./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/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/stack_longer-2.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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 18:51:01,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 18:51:01,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 18:51:01,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 18:51:01,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 18:51:01,434 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 18:51:01,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 18:51:01,435 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 18:51:01,437 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 18:51:01,438 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 18:51:01,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 18:51:01,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 18:51:01,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 18:51:01,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 18:51:01,442 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 18:51:01,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 18:51:01,443 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 18:51:01,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 18:51:01,443 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 18:51:01,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 18:51:01,444 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 18:51:01,448 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 18:51:01,448 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 18:51:01,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 18:51:01,449 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 18:51:01,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 18:51:01,449 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 18:51:01,449 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 18:51:01,450 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 18:51:01,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 18:51:01,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 18:51:01,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 18:51:01,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 18:51:01,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:51:01,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 18:51:01,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 18:51:01,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 18:51:01,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 18:51:01,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 18:51:01,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 18:51:01,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 18:51:01,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 18:51:01,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2024-10-24 18:51:01,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 18:51:01,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 18:51:01,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 18:51:01,757 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 18:51:01,759 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 18:51:01,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2024-10-24 18:51:03,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 18:51:03,558 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 18:51:03,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2024-10-24 18:51:03,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba6a4817/6e127106abb54ce79442b57f5837dd01/FLAG53da1295c [2024-10-24 18:51:03,816 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba6a4817/6e127106abb54ce79442b57f5837dd01 [2024-10-24 18:51:03,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 18:51:03,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 18:51:03,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 18:51:03,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 18:51:03,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 18:51:03,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:51:03" (1/1) ... [2024-10-24 18:51:03,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139194a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:03, skipping insertion in model container [2024-10-24 18:51:03,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:51:03" (1/1) ... [2024-10-24 18:51:03,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 18:51:04,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:51:04,354 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 18:51:04,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:51:04,546 INFO L204 MainTranslator]: Completed translation [2024-10-24 18:51:04,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04 WrapperNode [2024-10-24 18:51:04,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 18:51:04,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 18:51:04,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 18:51:04,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 18:51:04,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,639 INFO L138 Inliner]: procedures = 277, calls = 31, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 150 [2024-10-24 18:51:04,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 18:51:04,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 18:51:04,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 18:51:04,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 18:51:04,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,666 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,683 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-10-24 18:51:04,684 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 18:51:04,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 18:51:04,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 18:51:04,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 18:51:04,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (1/1) ... [2024-10-24 18:51:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:51:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:04,793 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) [2024-10-24 18:51:04,796 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 [2024-10-24 18:51:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-24 18:51:04,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-24 18:51:04,860 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 18:51:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 18:51:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 18:51:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 18:51:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 18:51:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 18:51:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 18:51:04,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 18:51:04,863 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 18:51:05,037 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 18:51:05,039 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 18:51:05,297 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 18:51:05,297 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 18:51:05,482 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 18:51:05,484 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 18:51:05,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:51:05 BoogieIcfgContainer [2024-10-24 18:51:05,484 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 18:51:05,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 18:51:05,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 18:51:05,491 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 18:51:05,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:51:03" (1/3) ... [2024-10-24 18:51:05,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbaa8cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:51:05, skipping insertion in model container [2024-10-24 18:51:05,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:04" (2/3) ... [2024-10-24 18:51:05,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbaa8cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:51:05, skipping insertion in model container [2024-10-24 18:51:05,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:51:05" (3/3) ... [2024-10-24 18:51:05,496 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-10-24 18:51:05,513 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 18:51:05,514 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-24 18:51:05,514 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 18:51:05,587 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 18:51:05,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:05,650 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2024-10-24 18:51:05,651 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:05,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 9/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-10-24 18:51:05,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:05,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 51 transitions, 114 flow [2024-10-24 18:51:05,671 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:51:05,682 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;@4f19bfc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:51:05,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-24 18:51:05,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:51:05,696 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-24 18:51:05,696 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:05,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:05,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:05,697 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:05,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1513825994, now seen corresponding path program 1 times [2024-10-24 18:51:05,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:05,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637572350] [2024-10-24 18:51:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:05,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:06,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:06,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637572350] [2024-10-24 18:51:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637572350] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:06,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:06,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:51:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411202461] [2024-10-24 18:51:06,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:06,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:06,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:06,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:06,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:06,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:06,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:06,535 INFO L124 PetriNetUnfolderBase]: 459/863 cut-off events. [2024-10-24 18:51:06,535 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-24 18:51:06,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 863 events. 459/863 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4264 event pairs, 245 based on Foata normal form. 90/827 useless extension candidates. Maximal degree in co-relation 1557. Up to 520 conditions per place. [2024-10-24 18:51:06,548 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-10-24 18:51:06,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-24 18:51:06,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-24 18:51:06,565 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 114 flow. Second operand 4 states and 113 transitions. [2024-10-24 18:51:06,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:06,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:06,573 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:06,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-10-24 18:51:06,581 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-10-24 18:51:06,584 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:06,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:06,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:06,584 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:06,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 18:51:06,585 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:06,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1513825993, now seen corresponding path program 1 times [2024-10-24 18:51:06,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:06,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009291414] [2024-10-24 18:51:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009291414] [2024-10-24 18:51:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009291414] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089562348] [2024-10-24 18:51:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:06,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:51:06,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:51:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:06,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:06,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-10-24 18:51:06,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:06,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:07,232 INFO L124 PetriNetUnfolderBase]: 574/1065 cut-off events. [2024-10-24 18:51:07,233 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-10-24 18:51:07,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1065 events. 574/1065 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5035 event pairs, 179 based on Foata normal form. 9/927 useless extension candidates. Maximal degree in co-relation 695. Up to 755 conditions per place. [2024-10-24 18:51:07,245 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-10-24 18:51:07,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:51:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:51:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-24 18:51:07,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-10-24 18:51:07,250 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 5 states and 143 transitions. [2024-10-24 18:51:07,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:07,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:07,253 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:07,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-10-24 18:51:07,254 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-10-24 18:51:07,255 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:07,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-10-24 18:51:07,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:07,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:07,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 18:51:07,257 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:07,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 428649340, now seen corresponding path program 1 times [2024-10-24 18:51:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:07,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723709419] [2024-10-24 18:51:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:07,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:07,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723709419] [2024-10-24 18:51:07,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723709419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:07,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:07,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 18:51:07,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073438889] [2024-10-24 18:51:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:07,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:07,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:07,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:07,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-10-24 18:51:07,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:07,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:07,671 INFO L124 PetriNetUnfolderBase]: 823/1512 cut-off events. [2024-10-24 18:51:07,672 INFO L125 PetriNetUnfolderBase]: For 255/258 co-relation queries the response was YES. [2024-10-24 18:51:07,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1512 events. 823/1512 cut-off events. For 255/258 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7707 event pairs, 363 based on Foata normal form. 1/1368 useless extension candidates. Maximal degree in co-relation 1126. Up to 857 conditions per place. [2024-10-24 18:51:07,683 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-10-24 18:51:07,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-24 18:51:07,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 18:51:07,685 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-10-24 18:51:07,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:07,691 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:07,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-24 18:51:07,692 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-10-24 18:51:07,692 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:07,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-10-24 18:51:07,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:07,694 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:07,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 18:51:07,694 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:07,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 944670899, now seen corresponding path program 1 times [2024-10-24 18:51:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449116981] [2024-10-24 18:51:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:07,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:07,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449116981] [2024-10-24 18:51:07,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449116981] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:07,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:07,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111278481] [2024-10-24 18:51:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:07,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:07,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:07,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-10-24 18:51:07,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:07,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:07,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:08,005 INFO L124 PetriNetUnfolderBase]: 957/1712 cut-off events. [2024-10-24 18:51:08,007 INFO L125 PetriNetUnfolderBase]: For 518/522 co-relation queries the response was YES. [2024-10-24 18:51:08,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1712 events. 957/1712 cut-off events. For 518/522 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8850 event pairs, 395 based on Foata normal form. 14/1573 useless extension candidates. Maximal degree in co-relation 1265. Up to 1191 conditions per place. [2024-10-24 18:51:08,018 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-24 18:51:08,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:08,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-24 18:51:08,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-24 18:51:08,022 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 159 flow. Second operand 3 states and 103 transitions. [2024-10-24 18:51:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:08,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:08,030 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:08,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-10-24 18:51:08,032 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2024-10-24 18:51:08,032 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:08,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-10-24 18:51:08,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:08,033 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:08,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 18:51:08,033 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:08,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash 551578351, now seen corresponding path program 1 times [2024-10-24 18:51:08,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:08,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263431191] [2024-10-24 18:51:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263431191] [2024-10-24 18:51:08,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263431191] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:08,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:08,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208424012] [2024-10-24 18:51:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:08,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:08,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:08,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:08,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:08,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:08,272 INFO L124 PetriNetUnfolderBase]: 499/1032 cut-off events. [2024-10-24 18:51:08,272 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2024-10-24 18:51:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 1032 events. 499/1032 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4789 event pairs, 105 based on Foata normal form. 60/1020 useless extension candidates. Maximal degree in co-relation 989. Up to 634 conditions per place. [2024-10-24 18:51:08,280 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 45 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-10-24 18:51:08,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-24 18:51:08,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-10-24 18:51:08,282 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 168 flow. Second operand 3 states and 91 transitions. [2024-10-24 18:51:08,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:08,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 292 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:08,287 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:08,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-10-24 18:51:08,289 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-10-24 18:51:08,290 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:08,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:08,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:08,291 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:08,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 18:51:08,291 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:08,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1443641797, now seen corresponding path program 1 times [2024-10-24 18:51:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060963559] [2024-10-24 18:51:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060963559] [2024-10-24 18:51:08,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060963559] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260880916] [2024-10-24 18:51:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:08,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:08,539 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) [2024-10-24 18:51:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 18:51:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:08,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 18:51:08,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:08,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260880916] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:09,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-24 18:51:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546938412] [2024-10-24 18:51:09,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:09,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 18:51:09,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 18:51:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-24 18:51:09,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:09,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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) [2024-10-24 18:51:09,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:09,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:09,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:10,039 INFO L124 PetriNetUnfolderBase]: 1740/3508 cut-off events. [2024-10-24 18:51:10,039 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2024-10-24 18:51:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8219 conditions, 3508 events. 1740/3508 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 19723 event pairs, 262 based on Foata normal form. 54/3327 useless extension candidates. Maximal degree in co-relation 2561. Up to 699 conditions per place. [2024-10-24 18:51:10,063 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 26 changer transitions 0/231 dead transitions. [2024-10-24 18:51:10,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 18:51:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 18:51:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-10-24 18:51:10,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-10-24 18:51:10,066 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 170 flow. Second operand 15 states and 425 transitions. [2024-10-24 18:51:10,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:10,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 231 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:10,072 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:10,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=417, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-10-24 18:51:10,074 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-10-24 18:51:10,075 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:10,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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) [2024-10-24 18:51:10,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:10,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:10,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 18:51:10,276 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,SelfDestructingSolverStorable5 [2024-10-24 18:51:10,277 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:10,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash 193444722, now seen corresponding path program 1 times [2024-10-24 18:51:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656765709] [2024-10-24 18:51:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656765709] [2024-10-24 18:51:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656765709] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 18:51:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887107770] [2024-10-24 18:51:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:10,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:51:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:51:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:10,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:10,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 417 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 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) [2024-10-24 18:51:10,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:10,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:10,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:10,835 INFO L124 PetriNetUnfolderBase]: 1695/3428 cut-off events. [2024-10-24 18:51:10,836 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-10-24 18:51:10,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8806 conditions, 3428 events. 1695/3428 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19780 event pairs, 958 based on Foata normal form. 0/3314 useless extension candidates. Maximal degree in co-relation 7328. Up to 2028 conditions per place. [2024-10-24 18:51:10,864 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 55 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-10-24 18:51:10,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 591 flow [2024-10-24 18:51:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:51:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:51:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-10-24 18:51:10,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-24 18:51:10,866 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 417 flow. Second operand 5 states and 117 transitions. [2024-10-24 18:51:10,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 591 flow [2024-10-24 18:51:10,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 581 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-24 18:51:10,881 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 441 flow [2024-10-24 18:51:10,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-10-24 18:51:10,882 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-10-24 18:51:10,883 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 441 flow [2024-10-24 18:51:10,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 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) [2024-10-24 18:51:10,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:10,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:10,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 18:51:10,883 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:10,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash 193444723, now seen corresponding path program 1 times [2024-10-24 18:51:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:10,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480500332] [2024-10-24 18:51:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:10,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:11,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480500332] [2024-10-24 18:51:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480500332] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:11,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:11,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 18:51:11,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020392592] [2024-10-24 18:51:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:11,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 18:51:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 18:51:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-24 18:51:11,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:11,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-10-24 18:51:11,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:11,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:11,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:11,852 INFO L124 PetriNetUnfolderBase]: 1885/3762 cut-off events. [2024-10-24 18:51:11,853 INFO L125 PetriNetUnfolderBase]: For 3007/3007 co-relation queries the response was YES. [2024-10-24 18:51:11,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10016 conditions, 3762 events. 1885/3762 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21550 event pairs, 514 based on Foata normal form. 0/3616 useless extension candidates. Maximal degree in co-relation 8461. Up to 2781 conditions per place. [2024-10-24 18:51:11,878 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 113 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2024-10-24 18:51:11,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 898 flow [2024-10-24 18:51:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 18:51:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 18:51:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-10-24 18:51:11,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-10-24 18:51:11,880 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 441 flow. Second operand 8 states and 205 transitions. [2024-10-24 18:51:11,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 898 flow [2024-10-24 18:51:11,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 852 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:11,894 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 476 flow [2024-10-24 18:51:11,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-10-24 18:51:11,895 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-10-24 18:51:11,895 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 476 flow [2024-10-24 18:51:11,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-10-24 18:51:11,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:11,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:11,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 18:51:11,896 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:11,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 604666711, now seen corresponding path program 1 times [2024-10-24 18:51:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:11,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317412063] [2024-10-24 18:51:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317412063] [2024-10-24 18:51:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317412063] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:11,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243525823] [2024-10-24 18:51:11,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:11,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:11,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:11,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:11,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:11,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:11,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:12,576 INFO L124 PetriNetUnfolderBase]: 2725/5696 cut-off events. [2024-10-24 18:51:12,576 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-10-24 18:51:12,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14627 conditions, 5696 events. 2725/5696 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 38070 event pairs, 1359 based on Foata normal form. 137/5631 useless extension candidates. Maximal degree in co-relation 12613. Up to 3244 conditions per place. [2024-10-24 18:51:12,615 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 122 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-10-24 18:51:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1114 flow [2024-10-24 18:51:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-24 18:51:12,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-24 18:51:12,617 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 476 flow. Second operand 3 states and 104 transitions. [2024-10-24 18:51:12,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1114 flow [2024-10-24 18:51:12,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 1094 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:12,636 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 477 flow [2024-10-24 18:51:12,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-10-24 18:51:12,637 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-24 18:51:12,638 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 477 flow [2024-10-24 18:51:12,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:12,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:12,639 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:12,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 18:51:12,639 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:12,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1060628401, now seen corresponding path program 1 times [2024-10-24 18:51:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:12,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648066301] [2024-10-24 18:51:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:12,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:13,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:13,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648066301] [2024-10-24 18:51:13,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648066301] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:13,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 18:51:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228955218] [2024-10-24 18:51:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:13,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 18:51:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 18:51:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 18:51:13,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:13,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 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) [2024-10-24 18:51:13,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:14,533 INFO L124 PetriNetUnfolderBase]: 3462/7027 cut-off events. [2024-10-24 18:51:14,533 INFO L125 PetriNetUnfolderBase]: For 5802/5802 co-relation queries the response was YES. [2024-10-24 18:51:14,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19737 conditions, 7027 events. 3462/7027 cut-off events. For 5802/5802 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 44936 event pairs, 786 based on Foata normal form. 0/6807 useless extension candidates. Maximal degree in co-relation 16162. Up to 3938 conditions per place. [2024-10-24 18:51:14,584 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 156 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2024-10-24 18:51:14,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1281 flow [2024-10-24 18:51:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 18:51:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 18:51:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-10-24 18:51:14,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512962962962963 [2024-10-24 18:51:14,587 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 477 flow. Second operand 10 states and 277 transitions. [2024-10-24 18:51:14,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1281 flow [2024-10-24 18:51:14,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 178 transitions, 1271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:14,613 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 521 flow [2024-10-24 18:51:14,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=521, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2024-10-24 18:51:14,614 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2024-10-24 18:51:14,614 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 521 flow [2024-10-24 18:51:14,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 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) [2024-10-24 18:51:14,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:14,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:14,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 18:51:14,618 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:14,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1301296529, now seen corresponding path program 1 times [2024-10-24 18:51:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140664521] [2024-10-24 18:51:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:14,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140664521] [2024-10-24 18:51:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140664521] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794613598] [2024-10-24 18:51:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:14,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:14,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:14,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:14,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 18:51:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:14,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 18:51:14,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:14,839 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 18:51:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794613598] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:14,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 18:51:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-24 18:51:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800961079] [2024-10-24 18:51:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:14,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:14,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:14,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-24 18:51:14,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:14,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:14,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:15,737 INFO L124 PetriNetUnfolderBase]: 3504/7050 cut-off events. [2024-10-24 18:51:15,737 INFO L125 PetriNetUnfolderBase]: For 6713/6713 co-relation queries the response was YES. [2024-10-24 18:51:15,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20237 conditions, 7050 events. 3504/7050 cut-off events. For 6713/6713 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 46039 event pairs, 2843 based on Foata normal form. 19/6839 useless extension candidates. Maximal degree in co-relation 16629. Up to 6094 conditions per place. [2024-10-24 18:51:15,788 INFO L140 encePairwiseOnDemand]: 52/54 looper letters, 69 selfloop transitions, 1 changer transitions 2/82 dead transitions. [2024-10-24 18:51:15,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 82 transitions, 661 flow [2024-10-24 18:51:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-24 18:51:15,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-10-24 18:51:15,790 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 521 flow. Second operand 3 states and 77 transitions. [2024-10-24 18:51:15,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 82 transitions, 661 flow [2024-10-24 18:51:15,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 643 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-24 18:51:15,820 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 498 flow [2024-10-24 18:51:15,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=498, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2024-10-24 18:51:15,821 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2024-10-24 18:51:15,821 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 498 flow [2024-10-24 18:51:15,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-24 18:51:15,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:15,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:15,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 18:51:16,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 18:51:16,023 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:16,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1054932405, now seen corresponding path program 1 times [2024-10-24 18:51:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199551344] [2024-10-24 18:51:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:16,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:16,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199551344] [2024-10-24 18:51:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199551344] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:16,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163370408] [2024-10-24 18:51:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:16,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:16,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:16,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 18:51:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:16,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:16,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:16,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163370408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:17,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:17,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-24 18:51:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309423146] [2024-10-24 18:51:17,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:17,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 18:51:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 18:51:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-24 18:51:17,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:17,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 498 flow. Second operand has 19 states, 19 states have (on average 17.94736842105263) internal successors, (341), 19 states have internal predecessors, (341), 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) [2024-10-24 18:51:17,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:17,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:17,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:20,521 INFO L124 PetriNetUnfolderBase]: 6645/13333 cut-off events. [2024-10-24 18:51:20,521 INFO L125 PetriNetUnfolderBase]: For 13434/13434 co-relation queries the response was YES. [2024-10-24 18:51:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38359 conditions, 13333 events. 6645/13333 cut-off events. For 13434/13434 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 92341 event pairs, 671 based on Foata normal form. 518/13489 useless extension candidates. Maximal degree in co-relation 38324. Up to 2269 conditions per place. [2024-10-24 18:51:20,603 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 432 selfloop transitions, 122 changer transitions 0/562 dead transitions. [2024-10-24 18:51:20,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 562 transitions, 3774 flow [2024-10-24 18:51:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-24 18:51:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-24 18:51:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1089 transitions. [2024-10-24 18:51:20,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-10-24 18:51:20,608 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 498 flow. Second operand 44 states and 1089 transitions. [2024-10-24 18:51:20,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 562 transitions, 3774 flow [2024-10-24 18:51:20,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 562 transitions, 3771 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:20,676 INFO L231 Difference]: Finished difference. Result has 166 places, 176 transitions, 1733 flow [2024-10-24 18:51:20,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1733, PETRI_PLACES=166, PETRI_TRANSITIONS=176} [2024-10-24 18:51:20,678 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-10-24 18:51:20,678 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 176 transitions, 1733 flow [2024-10-24 18:51:20,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.94736842105263) internal successors, (341), 19 states have internal predecessors, (341), 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) [2024-10-24 18:51:20,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:20,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:20,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 18:51:20,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:20,884 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:20,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -957330019, now seen corresponding path program 1 times [2024-10-24 18:51:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574563216] [2024-10-24 18:51:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574563216] [2024-10-24 18:51:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574563216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:21,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:21,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 18:51:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004627924] [2024-10-24 18:51:21,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:21,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 18:51:21,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 18:51:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-24 18:51:21,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:21,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 176 transitions, 1733 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 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) [2024-10-24 18:51:21,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:21,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:21,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:25,374 INFO L124 PetriNetUnfolderBase]: 10095/20048 cut-off events. [2024-10-24 18:51:25,374 INFO L125 PetriNetUnfolderBase]: For 63653/63653 co-relation queries the response was YES. [2024-10-24 18:51:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70183 conditions, 20048 events. 10095/20048 cut-off events. For 63653/63653 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 144015 event pairs, 2233 based on Foata normal form. 0/19649 useless extension candidates. Maximal degree in co-relation 70117. Up to 3829 conditions per place. [2024-10-24 18:51:25,526 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 149 selfloop transitions, 227 changer transitions 0/386 dead transitions. [2024-10-24 18:51:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 386 transitions, 4240 flow [2024-10-24 18:51:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 18:51:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 18:51:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 407 transitions. [2024-10-24 18:51:25,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4433551198257081 [2024-10-24 18:51:25,529 INFO L175 Difference]: Start difference. First operand has 166 places, 176 transitions, 1733 flow. Second operand 17 states and 407 transitions. [2024-10-24 18:51:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 386 transitions, 4240 flow [2024-10-24 18:51:25,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 386 transitions, 3781 flow, removed 227 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:25,920 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3236 flow [2024-10-24 18:51:25,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3236, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-10-24 18:51:25,922 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 136 predicate places. [2024-10-24 18:51:25,922 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3236 flow [2024-10-24 18:51:25,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 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) [2024-10-24 18:51:25,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:25,923 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:25,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 18:51:25,923 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:25,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -194492121, now seen corresponding path program 1 times [2024-10-24 18:51:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:25,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626661159] [2024-10-24 18:51:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:26,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:26,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626661159] [2024-10-24 18:51:26,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626661159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:26,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910177703] [2024-10-24 18:51:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:26,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:26,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:26,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 18:51:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:26,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:26,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:26,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910177703] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:27,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:27,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-10-24 18:51:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286233165] [2024-10-24 18:51:27,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:27,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 18:51:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 18:51:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-10-24 18:51:27,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:27,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3236 flow. Second operand has 20 states, 20 states have (on average 18.85) internal successors, (377), 20 states have internal predecessors, (377), 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) [2024-10-24 18:51:27,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:27,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:27,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:31,862 INFO L124 PetriNetUnfolderBase]: 10283/20115 cut-off events. [2024-10-24 18:51:31,862 INFO L125 PetriNetUnfolderBase]: For 67462/67468 co-relation queries the response was YES. [2024-10-24 18:51:31,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71927 conditions, 20115 events. 10283/20115 cut-off events. For 67462/67468 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 141574 event pairs, 1567 based on Foata normal form. 202/19950 useless extension candidates. Maximal degree in co-relation 71856. Up to 3511 conditions per place. [2024-10-24 18:51:32,040 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 479 selfloop transitions, 201 changer transitions 0/688 dead transitions. [2024-10-24 18:51:32,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 688 transitions, 7510 flow [2024-10-24 18:51:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-24 18:51:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-24 18:51:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 949 transitions. [2024-10-24 18:51:32,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.474974974974975 [2024-10-24 18:51:32,044 INFO L175 Difference]: Start difference. First operand has 185 places, 288 transitions, 3236 flow. Second operand 37 states and 949 transitions. [2024-10-24 18:51:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 688 transitions, 7510 flow [2024-10-24 18:51:32,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 688 transitions, 7071 flow, removed 215 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:32,462 INFO L231 Difference]: Finished difference. Result has 234 places, 328 transitions, 4427 flow [2024-10-24 18:51:32,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4427, PETRI_PLACES=234, PETRI_TRANSITIONS=328} [2024-10-24 18:51:32,463 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 185 predicate places. [2024-10-24 18:51:32,464 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 328 transitions, 4427 flow [2024-10-24 18:51:32,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.85) internal successors, (377), 20 states have internal predecessors, (377), 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) [2024-10-24 18:51:32,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:32,464 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:32,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 18:51:32,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:32,665 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:32,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1005798662, now seen corresponding path program 1 times [2024-10-24 18:51:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183781664] [2024-10-24 18:51:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183781664] [2024-10-24 18:51:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183781664] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342909110] [2024-10-24 18:51:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:32,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:32,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:32,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 18:51:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:32,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 18:51:32,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:32,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342909110] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:33,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-24 18:51:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449123711] [2024-10-24 18:51:33,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:33,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 18:51:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 18:51:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-10-24 18:51:33,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:33,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 328 transitions, 4427 flow. Second operand has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 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) [2024-10-24 18:51:33,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:33,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:42,065 INFO L124 PetriNetUnfolderBase]: 20480/40485 cut-off events. [2024-10-24 18:51:42,065 INFO L125 PetriNetUnfolderBase]: For 245591/245616 co-relation queries the response was YES. [2024-10-24 18:51:42,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159490 conditions, 40485 events. 20480/40485 cut-off events. For 245591/245616 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 307550 event pairs, 6454 based on Foata normal form. 1082/41165 useless extension candidates. Maximal degree in co-relation 159404. Up to 8810 conditions per place. [2024-10-24 18:51:42,523 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 772 selfloop transitions, 193 changer transitions 0/974 dead transitions. [2024-10-24 18:51:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 974 transitions, 14863 flow [2024-10-24 18:51:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 18:51:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 18:51:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 413 transitions. [2024-10-24 18:51:42,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952861952861953 [2024-10-24 18:51:42,525 INFO L175 Difference]: Start difference. First operand has 234 places, 328 transitions, 4427 flow. Second operand 11 states and 413 transitions. [2024-10-24 18:51:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 974 transitions, 14863 flow [2024-10-24 18:51:44,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 974 transitions, 13729 flow, removed 334 selfloop flow, removed 27 redundant places. [2024-10-24 18:51:44,174 INFO L231 Difference]: Finished difference. Result has 226 places, 473 transitions, 6530 flow [2024-10-24 18:51:44,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6530, PETRI_PLACES=226, PETRI_TRANSITIONS=473} [2024-10-24 18:51:44,175 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2024-10-24 18:51:44,175 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 473 transitions, 6530 flow [2024-10-24 18:51:44,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 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) [2024-10-24 18:51:44,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:44,175 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:44,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 18:51:44,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 18:51:44,376 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:44,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash -958137939, now seen corresponding path program 1 times [2024-10-24 18:51:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267720668] [2024-10-24 18:51:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267720668] [2024-10-24 18:51:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267720668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510210623] [2024-10-24 18:51:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:45,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:45,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 18:51:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:45,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-24 18:51:45,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:45,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-10-24 18:51:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 18:51:46,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2024-10-24 18:51:46,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-10-24 18:51:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:46,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:46,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2024-10-24 18:51:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510210623] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:47,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-24 18:51:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480081838] [2024-10-24 18:51:47,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:47,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 18:51:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 18:51:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 18:51:47,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:47,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 473 transitions, 6530 flow. Second operand has 35 states, 35 states have (on average 19.0) internal successors, (665), 35 states have internal predecessors, (665), 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) [2024-10-24 18:51:47,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:47,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:05,100 INFO L124 PetriNetUnfolderBase]: 27686/55172 cut-off events. [2024-10-24 18:52:05,100 INFO L125 PetriNetUnfolderBase]: For 353751/353751 co-relation queries the response was YES. [2024-10-24 18:52:05,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222014 conditions, 55172 events. 27686/55172 cut-off events. For 353751/353751 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 445757 event pairs, 3782 based on Foata normal form. 0/54694 useless extension candidates. Maximal degree in co-relation 221922. Up to 9828 conditions per place. [2024-10-24 18:52:05,888 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 319 selfloop transitions, 607 changer transitions 15/960 dead transitions. [2024-10-24 18:52:05,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 960 transitions, 12740 flow [2024-10-24 18:52:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-24 18:52:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-24 18:52:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1020 transitions. [2024-10-24 18:52:05,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-10-24 18:52:05,892 INFO L175 Difference]: Start difference. First operand has 226 places, 473 transitions, 6530 flow. Second operand 43 states and 1020 transitions. [2024-10-24 18:52:05,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 960 transitions, 12740 flow [2024-10-24 18:52:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 960 transitions, 12592 flow, removed 74 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:09,155 INFO L231 Difference]: Finished difference. Result has 273 places, 682 transitions, 10914 flow [2024-10-24 18:52:09,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6446, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10914, PETRI_PLACES=273, PETRI_TRANSITIONS=682} [2024-10-24 18:52:09,156 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 224 predicate places. [2024-10-24 18:52:09,156 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 682 transitions, 10914 flow [2024-10-24 18:52:09,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 19.0) internal successors, (665), 35 states have internal predecessors, (665), 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) [2024-10-24 18:52:09,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:09,157 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2024-10-24 18:52:09,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 18:52:09,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 18:52:09,357 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:52:09,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1471978053, now seen corresponding path program 2 times [2024-10-24 18:52:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:09,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899750093] [2024-10-24 18:52:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899750093] [2024-10-24 18:52:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899750093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:52:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103139809] [2024-10-24 18:52:09,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 18:52:09,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:52:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:52:09,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:52:09,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 18:52:10,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 18:52:10,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 18:52:10,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 18:52:10,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:52:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:10,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:52:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:10,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103139809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:52:10,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:52:10,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2024-10-24 18:52:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385540692] [2024-10-24 18:52:10,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:52:10,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 18:52:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 18:52:10,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-10-24 18:52:11,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:52:11,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 682 transitions, 10914 flow. Second operand has 27 states, 27 states have (on average 19.22222222222222) internal successors, (519), 27 states have internal predecessors, (519), 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) [2024-10-24 18:52:11,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:11,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:52:11,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand