./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/11_fmaxsymopt-zero.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/11_fmaxsymopt-zero.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 33726888f4084a4eef0b3c291c9d0f3df5c2ad2aa8559b997fd648ce422ca927 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:10:22,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:10:22,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:10:22,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:10:22,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:10:22,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:10:22,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:10:22,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:10:22,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:10:22,482 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:10:22,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:10:22,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:10:22,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:10:22,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:10:22,485 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:10:22,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:10:22,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:10:22,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:10:22,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:10:22,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:10:22,486 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:10:22,487 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:10:22,487 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:10:22,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:10:22,488 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:10:22,488 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:10:22,488 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:10:22,488 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:10:22,488 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:10:22,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:10:22,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:10:22,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:10:22,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:10:22,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:22,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:10:22,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:10:22,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:10:22,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:10:22,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:10:22,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:10:22,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:10:22,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:10:22,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33726888f4084a4eef0b3c291c9d0f3df5c2ad2aa8559b997fd648ce422ca927 [2024-10-13 12:10:22,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:10:22,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:10:22,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:10:22,751 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:10:22,752 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:10:22,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-10-13 12:10:24,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:10:24,348 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:10:24,349 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-zero.i [2024-10-13 12:10:24,367 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea09b5706/0f964c57d42643da998062c1e42daa80/FLAG3c4e874ec [2024-10-13 12:10:24,681 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea09b5706/0f964c57d42643da998062c1e42daa80 [2024-10-13 12:10:24,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:10:24,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:10:24,686 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:24,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:10:24,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:10:24,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:24" (1/1) ... [2024-10-13 12:10:24,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543f91b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:24, skipping insertion in model container [2024-10-13 12:10:24,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:24" (1/1) ... [2024-10-13 12:10:24,743 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:10:25,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:25,093 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:10:25,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:25,213 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:10:25,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25 WrapperNode [2024-10-13 12:10:25,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:25,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:25,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:10:25,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:10:25,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,255 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2024-10-13 12:10:25,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:25,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:10:25,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:10:25,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:10:25,268 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,271 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,283 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 0 writes are split as follows [0, 0, 0]. [2024-10-13 12:10:25,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,291 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,293 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:10:25,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:10:25,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:10:25,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:10:25,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (1/1) ... [2024-10-13 12:10:25,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:25,334 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 12:10:25,337 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 12:10:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:10:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 12:10:25,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:10:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:10:25,382 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:10:25,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:10:25,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:10:25,385 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 12:10:25,509 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:10:25,511 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:10:25,658 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:10:25,659 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:10:25,758 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:10:25,758 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 12:10:25,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:25 BoogieIcfgContainer [2024-10-13 12:10:25,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:10:25,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:10:25,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:10:25,765 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:10:25,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:10:24" (1/3) ... [2024-10-13 12:10:25,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ba308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:25, skipping insertion in model container [2024-10-13 12:10:25,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:25" (2/3) ... [2024-10-13 12:10:25,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ba308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:25, skipping insertion in model container [2024-10-13 12:10:25,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:25" (3/3) ... [2024-10-13 12:10:25,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-zero.i [2024-10-13 12:10:25,782 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:10:25,783 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-10-13 12:10:25,783 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:10:25,826 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:25,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 29 transitions, 62 flow [2024-10-13 12:10:25,877 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-10-13 12:10:25,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:25,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 63 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-10-13 12:10:25,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 29 transitions, 62 flow [2024-10-13 12:10:25,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 29 transitions, 62 flow [2024-10-13 12:10:25,894 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:25,901 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;@61ed1bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:25,901 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-13 12:10:25,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:25,904 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:10:25,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:25,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:25,906 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:25,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-10-13 12:10:25,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 267968, now seen corresponding path program 1 times [2024-10-13 12:10:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085618639] [2024-10-13 12:10:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:26,060 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 12:10:26,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085618639] [2024-10-13 12:10:26,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085618639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805427787] [2024-10-13 12:10:26,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:26,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:10:26,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:10:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:10:26,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-10-13 12:10:26,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 12:10:26,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:26,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-10-13 12:10:26,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:26,216 INFO L124 PetriNetUnfolderBase]: 18/68 cut-off events. [2024-10-13 12:10:26,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:26,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 68 events. 18/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 182 event pairs, 14 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 102. Up to 44 conditions per place. [2024-10-13 12:10:26,223 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 12 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-10-13 12:10:26,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 74 flow [2024-10-13 12:10:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:10:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:10:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-10-13 12:10:26,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6724137931034483 [2024-10-13 12:10:26,235 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 62 flow. Second operand 2 states and 39 transitions. [2024-10-13 12:10:26,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 74 flow [2024-10-13 12:10:26,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:26,238 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2024-10-13 12:10:26,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-10-13 12:10:26,243 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-10-13 12:10:26,243 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2024-10-13 12:10:26,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 12:10:26,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:26,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-13 12:10:26,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:10:26,244 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2024-10-13 12:10:26,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -606227341, now seen corresponding path program 1 times [2024-10-13 12:10:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331026298] [2024-10-13 12:10:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:26,281 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:26,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:26,319 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:26,321 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-10-13 12:10:26,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-10-13 12:10:26,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-10-13 12:10:26,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2024-10-13 12:10:26,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-10-13 12:10:26,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-10-13 12:10:26,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-10-13 12:10:26,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-10-13 12:10:26,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:10:26,325 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 12:10:26,329 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:26,329 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:10:26,379 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:26,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 51 transitions, 112 flow [2024-10-13 12:10:26,405 INFO L124 PetriNetUnfolderBase]: 8/60 cut-off events. [2024-10-13 12:10:26,405 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:10:26,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 60 events. 8/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 167 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-10-13 12:10:26,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 51 transitions, 112 flow [2024-10-13 12:10:26,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 51 transitions, 112 flow [2024-10-13 12:10:26,412 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:26,413 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;@61ed1bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:26,413 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-10-13 12:10:26,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:26,415 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:10:26,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:26,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:26,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:26,415 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-13 12:10:26,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash 318611, now seen corresponding path program 1 times [2024-10-13 12:10:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:26,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273934300] [2024-10-13 12:10:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:26,442 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 12:10:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273934300] [2024-10-13 12:10:26,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273934300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:26,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:26,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:26,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723485150] [2024-10-13 12:10:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:26,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:10:26,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:26,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:10:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:10:26,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 51 [2024-10-13 12:10:26,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 112 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:26,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:26,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 51 [2024-10-13 12:10:26,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:26,633 INFO L124 PetriNetUnfolderBase]: 361/865 cut-off events. [2024-10-13 12:10:26,635 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-13 12:10:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 865 events. 361/865 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5173 event pairs, 294 based on Foata normal form. 140/940 useless extension candidates. Maximal degree in co-relation 778. Up to 564 conditions per place. [2024-10-13 12:10:26,648 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 21 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2024-10-13 12:10:26,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 136 flow [2024-10-13 12:10:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:10:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:10:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2024-10-13 12:10:26,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-10-13 12:10:26,651 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 112 flow. Second operand 2 states and 70 transitions. [2024-10-13 12:10:26,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 136 flow [2024-10-13 12:10:26,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:26,653 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 94 flow [2024-10-13 12:10:26,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-10-13 12:10:26,655 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-10-13 12:10:26,655 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 94 flow [2024-10-13 12:10:26,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:26,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:26,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:26,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:10:26,656 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-13 12:10:26,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 903193000, now seen corresponding path program 1 times [2024-10-13 12:10:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:26,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479413686] [2024-10-13 12:10:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:26,793 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 12:10:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479413686] [2024-10-13 12:10:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479413686] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555511174] [2024-10-13 12:10:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:26,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:26,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 51 [2024-10-13 12:10:26,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 12:10:26,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:26,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 51 [2024-10-13 12:10:26,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:26,934 INFO L124 PetriNetUnfolderBase]: 361/849 cut-off events. [2024-10-13 12:10:26,934 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-13 12:10:26,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 849 events. 361/849 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4984 event pairs, 294 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 1438. Up to 563 conditions per place. [2024-10-13 12:10:26,939 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 20 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2024-10-13 12:10:26,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 132 flow [2024-10-13 12:10:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-10-13 12:10:26,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5424836601307189 [2024-10-13 12:10:26,940 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 94 flow. Second operand 3 states and 83 transitions. [2024-10-13 12:10:26,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 132 flow [2024-10-13 12:10:26,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:26,942 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 92 flow [2024-10-13 12:10:26,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-10-13 12:10:26,943 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-10-13 12:10:26,946 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 92 flow [2024-10-13 12:10:26,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 12:10:26,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:26,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:26,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:10:26,947 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-13 12:10:26,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 903193001, now seen corresponding path program 1 times [2024-10-13 12:10:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091122342] [2024-10-13 12:10:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:27,170 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 12:10:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:27,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091122342] [2024-10-13 12:10:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091122342] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:27,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:27,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103109736] [2024-10-13 12:10:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:27,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:27,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-10-13 12:10:27,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:27,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:27,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-10-13 12:10:27,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:27,415 INFO L124 PetriNetUnfolderBase]: 477/1311 cut-off events. [2024-10-13 12:10:27,416 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-13 12:10:27,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 1311 events. 477/1311 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9387 event pairs, 258 based on Foata normal form. 27/1262 useless extension candidates. Maximal degree in co-relation 2120. Up to 563 conditions per place. [2024-10-13 12:10:27,424 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-10-13 12:10:27,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 242 flow [2024-10-13 12:10:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-10-13 12:10:27,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-13 12:10:27,427 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 5 states and 153 transitions. [2024-10-13 12:10:27,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 242 flow [2024-10-13 12:10:27,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:27,429 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 118 flow [2024-10-13 12:10:27,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-10-13 12:10:27,430 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2024-10-13 12:10:27,431 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 118 flow [2024-10-13 12:10:27,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:27,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:27,432 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-13 12:10:27,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:10:27,432 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2024-10-13 12:10:27,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2092663819, now seen corresponding path program 1 times [2024-10-13 12:10:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:27,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821546025] [2024-10-13 12:10:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:27,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:27,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:27,463 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:27,463 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-10-13 12:10:27,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-10-13 12:10:27,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-10-13 12:10:27,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:10:27,465 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-13 12:10:27,465 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:27,466 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:10:27,502 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 73 transitions, 164 flow [2024-10-13 12:10:27,514 INFO L124 PetriNetUnfolderBase]: 12/87 cut-off events. [2024-10-13 12:10:27,515 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 12:10:27,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 87 events. 12/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 293 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2024-10-13 12:10:27,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 73 transitions, 164 flow [2024-10-13 12:10:27,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 73 transitions, 164 flow [2024-10-13 12:10:27,519 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:27,520 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;@61ed1bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:27,521 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-13 12:10:27,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:27,522 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:10:27,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:27,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:27,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:27,523 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:27,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash 391100, now seen corresponding path program 1 times [2024-10-13 12:10:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9352364] [2024-10-13 12:10:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:27,538 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 12:10:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9352364] [2024-10-13 12:10:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9352364] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:27,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471988370] [2024-10-13 12:10:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:27,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:10:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:10:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:10:27,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 73 [2024-10-13 12:10:27,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 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 12:10:27,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:27,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 73 [2024-10-13 12:10:27,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:28,292 INFO L124 PetriNetUnfolderBase]: 4643/8805 cut-off events. [2024-10-13 12:10:28,293 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2024-10-13 12:10:28,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15351 conditions, 8805 events. 4643/8805 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 69408 event pairs, 3878 based on Foata normal form. 1869/10115 useless extension candidates. Maximal degree in co-relation 1471. Up to 6260 conditions per place. [2024-10-13 12:10:28,359 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 30 selfloop transitions, 0 changer transitions 0/61 dead transitions. [2024-10-13 12:10:28,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 200 flow [2024-10-13 12:10:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:10:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:10:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2024-10-13 12:10:28,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6917808219178082 [2024-10-13 12:10:28,363 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 164 flow. Second operand 2 states and 101 transitions. [2024-10-13 12:10:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 200 flow [2024-10-13 12:10:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:28,366 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 138 flow [2024-10-13 12:10:28,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-10-13 12:10:28,367 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2024-10-13 12:10:28,367 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 138 flow [2024-10-13 12:10:28,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 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 12:10:28,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:28,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:28,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:10:28,369 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:28,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1231556397, now seen corresponding path program 1 times [2024-10-13 12:10:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107567526] [2024-10-13 12:10:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:28,418 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 12:10:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:28,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107567526] [2024-10-13 12:10:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107567526] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721403324] [2024-10-13 12:10:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:28,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:28,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 73 [2024-10-13 12:10:28,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 12:10:28,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:28,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 73 [2024-10-13 12:10:28,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:29,182 INFO L124 PetriNetUnfolderBase]: 4643/8667 cut-off events. [2024-10-13 12:10:29,182 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2024-10-13 12:10:29,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15150 conditions, 8667 events. 4643/8667 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 66987 event pairs, 3878 based on Foata normal form. 0/8246 useless extension candidates. Maximal degree in co-relation 15144. Up to 6259 conditions per place. [2024-10-13 12:10:29,243 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 29 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-10-13 12:10:29,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 192 flow [2024-10-13 12:10:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-10-13 12:10:29,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-10-13 12:10:29,245 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 138 flow. Second operand 3 states and 120 transitions. [2024-10-13 12:10:29,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 192 flow [2024-10-13 12:10:29,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:29,249 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 134 flow [2024-10-13 12:10:29,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-13 12:10:29,249 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-10-13 12:10:29,250 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 134 flow [2024-10-13 12:10:29,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 12:10:29,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:29,251 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:29,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:10:29,251 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:29,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1231556396, now seen corresponding path program 1 times [2024-10-13 12:10:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830008963] [2024-10-13 12:10:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:29,424 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 12:10:29,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830008963] [2024-10-13 12:10:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830008963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:29,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:29,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:29,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952773749] [2024-10-13 12:10:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:29,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:29,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-10-13 12:10:29,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 12:10:29,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:29,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-10-13 12:10:29,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:30,608 INFO L124 PetriNetUnfolderBase]: 6278/13277 cut-off events. [2024-10-13 12:10:30,609 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-10-13 12:10:30,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 13277 events. 6278/13277 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 123617 event pairs, 3878 based on Foata normal form. 219/12737 useless extension candidates. Maximal degree in co-relation 22182. Up to 6259 conditions per place. [2024-10-13 12:10:30,688 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 68 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-10-13 12:10:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 384 flow [2024-10-13 12:10:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-10-13 12:10:30,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6301369863013698 [2024-10-13 12:10:30,690 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 134 flow. Second operand 5 states and 230 transitions. [2024-10-13 12:10:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 384 flow [2024-10-13 12:10:30,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:30,693 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 160 flow [2024-10-13 12:10:30,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-10-13 12:10:30,694 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-10-13 12:10:30,694 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 160 flow [2024-10-13 12:10:30,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 12:10:30,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:30,694 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:30,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:10:30,694 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:30,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1464526729, now seen corresponding path program 1 times [2024-10-13 12:10:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527526845] [2024-10-13 12:10:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:30,804 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 12:10:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527526845] [2024-10-13 12:10:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527526845] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:30,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:30,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:30,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863081720] [2024-10-13 12:10:30,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:30,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:30,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:30,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:30,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-10-13 12:10:30,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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 12:10:30,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:30,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-10-13 12:10:30,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:32,104 INFO L124 PetriNetUnfolderBase]: 7752/16493 cut-off events. [2024-10-13 12:10:32,104 INFO L125 PetriNetUnfolderBase]: For 3947/4223 co-relation queries the response was YES. [2024-10-13 12:10:32,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30311 conditions, 16493 events. 7752/16493 cut-off events. For 3947/4223 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 158281 event pairs, 4542 based on Foata normal form. 270/15878 useless extension candidates. Maximal degree in co-relation 30302. Up to 7823 conditions per place. [2024-10-13 12:10:32,208 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 72 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2024-10-13 12:10:32,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 448 flow [2024-10-13 12:10:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-10-13 12:10:32,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6246575342465753 [2024-10-13 12:10:32,210 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 160 flow. Second operand 5 states and 228 transitions. [2024-10-13 12:10:32,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 448 flow [2024-10-13 12:10:32,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:32,214 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 186 flow [2024-10-13 12:10:32,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-10-13 12:10:32,215 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-10-13 12:10:32,215 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 186 flow [2024-10-13 12:10:32,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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 12:10:32,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:32,215 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:32,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:10:32,216 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:32,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1685526020, now seen corresponding path program 1 times [2024-10-13 12:10:32,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:32,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925847719] [2024-10-13 12:10:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:32,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:32,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:32,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925847719] [2024-10-13 12:10:32,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925847719] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:32,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706375311] [2024-10-13 12:10:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:32,386 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 12:10:32,387 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 12:10:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:32,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:10:32,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:32,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706375311] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:32,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-10-13 12:10:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460999139] [2024-10-13 12:10:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:32,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:10:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:10:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:10:32,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-10-13 12:10:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 186 flow. Second operand has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 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 12:10:32,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:32,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-10-13 12:10:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:34,910 INFO L124 PetriNetUnfolderBase]: 12261/26579 cut-off events. [2024-10-13 12:10:34,911 INFO L125 PetriNetUnfolderBase]: For 8311/8671 co-relation queries the response was YES. [2024-10-13 12:10:34,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52025 conditions, 26579 events. 12261/26579 cut-off events. For 8311/8671 co-relation queries the response was YES. Maximal size of possible extension queue 1158. Compared 276627 event pairs, 4896 based on Foata normal form. 273/25859 useless extension candidates. Maximal degree in co-relation 52014. Up to 8084 conditions per place. [2024-10-13 12:10:35,102 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 101 selfloop transitions, 7 changer transitions 0/135 dead transitions. [2024-10-13 12:10:35,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 135 transitions, 640 flow [2024-10-13 12:10:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 287 transitions. [2024-10-13 12:10:35,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6552511415525114 [2024-10-13 12:10:35,104 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 186 flow. Second operand 6 states and 287 transitions. [2024-10-13 12:10:35,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 135 transitions, 640 flow [2024-10-13 12:10:35,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 135 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:35,114 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 226 flow [2024-10-13 12:10:35,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2024-10-13 12:10:35,115 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-10-13 12:10:35,116 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 226 flow [2024-10-13 12:10:35,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 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 12:10:35,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:35,117 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:35,133 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 12:10:35,317 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,SelfDestructingSolverStorable10 [2024-10-13 12:10:35,318 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:35,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -711719525, now seen corresponding path program 1 times [2024-10-13 12:10:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90448082] [2024-10-13 12:10:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:35,493 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 12:10:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90448082] [2024-10-13 12:10:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90448082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:35,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998892756] [2024-10-13 12:10:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:35,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:35,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:35,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-10-13 12:10:35,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 12:10:35,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:35,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-10-13 12:10:35,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:37,121 INFO L124 PetriNetUnfolderBase]: 11549/21257 cut-off events. [2024-10-13 12:10:37,121 INFO L125 PetriNetUnfolderBase]: For 11280/11655 co-relation queries the response was YES. [2024-10-13 12:10:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48991 conditions, 21257 events. 11549/21257 cut-off events. For 11280/11655 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 185111 event pairs, 1666 based on Foata normal form. 819/21358 useless extension candidates. Maximal degree in co-relation 48978. Up to 12961 conditions per place. [2024-10-13 12:10:37,258 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 56 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-10-13 12:10:37,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 414 flow [2024-10-13 12:10:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-13 12:10:37,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6621004566210046 [2024-10-13 12:10:37,260 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 226 flow. Second operand 3 states and 145 transitions. [2024-10-13 12:10:37,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 414 flow [2024-10-13 12:10:37,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:37,295 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 227 flow [2024-10-13 12:10:37,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-10-13 12:10:37,296 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-10-13 12:10:37,296 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 227 flow [2024-10-13 12:10:37,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 12:10:37,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:37,297 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-13 12:10:37,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:10:37,297 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 11 more)] === [2024-10-13 12:10:37,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash -327760110, now seen corresponding path program 1 times [2024-10-13 12:10:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313650678] [2024-10-13 12:10:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:37,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:37,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:37,324 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-10-13 12:10:37,324 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2024-10-13 12:10:37,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-10-13 12:10:37,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-10-13 12:10:37,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-10-13 12:10:37,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:10:37,325 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:37,326 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:37,326 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 12:10:37,359 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:37,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 95 transitions, 218 flow [2024-10-13 12:10:37,368 INFO L124 PetriNetUnfolderBase]: 16/114 cut-off events. [2024-10-13 12:10:37,368 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:10:37,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 114 events. 16/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 409 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 99. Up to 5 conditions per place. [2024-10-13 12:10:37,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 95 transitions, 218 flow [2024-10-13 12:10:37,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 95 transitions, 218 flow [2024-10-13 12:10:37,370 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:37,371 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;@61ed1bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:37,371 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-13 12:10:37,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:37,372 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:10:37,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:37,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:37,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:37,373 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-13 12:10:37,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash 485435, now seen corresponding path program 1 times [2024-10-13 12:10:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:37,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542219058] [2024-10-13 12:10:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:37,381 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 12:10:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:37,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542219058] [2024-10-13 12:10:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542219058] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:37,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:10:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226004277] [2024-10-13 12:10:37,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:37,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:10:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:10:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:10:37,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 95 [2024-10-13 12:10:37,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 12:10:37,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:37,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 95 [2024-10-13 12:10:37,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:44,625 INFO L124 PetriNetUnfolderBase]: 51169/84541 cut-off events. [2024-10-13 12:10:44,626 INFO L125 PetriNetUnfolderBase]: For 6918/6918 co-relation queries the response was YES. [2024-10-13 12:10:44,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151504 conditions, 84541 events. 51169/84541 cut-off events. For 6918/6918 co-relation queries the response was YES. Maximal size of possible extension queue 3512. Compared 774306 event pairs, 43302 based on Foata normal form. 21913/101952 useless extension candidates. Maximal degree in co-relation 15419. Up to 64116 conditions per place. [2024-10-13 12:10:45,221 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 39 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2024-10-13 12:10:45,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 266 flow [2024-10-13 12:10:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:10:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:10:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2024-10-13 12:10:45,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6947368421052632 [2024-10-13 12:10:45,223 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 218 flow. Second operand 2 states and 132 transitions. [2024-10-13 12:10:45,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 266 flow [2024-10-13 12:10:45,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 260 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:45,227 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 182 flow [2024-10-13 12:10:45,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-10-13 12:10:45,228 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2024-10-13 12:10:45,228 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 182 flow [2024-10-13 12:10:45,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 12:10:45,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:45,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:45,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:10:45,229 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-13 12:10:45,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1579518387, now seen corresponding path program 1 times [2024-10-13 12:10:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5718700] [2024-10-13 12:10:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:45,280 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 12:10:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5718700] [2024-10-13 12:10:45,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5718700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:45,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:45,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297990838] [2024-10-13 12:10:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:45,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:45,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:45,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 95 [2024-10-13 12:10:45,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 12:10:45,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:45,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 95 [2024-10-13 12:10:45,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:51,197 INFO L124 PetriNetUnfolderBase]: 51169/83445 cut-off events. [2024-10-13 12:10:51,197 INFO L125 PetriNetUnfolderBase]: For 3210/3210 co-relation queries the response was YES. [2024-10-13 12:10:51,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149321 conditions, 83445 events. 51169/83445 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 3435. Compared 748570 event pairs, 43302 based on Foata normal form. 0/80039 useless extension candidates. Maximal degree in co-relation 149314. Up to 64115 conditions per place. [2024-10-13 12:10:51,858 INFO L140 encePairwiseOnDemand]: 90/95 looper letters, 38 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2024-10-13 12:10:51,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 252 flow [2024-10-13 12:10:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-10-13 12:10:51,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2024-10-13 12:10:51,859 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 182 flow. Second operand 3 states and 157 transitions. [2024-10-13 12:10:51,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 252 flow [2024-10-13 12:10:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:51,866 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 176 flow [2024-10-13 12:10:51,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-10-13 12:10:51,867 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -8 predicate places. [2024-10-13 12:10:51,867 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 176 flow [2024-10-13 12:10:51,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 12:10:51,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:51,868 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 12:10:51,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 12:10:51,868 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 14 more)] === [2024-10-13 12:10:51,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1579518388, now seen corresponding path program 1 times [2024-10-13 12:10:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218446140] [2024-10-13 12:10:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:51,950 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 12:10:51,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:51,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218446140] [2024-10-13 12:10:51,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218446140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:51,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:51,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:51,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016817334] [2024-10-13 12:10:51,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:51,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:51,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 95 [2024-10-13 12:10:51,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:51,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:51,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 95 [2024-10-13 12:10:51,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand