./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/02_inc_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:09:37,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:09:38,018 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:09:38,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:09:38,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:09:38,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:09:38,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:09:38,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:09:38,060 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:09:38,061 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:09:38,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:09:38,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:09:38,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:09:38,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:09:38,064 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:09:38,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:09:38,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:09:38,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:09:38,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:09:38,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:09:38,066 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:09:38,070 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:09:38,071 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:09:38,071 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:09:38,071 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:09:38,071 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:09:38,072 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:09:38,072 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:09:38,072 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:09:38,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:09:38,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:09:38,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:09:38,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:09:38,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:09:38,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:09:38,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:09:38,076 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:09:38,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:09:38,076 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:09:38,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:09:38,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:09:38,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:09:38,077 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 [2024-10-13 12:09:38,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:09:38,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:09:38,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:09:38,422 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:09:38,423 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:09:38,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2024-10-13 12:09:40,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:09:40,756 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:09:40,756 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2024-10-13 12:09:40,782 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2202c35/3eec316f2cde4aa99a4e3f2ed5dc8adb/FLAG30f6d9506 [2024-10-13 12:09:40,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2202c35/3eec316f2cde4aa99a4e3f2ed5dc8adb [2024-10-13 12:09:40,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:09:40,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:09:40,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:09:40,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:09:40,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:09:40,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:09:40" (1/1) ... [2024-10-13 12:09:40,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182af3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:40, skipping insertion in model container [2024-10-13 12:09:40,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:09:40" (1/1) ... [2024-10-13 12:09:40,874 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:09:41,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:09:41,295 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:09:41,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:09:41,395 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:09:41,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41 WrapperNode [2024-10-13 12:09:41,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:09:41,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:09:41,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:09:41,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:09:41,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,450 INFO L138 Inliner]: procedures = 170, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-10-13 12:09:41,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:09:41,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:09:41,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:09:41,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:09:41,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,498 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 3 writes are split as follows [0, 1, 2]. [2024-10-13 12:09:41,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:09:41,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:09:41,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:09:41,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:09:41,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (1/1) ... [2024-10-13 12:09:41,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:09:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:09:41,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 12:09:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 12:09:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:09:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:09:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:09:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 12:09:41,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 12:09:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:09:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:09:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:09:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 12:09:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 12:09:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:09:41,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:09:41,652 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:09:41,877 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:09:41,880 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:09:42,085 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:09:42,086 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:09:42,302 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:09:42,302 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 12:09:42,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:09:42 BoogieIcfgContainer [2024-10-13 12:09:42,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:09:42,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:09:42,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:09:42,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:09:42,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:09:40" (1/3) ... [2024-10-13 12:09:42,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ed44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:09:42, skipping insertion in model container [2024-10-13 12:09:42,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:09:41" (2/3) ... [2024-10-13 12:09:42,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ed44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:09:42, skipping insertion in model container [2024-10-13 12:09:42,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:09:42" (3/3) ... [2024-10-13 12:09:42,313 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2024-10-13 12:09:42,330 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:09:42,331 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-13 12:09:42,331 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:09:42,385 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:09:42,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 74 flow [2024-10-13 12:09:42,453 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2024-10-13 12:09:42,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:42,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 39 events. 3/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 134 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-10-13 12:09:42,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 74 flow [2024-10-13 12:09:42,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 74 flow [2024-10-13 12:09:42,474 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:09:42,482 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;@482dee2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:09:42,483 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-10-13 12:09:42,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:09:42,487 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:09:42,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:42,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:42,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:09:42,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 12:09:42,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 282694, now seen corresponding path program 1 times [2024-10-13 12:09:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094181823] [2024-10-13 12:09:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:42,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094181823] [2024-10-13 12:09:42,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094181823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:42,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:42,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498903368] [2024-10-13 12:09:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:42,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:09:42,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:09:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:09:42,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-13 12:09:42,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 74 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) [2024-10-13 12:09:42,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:42,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-13 12:09:42,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:42,945 INFO L124 PetriNetUnfolderBase]: 42/114 cut-off events. [2024-10-13 12:09:42,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:42,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 114 events. 42/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 404 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 208. Up to 102 conditions per place. [2024-10-13 12:09:42,948 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 24 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-10-13 12:09:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 110 flow [2024-10-13 12:09:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:09:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:09:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 40 transitions. [2024-10-13 12:09:42,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:09:42,965 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 74 flow. Second operand 2 states and 40 transitions. [2024-10-13 12:09:42,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 110 flow [2024-10-13 12:09:42,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:09:42,971 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 62 flow [2024-10-13 12:09:42,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-13 12:09:42,977 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-13 12:09:42,978 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 62 flow [2024-10-13 12:09:42,980 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) [2024-10-13 12:09:42,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:42,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:09:42,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:09:42,982 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 12:09:42,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 271677128, now seen corresponding path program 1 times [2024-10-13 12:09:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490412609] [2024-10-13 12:09:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:43,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490412609] [2024-10-13 12:09:43,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490412609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:43,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:43,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369982407] [2024-10-13 12:09:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:43,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:09:43,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:09:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:09:43,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-13 12:09:43,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:09:43,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:43,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-13 12:09:43,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:43,330 INFO L124 PetriNetUnfolderBase]: 36/99 cut-off events. [2024-10-13 12:09:43,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:43,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 99 events. 36/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 343 event pairs, 28 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 187. Up to 78 conditions per place. [2024-10-13 12:09:43,332 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-10-13 12:09:43,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 106 flow [2024-10-13 12:09:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:09:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:09:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-10-13 12:09:43,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-10-13 12:09:43,334 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 62 flow. Second operand 3 states and 44 transitions. [2024-10-13 12:09:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 106 flow [2024-10-13 12:09:43,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:09:43,336 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 62 flow [2024-10-13 12:09:43,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-10-13 12:09:43,337 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-10-13 12:09:43,337 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 62 flow [2024-10-13 12:09:43,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:09:43,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:43,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:09:43,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:09:43,338 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 12:09:43,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash 271677129, now seen corresponding path program 1 times [2024-10-13 12:09:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:43,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921828110] [2024-10-13 12:09:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921828110] [2024-10-13 12:09:43,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921828110] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:43,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999749090] [2024-10-13 12:09:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:43,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:09:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:09:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:09:43,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-13 12:09:43,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:09:43,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:43,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-13 12:09:43,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:43,574 INFO L124 PetriNetUnfolderBase]: 30/84 cut-off events. [2024-10-13 12:09:43,574 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:43,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 84 events. 30/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 271 event pairs, 22 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 164. Up to 63 conditions per place. [2024-10-13 12:09:43,576 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-10-13 12:09:43,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2024-10-13 12:09:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:09:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:09:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-10-13 12:09:43,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-10-13 12:09:43,579 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 62 flow. Second operand 4 states and 47 transitions. [2024-10-13 12:09:43,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2024-10-13 12:09:43,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:09:43,581 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 56 flow [2024-10-13 12:09:43,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2024-10-13 12:09:43,582 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2024-10-13 12:09:43,582 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 56 flow [2024-10-13 12:09:43,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:09:43,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:43,583 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-13 12:09:43,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:09:43,583 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 12:09:43,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -167972605, now seen corresponding path program 1 times [2024-10-13 12:09:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:43,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993182488] [2024-10-13 12:09:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:09:43,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:09:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:09:43,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:09:43,621 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:09:43,622 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-10-13 12:09:43,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-10-13 12:09:43,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-10-13 12:09:43,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-10-13 12:09:43,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-10-13 12:09:43,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (26 of 32 remaining) [2024-10-13 12:09:43,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-10-13 12:09:43,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-10-13 12:09:43,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-10-13 12:09:43,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2024-10-13 12:09:43,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2024-10-13 12:09:43,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-10-13 12:09:43,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2024-10-13 12:09:43,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2024-10-13 12:09:43,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-10-13 12:09:43,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-10-13 12:09:43,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-10-13 12:09:43,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-10-13 12:09:43,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-10-13 12:09:43,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-10-13 12:09:43,629 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-10-13 12:09:43,629 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 32 remaining) [2024-10-13 12:09:43,629 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-10-13 12:09:43,629 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-10-13 12:09:43,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-10-13 12:09:43,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2024-10-13 12:09:43,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2024-10-13 12:09:43,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-10-13 12:09:43,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2024-10-13 12:09:43,631 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2024-10-13 12:09:43,631 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-10-13 12:09:43,631 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-10-13 12:09:43,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:09:43,632 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-13 12:09:43,635 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:09:43,635 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:09:43,688 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:09:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 63 transitions, 136 flow [2024-10-13 12:09:43,709 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2024-10-13 12:09:43,710 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:09:43,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 316 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-10-13 12:09:43,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 63 transitions, 136 flow [2024-10-13 12:09:43,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 136 flow [2024-10-13 12:09:43,714 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:09:43,715 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;@482dee2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:09:43,715 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-13 12:09:43,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:09:43,717 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:09:43,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:43,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:43,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:09:43,718 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-13 12:09:43,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash 345253, now seen corresponding path program 1 times [2024-10-13 12:09:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809376493] [2024-10-13 12:09:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809376493] [2024-10-13 12:09:43,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809376493] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:43,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:43,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58764436] [2024-10-13 12:09:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:43,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:09:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:09:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:09:43,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-10-13 12:09:43,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 136 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) [2024-10-13 12:09:43,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:43,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-10-13 12:09:43,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:44,329 INFO L124 PetriNetUnfolderBase]: 1980/3340 cut-off events. [2024-10-13 12:09:44,329 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-13 12:09:44,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 3340 events. 1980/3340 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19414 event pairs, 1746 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 4917. Up to 3123 conditions per place. [2024-10-13 12:09:44,362 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 45 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-10-13 12:09:44,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 208 flow [2024-10-13 12:09:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:09:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:09:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2024-10-13 12:09:44,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:09:44,364 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 136 flow. Second operand 2 states and 72 transitions. [2024-10-13 12:09:44,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 208 flow [2024-10-13 12:09:44,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:09:44,366 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 118 flow [2024-10-13 12:09:44,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-10-13 12:09:44,368 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-10-13 12:09:44,368 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 118 flow [2024-10-13 12:09:44,368 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) [2024-10-13 12:09:44,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:44,368 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:09:44,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:09:44,369 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-13 12:09:44,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash 331825155, now seen corresponding path program 1 times [2024-10-13 12:09:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:44,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714034646] [2024-10-13 12:09:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714034646] [2024-10-13 12:09:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714034646] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852091949] [2024-10-13 12:09:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:44,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:09:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:09:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:09:44,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-10-13 12:09:44,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-10-13 12:09:44,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:44,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-10-13 12:09:44,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:44,844 INFO L124 PetriNetUnfolderBase]: 978/1742 cut-off events. [2024-10-13 12:09:44,844 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-13 12:09:44,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 1742 events. 978/1742 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9580 event pairs, 682 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 3327. Up to 1227 conditions per place. [2024-10-13 12:09:44,859 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 65 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-10-13 12:09:44,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 313 flow [2024-10-13 12:09:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:09:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:09:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-10-13 12:09:44,862 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-10-13 12:09:44,862 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 118 flow. Second operand 4 states and 128 transitions. [2024-10-13 12:09:44,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 313 flow [2024-10-13 12:09:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:09:44,865 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 149 flow [2024-10-13 12:09:44,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-10-13 12:09:44,866 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2024-10-13 12:09:44,866 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 149 flow [2024-10-13 12:09:44,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-10-13 12:09:44,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:44,867 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:09:44,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:09:44,868 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-13 12:09:44,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1056406379, now seen corresponding path program 1 times [2024-10-13 12:09:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968727308] [2024-10-13 12:09:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:44,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968727308] [2024-10-13 12:09:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968727308] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:44,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8346992] [2024-10-13 12:09:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:44,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:09:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:09:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:09:44,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-10-13 12:09:44,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-10-13 12:09:44,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:44,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-10-13 12:09:44,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:45,222 INFO L124 PetriNetUnfolderBase]: 945/1618 cut-off events. [2024-10-13 12:09:45,223 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-10-13 12:09:45,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1618 events. 945/1618 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8629 event pairs, 124 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 3507. Up to 1133 conditions per place. [2024-10-13 12:09:45,236 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 68 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-10-13 12:09:45,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 388 flow [2024-10-13 12:09:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:09:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:09:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-10-13 12:09:45,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-10-13 12:09:45,238 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 149 flow. Second operand 3 states and 100 transitions. [2024-10-13 12:09:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 388 flow [2024-10-13 12:09:45,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:09:45,242 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 224 flow [2024-10-13 12:09:45,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-10-13 12:09:45,243 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-10-13 12:09:45,243 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 224 flow [2024-10-13 12:09:45,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-10-13 12:09:45,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:45,243 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:09:45,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:09:45,244 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-13 12:09:45,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1056406380, now seen corresponding path program 1 times [2024-10-13 12:09:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622503411] [2024-10-13 12:09:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:45,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622503411] [2024-10-13 12:09:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622503411] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:45,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890030117] [2024-10-13 12:09:45,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:45,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:09:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:09:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:09:45,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 63 [2024-10-13 12:09:45,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-13 12:09:45,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:45,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 63 [2024-10-13 12:09:45,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:45,551 INFO L124 PetriNetUnfolderBase]: 732/1259 cut-off events. [2024-10-13 12:09:45,552 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2024-10-13 12:09:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 1259 events. 732/1259 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6290 event pairs, 107 based on Foata normal form. 90/1082 useless extension candidates. Maximal degree in co-relation 3229. Up to 916 conditions per place. [2024-10-13 12:09:45,564 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 54 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-10-13 12:09:45,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 375 flow [2024-10-13 12:09:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:09:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:09:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-10-13 12:09:45,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-13 12:09:45,566 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 224 flow. Second operand 3 states and 84 transitions. [2024-10-13 12:09:45,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 375 flow [2024-10-13 12:09:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:09:45,573 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 214 flow [2024-10-13 12:09:45,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-10-13 12:09:45,574 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2024-10-13 12:09:45,575 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 214 flow [2024-10-13 12:09:45,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-13 12:09:45,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:45,575 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-13 12:09:45,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:09:45,576 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-13 12:09:45,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:45,576 INFO L85 PathProgramCache]: Analyzing trace with hash -76789090, now seen corresponding path program 1 times [2024-10-13 12:09:45,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:45,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298467459] [2024-10-13 12:09:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:09:45,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:09:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:09:45,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:09:45,599 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:09:45,599 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-10-13 12:09:45,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-10-13 12:09:45,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-10-13 12:09:45,600 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-10-13 12:09:45,600 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-10-13 12:09:45,600 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (41 of 47 remaining) [2024-10-13 12:09:45,600 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-10-13 12:09:45,600 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 47 remaining) [2024-10-13 12:09:45,601 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-10-13 12:09:45,602 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (25 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 47 remaining) [2024-10-13 12:09:45,603 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-10-13 12:09:45,604 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-10-13 12:09:45,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 47 remaining) [2024-10-13 12:09:45,606 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 47 remaining) [2024-10-13 12:09:45,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-10-13 12:09:45,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-10-13 12:09:45,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:09:45,607 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-13 12:09:45,608 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:09:45,608 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:09:45,667 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:09:45,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 91 transitions, 200 flow [2024-10-13 12:09:45,680 INFO L124 PetriNetUnfolderBase]: 9/105 cut-off events. [2024-10-13 12:09:45,680 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 12:09:45,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 105 events. 9/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 484 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2024-10-13 12:09:45,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 91 transitions, 200 flow [2024-10-13 12:09:45,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 91 transitions, 200 flow [2024-10-13 12:09:45,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:09:45,685 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;@482dee2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:09:45,685 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-10-13 12:09:45,686 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:09:45,686 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:09:45,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:09:45,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:45,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:09:45,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:09:45,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:45,687 INFO L85 PathProgramCache]: Analyzing trace with hash 435616, now seen corresponding path program 1 times [2024-10-13 12:09:45,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:45,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378595757] [2024-10-13 12:09:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378595757] [2024-10-13 12:09:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378595757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100194122] [2024-10-13 12:09:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:45,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:09:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:09:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:09:45,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-13 12:09:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 200 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) [2024-10-13 12:09:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-13 12:09:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:09:57,784 INFO L124 PetriNetUnfolderBase]: 60462/86204 cut-off events. [2024-10-13 12:09:57,785 INFO L125 PetriNetUnfolderBase]: For 2429/2429 co-relation queries the response was YES. [2024-10-13 12:09:57,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169893 conditions, 86204 events. 60462/86204 cut-off events. For 2429/2429 co-relation queries the response was YES. Maximal size of possible extension queue 3228. Compared 598676 event pairs, 53730 based on Foata normal form. 0/40040 useless extension candidates. Maximal degree in co-relation 33051. Up to 82182 conditions per place. [2024-10-13 12:09:58,354 INFO L140 encePairwiseOnDemand]: 81/91 looper letters, 66 selfloop transitions, 0 changer transitions 0/79 dead transitions. [2024-10-13 12:09:58,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 308 flow [2024-10-13 12:09:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:09:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:09:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 104 transitions. [2024-10-13 12:09:58,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:09:58,359 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 200 flow. Second operand 2 states and 104 transitions. [2024-10-13 12:09:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 308 flow [2024-10-13 12:09:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-13 12:09:58,365 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 174 flow [2024-10-13 12:09:58,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=174, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-13 12:09:58,366 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -8 predicate places. [2024-10-13 12:09:58,368 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 174 flow [2024-10-13 12:09:58,369 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) [2024-10-13 12:09:58,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:58,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:09:58,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:09:58,369 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:09:58,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 418692856, now seen corresponding path program 1 times [2024-10-13 12:09:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757230145] [2024-10-13 12:09:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757230145] [2024-10-13 12:09:58,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757230145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:58,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:58,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:09:58,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249191716] [2024-10-13 12:09:58,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:58,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:09:58,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:09:58,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:09:58,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-13 12:09:58,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-10-13 12:09:58,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:58,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-13 12:09:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:05,128 INFO L124 PetriNetUnfolderBase]: 43095/65066 cut-off events. [2024-10-13 12:10:05,128 INFO L125 PetriNetUnfolderBase]: For 1050/1050 co-relation queries the response was YES. [2024-10-13 12:10:05,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126111 conditions, 65066 events. 43095/65066 cut-off events. For 1050/1050 co-relation queries the response was YES. Maximal size of possible extension queue 3047. Compared 496612 event pairs, 26389 based on Foata normal form. 0/34094 useless extension candidates. Maximal degree in co-relation 126105. Up to 39243 conditions per place. [2024-10-13 12:10:05,593 INFO L140 encePairwiseOnDemand]: 51/91 looper letters, 138 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-10-13 12:10:05,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 188 transitions, 757 flow [2024-10-13 12:10:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:10:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:10:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2024-10-13 12:10:05,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6840659340659341 [2024-10-13 12:10:05,595 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 174 flow. Second operand 4 states and 249 transitions. [2024-10-13 12:10:05,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 188 transitions, 757 flow [2024-10-13 12:10:05,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 188 transitions, 757 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:05,602 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 490 flow [2024-10-13 12:10:05,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=490, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2024-10-13 12:10:05,604 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -2 predicate places. [2024-10-13 12:10:05,605 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 490 flow [2024-10-13 12:10:05,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-10-13 12:10:05,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:05,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:10:05,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 12:10:05,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:05,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 418692857, now seen corresponding path program 1 times [2024-10-13 12:10:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993738451] [2024-10-13 12:10:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993738451] [2024-10-13 12:10:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993738451] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:05,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:05,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78554808] [2024-10-13 12:10:05,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:05,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:10:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:10:05,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:10:05,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-13 12:10:05,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 490 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-10-13 12:10:05,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:05,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-13 12:10:05,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:10,191 INFO L124 PetriNetUnfolderBase]: 24834/38246 cut-off events. [2024-10-13 12:10:10,192 INFO L125 PetriNetUnfolderBase]: For 5227/5227 co-relation queries the response was YES. [2024-10-13 12:10:10,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100394 conditions, 38246 events. 24834/38246 cut-off events. For 5227/5227 co-relation queries the response was YES. Maximal size of possible extension queue 1960. Compared 283202 event pairs, 13465 based on Foata normal form. 5823/31013 useless extension candidates. Maximal degree in co-relation 100385. Up to 20379 conditions per place. [2024-10-13 12:10:10,490 INFO L140 encePairwiseOnDemand]: 75/91 looper letters, 126 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2024-10-13 12:10:10,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 146 transitions, 876 flow [2024-10-13 12:10:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:10:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:10:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-10-13 12:10:10,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-10-13 12:10:10,493 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 490 flow. Second operand 4 states and 177 transitions. [2024-10-13 12:10:10,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 146 transitions, 876 flow [2024-10-13 12:10:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 876 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:10,526 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 486 flow [2024-10-13 12:10:10,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=81, PETRI_TRANSITIONS=106} [2024-10-13 12:10:10,527 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -8 predicate places. [2024-10-13 12:10:10,527 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 486 flow [2024-10-13 12:10:10,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-10-13 12:10:10,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:10,527 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:10,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:10:10,528 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:10,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1363075007, now seen corresponding path program 1 times [2024-10-13 12:10:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694325222] [2024-10-13 12:10:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694325222] [2024-10-13 12:10:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694325222] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:10,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:10,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405111891] [2024-10-13 12:10:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:10,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:10,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:10,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 91 [2024-10-13 12:10:10,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 106 transitions, 486 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-10-13 12:10:10,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:10,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 91 [2024-10-13 12:10:10,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:14,610 INFO L124 PetriNetUnfolderBase]: 26571/39943 cut-off events. [2024-10-13 12:10:14,610 INFO L125 PetriNetUnfolderBase]: For 11368/11368 co-relation queries the response was YES. [2024-10-13 12:10:14,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109284 conditions, 39943 events. 26571/39943 cut-off events. For 11368/11368 co-relation queries the response was YES. Maximal size of possible extension queue 1905. Compared 288954 event pairs, 6830 based on Foata normal form. 0/27895 useless extension candidates. Maximal degree in co-relation 109274. Up to 21964 conditions per place. [2024-10-13 12:10:14,980 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 154 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-10-13 12:10:14,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 185 transitions, 1210 flow [2024-10-13 12:10:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-10-13 12:10:14,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-10-13 12:10:14,986 INFO L175 Difference]: Start difference. First operand has 81 places, 106 transitions, 486 flow. Second operand 3 states and 150 transitions. [2024-10-13 12:10:14,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 185 transitions, 1210 flow [2024-10-13 12:10:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 185 transitions, 1198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:15,541 INFO L231 Difference]: Finished difference. Result has 83 places, 122 transitions, 682 flow [2024-10-13 12:10:15,542 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=122} [2024-10-13 12:10:15,543 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2024-10-13 12:10:15,543 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 122 transitions, 682 flow [2024-10-13 12:10:15,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-10-13 12:10:15,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:15,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:15,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:10:15,543 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:15,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1363075006, now seen corresponding path program 1 times [2024-10-13 12:10:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336228901] [2024-10-13 12:10:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:15,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:15,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336228901] [2024-10-13 12:10:15,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336228901] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882472551] [2024-10-13 12:10:15,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:15,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:15,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 91 [2024-10-13 12:10:15,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 122 transitions, 682 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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) [2024-10-13 12:10:15,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:15,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 91 [2024-10-13 12:10:15,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:19,761 INFO L124 PetriNetUnfolderBase]: 21181/32176 cut-off events. [2024-10-13 12:10:19,762 INFO L125 PetriNetUnfolderBase]: For 19925/19925 co-relation queries the response was YES. [2024-10-13 12:10:19,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97441 conditions, 32176 events. 21181/32176 cut-off events. For 19925/19925 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 229716 event pairs, 4516 based on Foata normal form. 1392/24979 useless extension candidates. Maximal degree in co-relation 97430. Up to 22665 conditions per place. [2024-10-13 12:10:20,027 INFO L140 encePairwiseOnDemand]: 85/91 looper letters, 153 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2024-10-13 12:10:20,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 175 transitions, 1270 flow [2024-10-13 12:10:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-10-13 12:10:20,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-10-13 12:10:20,030 INFO L175 Difference]: Start difference. First operand has 83 places, 122 transitions, 682 flow. Second operand 3 states and 135 transitions. [2024-10-13 12:10:20,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 175 transitions, 1270 flow [2024-10-13 12:10:20,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 175 transitions, 1230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:20,102 INFO L231 Difference]: Finished difference. Result has 80 places, 117 transitions, 638 flow [2024-10-13 12:10:20,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=638, PETRI_PLACES=80, PETRI_TRANSITIONS=117} [2024-10-13 12:10:20,108 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -9 predicate places. [2024-10-13 12:10:20,109 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 117 transitions, 638 flow [2024-10-13 12:10:20,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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) [2024-10-13 12:10:20,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:20,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:20,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:10:20,109 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:20,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1313292464, now seen corresponding path program 1 times [2024-10-13 12:10:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:20,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152121252] [2024-10-13 12:10:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:20,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:20,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152121252] [2024-10-13 12:10:20,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152121252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:20,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:20,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:20,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878650363] [2024-10-13 12:10:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:20,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:20,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:20,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 91 [2024-10-13 12:10:20,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 117 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-10-13 12:10:20,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:20,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 91 [2024-10-13 12:10:20,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:24,828 INFO L124 PetriNetUnfolderBase]: 23833/36255 cut-off events. [2024-10-13 12:10:24,830 INFO L125 PetriNetUnfolderBase]: For 21170/21206 co-relation queries the response was YES. [2024-10-13 12:10:24,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107553 conditions, 36255 events. 23833/36255 cut-off events. For 21170/21206 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 264965 event pairs, 5177 based on Foata normal form. 6/26978 useless extension candidates. Maximal degree in co-relation 107542. Up to 17258 conditions per place. [2024-10-13 12:10:25,192 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 159 selfloop transitions, 28 changer transitions 0/198 dead transitions. [2024-10-13 12:10:25,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 198 transitions, 1465 flow [2024-10-13 12:10:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-13 12:10:25,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-10-13 12:10:25,194 INFO L175 Difference]: Start difference. First operand has 80 places, 117 transitions, 638 flow. Second operand 3 states and 145 transitions. [2024-10-13 12:10:25,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 198 transitions, 1465 flow [2024-10-13 12:10:25,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 198 transitions, 1429 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:25,283 INFO L231 Difference]: Finished difference. Result has 82 places, 139 transitions, 942 flow [2024-10-13 12:10:25,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=942, PETRI_PLACES=82, PETRI_TRANSITIONS=139} [2024-10-13 12:10:25,284 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2024-10-13 12:10:25,284 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 139 transitions, 942 flow [2024-10-13 12:10:25,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-10-13 12:10:25,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:25,285 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:25,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 12:10:25,285 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:25,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1313292465, now seen corresponding path program 1 times [2024-10-13 12:10:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:25,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581994963] [2024-10-13 12:10:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:25,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581994963] [2024-10-13 12:10:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581994963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:25,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081754887] [2024-10-13 12:10:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:25,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:25,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 91 [2024-10-13 12:10:25,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 139 transitions, 942 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-10-13 12:10:25,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:25,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 91 [2024-10-13 12:10:25,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:29,327 INFO L124 PetriNetUnfolderBase]: 19443/29728 cut-off events. [2024-10-13 12:10:29,328 INFO L125 PetriNetUnfolderBase]: For 30324/30360 co-relation queries the response was YES. [2024-10-13 12:10:29,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95680 conditions, 29728 events. 19443/29728 cut-off events. For 30324/30360 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 210651 event pairs, 3620 based on Foata normal form. 1161/24249 useless extension candidates. Maximal degree in co-relation 95668. Up to 19666 conditions per place. [2024-10-13 12:10:29,611 INFO L140 encePairwiseOnDemand]: 85/91 looper letters, 160 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2024-10-13 12:10:29,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 190 transitions, 1581 flow [2024-10-13 12:10:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-10-13 12:10:29,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-10-13 12:10:29,613 INFO L175 Difference]: Start difference. First operand has 82 places, 139 transitions, 942 flow. Second operand 3 states and 130 transitions. [2024-10-13 12:10:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 190 transitions, 1581 flow [2024-10-13 12:10:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 190 transitions, 1525 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:29,710 INFO L231 Difference]: Finished difference. Result has 79 places, 134 transitions, 898 flow [2024-10-13 12:10:29,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=898, PETRI_PLACES=79, PETRI_TRANSITIONS=134} [2024-10-13 12:10:29,711 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -10 predicate places. [2024-10-13 12:10:29,711 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 134 transitions, 898 flow [2024-10-13 12:10:29,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-10-13 12:10:29,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:29,712 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:29,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 12:10:29,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err14ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:29,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1548825172, now seen corresponding path program 1 times [2024-10-13 12:10:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:29,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490579278] [2024-10-13 12:10:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490579278] [2024-10-13 12:10:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490579278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 12:10:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818376093] [2024-10-13 12:10:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:30,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:10:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:10:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:10:30,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 91 [2024-10-13 12:10:30,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 134 transitions, 898 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2024-10-13 12:10:30,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:30,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 91 [2024-10-13 12:10:30,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:36,624 INFO L124 PetriNetUnfolderBase]: 37856/58740 cut-off events. [2024-10-13 12:10:36,624 INFO L125 PetriNetUnfolderBase]: For 51255/51546 co-relation queries the response was YES. [2024-10-13 12:10:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184301 conditions, 58740 events. 37856/58740 cut-off events. For 51255/51546 co-relation queries the response was YES. Maximal size of possible extension queue 2368. Compared 460970 event pairs, 6373 based on Foata normal form. 33/45906 useless extension candidates. Maximal degree in co-relation 184289. Up to 24605 conditions per place. [2024-10-13 12:10:37,417 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 397 selfloop transitions, 47 changer transitions 0/455 dead transitions. [2024-10-13 12:10:37,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 455 transitions, 3952 flow [2024-10-13 12:10:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 287 transitions. [2024-10-13 12:10:37,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-10-13 12:10:37,420 INFO L175 Difference]: Start difference. First operand has 79 places, 134 transitions, 898 flow. Second operand 6 states and 287 transitions. [2024-10-13 12:10:37,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 455 transitions, 3952 flow [2024-10-13 12:10:37,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 455 transitions, 3798 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:37,814 INFO L231 Difference]: Finished difference. Result has 85 places, 186 transitions, 1346 flow [2024-10-13 12:10:37,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1346, PETRI_PLACES=85, PETRI_TRANSITIONS=186} [2024-10-13 12:10:37,816 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2024-10-13 12:10:37,816 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 186 transitions, 1346 flow [2024-10-13 12:10:37,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2024-10-13 12:10:37,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:37,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:37,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-13 12:10:37,817 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:37,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash 433607040, now seen corresponding path program 1 times [2024-10-13 12:10:37,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:37,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129207947] [2024-10-13 12:10:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:10:37,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129207947] [2024-10-13 12:10:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129207947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952610387] [2024-10-13 12:10:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:37,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:37,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:37,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:37,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:10:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:37,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:10:37,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:38,080 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:10:38,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-13 12:10:38,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:10:38,156 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:10:38,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:10:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:10:38,174 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952610387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-10-13 12:10:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747061236] [2024-10-13 12:10:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:38,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:10:38,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 91 [2024-10-13 12:10:38,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 186 transitions, 1346 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2024-10-13 12:10:38,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:38,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 91 [2024-10-13 12:10:38,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:44,926 INFO L124 PetriNetUnfolderBase]: 36978/58062 cut-off events. [2024-10-13 12:10:44,927 INFO L125 PetriNetUnfolderBase]: For 57225/57480 co-relation queries the response was YES. [2024-10-13 12:10:45,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195264 conditions, 58062 events. 36978/58062 cut-off events. For 57225/57480 co-relation queries the response was YES. Maximal size of possible extension queue 2540. Compared 469381 event pairs, 6198 based on Foata normal form. 1116/49686 useless extension candidates. Maximal degree in co-relation 195249. Up to 25154 conditions per place. [2024-10-13 12:10:45,568 INFO L140 encePairwiseOnDemand]: 57/91 looper letters, 299 selfloop transitions, 98 changer transitions 0/411 dead transitions. [2024-10-13 12:10:45,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 411 transitions, 3609 flow [2024-10-13 12:10:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-10-13 12:10:45,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-10-13 12:10:45,570 INFO L175 Difference]: Start difference. First operand has 85 places, 186 transitions, 1346 flow. Second operand 5 states and 247 transitions. [2024-10-13 12:10:45,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 411 transitions, 3609 flow [2024-10-13 12:10:46,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 411 transitions, 3609 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:46,076 INFO L231 Difference]: Finished difference. Result has 92 places, 249 transitions, 2369 flow [2024-10-13 12:10:46,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2369, PETRI_PLACES=92, PETRI_TRANSITIONS=249} [2024-10-13 12:10:46,077 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2024-10-13 12:10:46,077 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 249 transitions, 2369 flow [2024-10-13 12:10:46,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2024-10-13 12:10:46,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:46,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:46,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:46,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:10:46,283 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-13 12:10:46,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2057326377, now seen corresponding path program 1 times [2024-10-13 12:10:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398345955] [2024-10-13 12:10:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:46,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398345955] [2024-10-13 12:10:46,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398345955] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:46,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496652247] [2024-10-13 12:10:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:46,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:10:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:10:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:10:46,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-13 12:10:46,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 249 transitions, 2369 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-10-13 12:10:46,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:46,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-13 12:10:46,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand