91 cut-off events. [2024-10-11 19:28:00,953 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-11 19:28:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 91 events. 10/91 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2024-10-11 19:28:00,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 71 transitions, 182 flow [2024-10-11 19:28:00,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 182 flow [2024-10-11 19:28:00,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:28:00,959 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:28:00,959 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-11 19:28:00,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:28:00,960 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:28:00,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:28:00,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:00,960 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:28:00,960 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-11 19:28:00,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash 374414, now seen corresponding path program 1 times [2024-10-11 19:28:00,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:00,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886312587] [2024-10-11 19:28:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:00,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:00,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886312587] [2024-10-11 19:28:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886312587] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:28:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883235234] [2024-10-11 19:28:00,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:00,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:28:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:28:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:28:00,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-10-11 19:28:00,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-10-11 19:28:00,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:00,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-10-11 19:28:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:08,045 INFO L124 PetriNetUnfolderBase]: 66875/97252 cut-off events. [2024-10-11 19:28:08,046 INFO L125 PetriNetUnfolderBase]: For 26154/26154 co-relation queries the response was YES. [2024-10-11 19:28:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191816 conditions, 97252 events. 66875/97252 cut-off events. For 26154/26154 co-relation queries the response was YES. Maximal size of possible extension queue 3825. Compared 756429 event pairs, 66875 based on Foata normal form. 28538/125299 useless extension candidates. Maximal degree in co-relation 26786. Up to 85538 conditions per place. [2024-10-11 19:28:08,750 INFO L140 encePairwiseOnDemand]: 60/71 looper letters, 32 selfloop transitions, 0 changer transitions 0/53 dead transitions. [2024-10-11 19:28:08,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 210 flow [2024-10-11 19:28:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:28:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:28:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 87 transitions. [2024-10-11 19:28:08,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6126760563380281 [2024-10-11 19:28:08,752 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 182 flow. Second operand 2 states and 87 transitions. [2024-10-11 19:28:08,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 210 flow [2024-10-11 19:28:08,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 198 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-11 19:28:08,770 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 134 flow [2024-10-11 19:28:08,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-10-11 19:28:08,771 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2024-10-11 19:28:08,771 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 134 flow [2024-10-11 19:28:08,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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) [2024-10-11 19:28:08,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:08,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:08,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:28:08,772 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-11 19:28:08,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash 857971394, now seen corresponding path program 1 times [2024-10-11 19:28:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:08,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109591335] [2024-10-11 19:28:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109591335] [2024-10-11 19:28:08,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109591335] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:08,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:08,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:28:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170099086] [2024-10-11 19:28:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:08,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:28:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:28:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:28:08,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-10-11 19:28:08,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-11 19:28:08,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-10-11 19:28:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:28:11,273 INFO L124 PetriNetUnfolderBase]: 26564/36649 cut-off events. [2024-10-11 19:28:11,273 INFO L125 PetriNetUnfolderBase]: For 5368/5368 co-relation queries the response was YES. [2024-10-11 19:28:11,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73375 conditions, 36649 events. 26564/36649 cut-off events. For 5368/5368 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 230273 event pairs, 26564 based on Foata normal form. 7422/43770 useless extension candidates. Maximal degree in co-relation 73367. Up to 34376 conditions per place. [2024-10-11 19:28:11,473 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-10-11 19:28:11,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 158 flow [2024-10-11 19:28:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:28:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:28:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-10-11 19:28:11,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.460093896713615 [2024-10-11 19:28:11,475 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 134 flow. Second operand 3 states and 98 transitions. [2024-10-11 19:28:11,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 158 flow [2024-10-11 19:28:11,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:28:11,487 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 106 flow [2024-10-11 19:28:11,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2024-10-11 19:28:11,488 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -20 predicate places. [2024-10-11 19:28:11,488 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 106 flow [2024-10-11 19:28:11,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-11 19:28:11,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:11,489 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:28:11,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 19:28:11,489 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-11 19:28:11,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1899740303, now seen corresponding path program 1 times [2024-10-11 19:28:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:11,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614836155] [2024-10-11 19:28:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:11,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:28:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:28:11,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:28:11,534 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:28:11,534 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2024-10-11 19:28:11,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2024-10-11 19:28:11,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-10-11 19:28:11,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:28:11,536 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-11 19:28:11,537 WARN L239 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:28:11,537 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-10-11 19:28:11,567 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:28:11,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 222 flow [2024-10-11 19:28:11,577 INFO L124 PetriNetUnfolderBase]: 12/108 cut-off events. [2024-10-11 19:28:11,577 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-11 19:28:11,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 108 events. 12/108 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 379 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 115. Up to 7 conditions per place. [2024-10-11 19:28:11,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 222 flow [2024-10-11 19:28:11,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 84 transitions, 222 flow [2024-10-11 19:28:11,580 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:28:11,581 INFO L333 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=None, 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;@63e06e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:28:11,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-11 19:28:11,581 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:28:11,581 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:28:11,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:28:11,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:28:11,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:28:11,582 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-10-11 19:28:11,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:28:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 457826, now seen corresponding path program 1 times [2024-10-11 19:28:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:28:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137333807] [2024-10-11 19:28:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:28:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:28:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:28:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:28:11,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:28:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137333807] [2024-10-11 19:28:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137333807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:28:11,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:28:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:28:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885493006] [2024-10-11 19:28:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:28:11,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:28:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:28:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:28:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:28:11,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-10-11 19:28:11,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2024-10-11 19:28:11,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:28:11,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-10-11 19:28:11,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand