./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:21:57,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:21:57,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:21:57,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:21:57,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:21:57,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:21:57,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:21:57,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:21:57,864 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:21:57,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:21:57,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:21:57,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:21:57,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:21:57,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:21:57,867 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:21:57,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:21:57,867 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:21:57,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:21:57,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:21:57,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:21:57,869 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:21:57,870 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:21:57,870 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:21:57,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:21:57,873 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:21:57,873 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:21:57,873 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:21:57,874 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:21:57,874 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:21:57,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:21:57,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:21:57,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:21:57,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:21:57,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:21:57,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:21:57,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:21:57,879 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:21:57,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:21:57,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:21:57,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:21:57,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:21:57,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:21:57,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-11-12 16:21:58,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:21:58,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:21:58,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:21:58,164 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:21:58,164 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:21:58,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-12 16:21:59,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:21:59,696 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:21:59,697 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-12 16:21:59,705 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccf6d314/7336898eeee8449ca4986074bbdac017/FLAG15074d877 [2024-11-12 16:21:59,719 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccf6d314/7336898eeee8449ca4986074bbdac017 [2024-11-12 16:21:59,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:21:59,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:21:59,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:21:59,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:21:59,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:21:59,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:21:59,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601ea62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59, skipping insertion in model container [2024-11-12 16:21:59,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:21:59,754 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:21:59,944 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:21:59,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:21:59,956 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:21:59,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:21:59,996 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:21:59,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59 WrapperNode [2024-11-12 16:21:59,997 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:21:59,998 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:21:59,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:21:59,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:22:00,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,043 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 195 [2024-11-12 16:22:00,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:22:00,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:22:00,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:22:00,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:22:00,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,063 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,080 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:22:00,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:22:00,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:22:00,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:22:00,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:22:00,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (1/1) ... [2024-11-12 16:22:00,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:22:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:00,138 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) [2024-11-12 16:22:00,141 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 [2024-11-12 16:22:00,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:22:00,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:22:00,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:22:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:22:00,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:22:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:22:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:22:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:22:00,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:22:00,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:22:00,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:22:00,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:22:00,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:22:00,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:22:00,195 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:22:00,368 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:22:00,371 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:22:00,823 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:22:00,823 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:22:01,078 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:22:01,079 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 16:22:01,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:22:01 BoogieIcfgContainer [2024-11-12 16:22:01,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:22:01,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:22:01,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:22:01,086 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:22:01,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:21:59" (1/3) ... [2024-11-12 16:22:01,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d51b08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:22:01, skipping insertion in model container [2024-11-12 16:22:01,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:59" (2/3) ... [2024-11-12 16:22:01,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d51b08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:22:01, skipping insertion in model container [2024-11-12 16:22:01,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:22:01" (3/3) ... [2024-11-12 16:22:01,090 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-11-12 16:22:01,107 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:22:01,107 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-12 16:22:01,107 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:22:01,181 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:22:01,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-11-12 16:22:01,249 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-11-12 16:22:01,250 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:22:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-12 16:22:01,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-11-12 16:22:01,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-11-12 16:22:01,266 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:22:01,274 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;@7793ae66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:22:01,274 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-12 16:22:01,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:22:01,278 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:22:01,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:22:01,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:01,279 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:22:01,280 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:01,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 649140, now seen corresponding path program 1 times [2024-11-12 16:22:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:01,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908258099] [2024-11-12 16:22:01,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908258099] [2024-11-12 16:22:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908258099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:01,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:01,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:22:01,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463054110] [2024-11-12 16:22:01,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:01,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:22:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:22:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:22:01,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-12 16:22:01,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-12 16:22:01,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:01,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-12 16:22:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:01,880 INFO L124 PetriNetUnfolderBase]: 116/263 cut-off events. [2024-11-12 16:22:01,880 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-12 16:22:01,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 263 events. 116/263 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1130 event pairs, 68 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 416. Up to 183 conditions per place. [2024-11-12 16:22:01,887 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-11-12 16:22:01,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-11-12 16:22:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:22:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:22:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-11-12 16:22:01,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-12 16:22:01,907 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-11-12 16:22:01,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-11-12 16:22:01,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:01,914 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-11-12 16:22:01,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-11-12 16:22:01,922 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-11-12 16:22:01,923 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-11-12 16:22:01,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-11-12 16:22:01,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:01,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:22:01,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:22:01,924 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:01,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 649141, now seen corresponding path program 1 times [2024-11-12 16:22:01,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:01,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737074920] [2024-11-12 16:22:01,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737074920] [2024-11-12 16:22:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737074920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:02,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:22:02,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249437333] [2024-11-12 16:22:02,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:02,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:22:02,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-12 16:22:02,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:22:02,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:02,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-12 16:22:02,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:02,459 INFO L124 PetriNetUnfolderBase]: 117/266 cut-off events. [2024-11-12 16:22:02,461 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:22:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 266 events. 117/266 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1129 event pairs, 68 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 441. Up to 192 conditions per place. [2024-11-12 16:22:02,465 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 27 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-11-12 16:22:02,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 182 flow [2024-11-12 16:22:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:22:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:22:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-12 16:22:02,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-12 16:22:02,470 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-12 16:22:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 182 flow [2024-11-12 16:22:02,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:02,474 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 137 flow [2024-11-12 16:22:02,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-11-12 16:22:02,475 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-12 16:22:02,475 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 137 flow [2024-11-12 16:22:02,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-12 16:22:02,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:02,475 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:22:02,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:22:02,476 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:02,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash 20125317, now seen corresponding path program 1 times [2024-11-12 16:22:02,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:02,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687494834] [2024-11-12 16:22:02,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687494834] [2024-11-12 16:22:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687494834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:02,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:02,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429012902] [2024-11-12 16:22:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:02,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:02,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:02,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-12 16:22:02,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2024-11-12 16:22:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:02,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-12 16:22:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:03,129 INFO L124 PetriNetUnfolderBase]: 118/269 cut-off events. [2024-11-12 16:22:03,130 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:22:03,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 269 events. 118/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1155 event pairs, 68 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 462. Up to 191 conditions per place. [2024-11-12 16:22:03,132 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-11-12 16:22:03,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 211 flow [2024-11-12 16:22:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-12 16:22:03,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-12 16:22:03,139 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 137 flow. Second operand 5 states and 185 transitions. [2024-11-12 16:22:03,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 211 flow [2024-11-12 16:22:03,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:03,141 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 171 flow [2024-11-12 16:22:03,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-12 16:22:03,143 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-11-12 16:22:03,144 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 171 flow [2024-11-12 16:22:03,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2024-11-12 16:22:03,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:03,145 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:22:03,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:22:03,145 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:03,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 623845148, now seen corresponding path program 1 times [2024-11-12 16:22:03,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:03,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237104862] [2024-11-12 16:22:03,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:03,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:03,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237104862] [2024-11-12 16:22:03,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237104862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:03,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398171052] [2024-11-12 16:22:03,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:03,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:03,419 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) [2024-11-12 16:22:03,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:22:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:03,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:22:03,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:03,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-12 16:22:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:03,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398171052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:03,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:03,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:22:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488171175] [2024-11-12 16:22:03,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:03,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:22:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:22:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:22:04,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-12 16:22:04,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 171 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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) [2024-11-12 16:22:04,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:04,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-12 16:22:04,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:04,590 INFO L124 PetriNetUnfolderBase]: 118/268 cut-off events. [2024-11-12 16:22:04,591 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:22:04,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 268 events. 118/268 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1142 event pairs, 68 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 472. Up to 191 conditions per place. [2024-11-12 16:22:04,595 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 26 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-12 16:22:04,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 233 flow [2024-11-12 16:22:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-12 16:22:04,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-11-12 16:22:04,602 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 171 flow. Second operand 6 states and 211 transitions. [2024-11-12 16:22:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 233 flow [2024-11-12 16:22:04,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:04,604 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 180 flow [2024-11-12 16:22:04,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-11-12 16:22:04,606 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2024-11-12 16:22:04,607 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 180 flow [2024-11-12 16:22:04,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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) [2024-11-12 16:22:04,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:04,608 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:22:04,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:22:04,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:04,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:04,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2134385646, now seen corresponding path program 1 times [2024-11-12 16:22:04,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:04,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139243693] [2024-11-12 16:22:04,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:04,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139243693] [2024-11-12 16:22:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139243693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708231615] [2024-11-12 16:22:04,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:04,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:04,980 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) [2024-11-12 16:22:04,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:22:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:05,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:22:05,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:05,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-12 16:22:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:05,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:05,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708231615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:05,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:05,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:22:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410314742] [2024-11-12 16:22:05,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:05,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:22:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:22:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:22:05,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-12 16:22:05,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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) [2024-11-12 16:22:05,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:05,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-12 16:22:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:06,222 INFO L124 PetriNetUnfolderBase]: 120/273 cut-off events. [2024-11-12 16:22:06,222 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:22:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 273 events. 120/273 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1167 event pairs, 68 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 480. Up to 184 conditions per place. [2024-11-12 16:22:06,228 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 20 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-11-12 16:22:06,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 285 flow [2024-11-12 16:22:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 310 transitions. [2024-11-12 16:22:06,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-12 16:22:06,230 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 180 flow. Second operand 9 states and 310 transitions. [2024-11-12 16:22:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 285 flow [2024-11-12 16:22:06,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 238 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-12 16:22:06,234 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 198 flow [2024-11-12 16:22:06,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=198, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-11-12 16:22:06,235 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-11-12 16:22:06,237 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 198 flow [2024-11-12 16:22:06,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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) [2024-11-12 16:22:06,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:06,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:06,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:06,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:06,442 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:06,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1738298369, now seen corresponding path program 1 times [2024-11-12 16:22:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247655859] [2024-11-12 16:22:06,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247655859] [2024-11-12 16:22:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247655859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:06,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:22:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379501310] [2024-11-12 16:22:06,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:06,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:06,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:06,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:06,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:06,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:06,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:06,679 INFO L124 PetriNetUnfolderBase]: 212/474 cut-off events. [2024-11-12 16:22:06,680 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:22:06,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 474 events. 212/474 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2403 event pairs, 87 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 550. Up to 229 conditions per place. [2024-11-12 16:22:06,683 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 67 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2024-11-12 16:22:06,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 455 flow [2024-11-12 16:22:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2024-11-12 16:22:06,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-12 16:22:06,685 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 198 flow. Second operand 6 states and 248 transitions. [2024-11-12 16:22:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 455 flow [2024-11-12 16:22:06,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 402 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:06,688 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 202 flow [2024-11-12 16:22:06,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-11-12 16:22:06,688 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2024-11-12 16:22:06,689 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 202 flow [2024-11-12 16:22:06,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:06,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:06,689 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:06,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:22:06,690 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:06,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1346316314, now seen corresponding path program 1 times [2024-11-12 16:22:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:06,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754672437] [2024-11-12 16:22:06,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:22:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754672437] [2024-11-12 16:22:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754672437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:06,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:22:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971972655] [2024-11-12 16:22:06,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:06,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:06,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:06,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:06,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:06,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:06,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:06,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:06,929 INFO L124 PetriNetUnfolderBase]: 352/830 cut-off events. [2024-11-12 16:22:06,930 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-12 16:22:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 830 events. 352/830 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4990 event pairs, 144 based on Foata normal form. 12/619 useless extension candidates. Maximal degree in co-relation 921. Up to 360 conditions per place. [2024-11-12 16:22:06,936 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 59 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-12 16:22:06,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 401 flow [2024-11-12 16:22:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-11-12 16:22:06,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-11-12 16:22:06,938 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 202 flow. Second operand 5 states and 211 transitions. [2024-11-12 16:22:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 401 flow [2024-11-12 16:22:06,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:06,942 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 237 flow [2024-11-12 16:22:06,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-11-12 16:22:06,943 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-11-12 16:22:06,943 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 237 flow [2024-11-12 16:22:06,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:06,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:06,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:06,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:22:06,944 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:06,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 230400802, now seen corresponding path program 1 times [2024-11-12 16:22:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:06,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286305854] [2024-11-12 16:22:06,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:06,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:07,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:07,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286305854] [2024-11-12 16:22:07,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286305854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:07,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:07,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:22:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394383542] [2024-11-12 16:22:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:07,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:07,059 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:07,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:07,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:07,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:07,191 INFO L124 PetriNetUnfolderBase]: 304/798 cut-off events. [2024-11-12 16:22:07,192 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-12 16:22:07,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 798 events. 304/798 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4895 event pairs, 164 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 995. Up to 373 conditions per place. [2024-11-12 16:22:07,196 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 63 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-11-12 16:22:07,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 458 flow [2024-11-12 16:22:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 241 transitions. [2024-11-12 16:22:07,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-11-12 16:22:07,198 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 237 flow. Second operand 6 states and 241 transitions. [2024-11-12 16:22:07,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 458 flow [2024-11-12 16:22:07,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:07,201 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 254 flow [2024-11-12 16:22:07,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-11-12 16:22:07,201 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-11-12 16:22:07,201 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 254 flow [2024-11-12 16:22:07,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:07,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:07,202 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:07,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:22:07,202 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:07,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash 249474425, now seen corresponding path program 1 times [2024-11-12 16:22:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:07,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546034557] [2024-11-12 16:22:07,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:22:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:07,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546034557] [2024-11-12 16:22:07,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546034557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:07,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:07,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292770227] [2024-11-12 16:22:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:07,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:07,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-12 16:22:07,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-12 16:22:07,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:07,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-12 16:22:07,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:07,493 INFO L124 PetriNetUnfolderBase]: 348/868 cut-off events. [2024-11-12 16:22:07,493 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-11-12 16:22:07,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 868 events. 348/868 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5240 event pairs, 266 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 1275. Up to 610 conditions per place. [2024-11-12 16:22:07,499 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 39 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-11-12 16:22:07,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 340 flow [2024-11-12 16:22:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-12 16:22:07,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-12 16:22:07,501 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 254 flow. Second operand 5 states and 148 transitions. [2024-11-12 16:22:07,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 340 flow [2024-11-12 16:22:07,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 65 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:07,504 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 254 flow [2024-11-12 16:22:07,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-11-12 16:22:07,505 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-11-12 16:22:07,505 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 254 flow [2024-11-12 16:22:07,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-12 16:22:07,506 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:07,506 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:07,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:22:07,506 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:07,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 249474426, now seen corresponding path program 1 times [2024-11-12 16:22:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815732257] [2024-11-12 16:22:07,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:07,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:07,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815732257] [2024-11-12 16:22:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815732257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:07,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225830546] [2024-11-12 16:22:07,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:07,744 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) [2024-11-12 16:22:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:22:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:22:07,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:07,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:07,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:07,895 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:07,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:07,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:08,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2024-11-12 16:22:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:08,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225830546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:08,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:22:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282480054] [2024-11-12 16:22:08,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:08,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:22:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:22:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:22:08,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-12 16:22:08,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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) [2024-11-12 16:22:08,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:08,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-12 16:22:08,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:09,286 INFO L124 PetriNetUnfolderBase]: 496/1099 cut-off events. [2024-11-12 16:22:09,286 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-11-12 16:22:09,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 1099 events. 496/1099 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6295 event pairs, 163 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1464. Up to 317 conditions per place. [2024-11-12 16:22:09,292 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 80 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-12 16:22:09,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 578 flow [2024-11-12 16:22:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 323 transitions. [2024-11-12 16:22:09,294 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5981481481481481 [2024-11-12 16:22:09,294 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 254 flow. Second operand 9 states and 323 transitions. [2024-11-12 16:22:09,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 578 flow [2024-11-12 16:22:09,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 564 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:09,298 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 303 flow [2024-11-12 16:22:09,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=303, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-11-12 16:22:09,301 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-11-12 16:22:09,301 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 303 flow [2024-11-12 16:22:09,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 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) [2024-11-12 16:22:09,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:09,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:09,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:22:09,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:09,502 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:09,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1031966391, now seen corresponding path program 1 times [2024-11-12 16:22:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:09,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258880781] [2024-11-12 16:22:09,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:09,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258880781] [2024-11-12 16:22:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258880781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:22:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078393958] [2024-11-12 16:22:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:09,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:09,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:09,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-11-12 16:22:09,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:09,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:09,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:09,730 INFO L124 PetriNetUnfolderBase]: 410/1020 cut-off events. [2024-11-12 16:22:09,730 INFO L125 PetriNetUnfolderBase]: For 654/656 co-relation queries the response was YES. [2024-11-12 16:22:09,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 1020 events. 410/1020 cut-off events. For 654/656 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5913 event pairs, 260 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 1395. Up to 566 conditions per place. [2024-11-12 16:22:09,737 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 58 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-12 16:22:09,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 504 flow [2024-11-12 16:22:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-11-12 16:22:09,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-12 16:22:09,738 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 303 flow. Second operand 5 states and 204 transitions. [2024-11-12 16:22:09,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 504 flow [2024-11-12 16:22:09,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 471 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:09,742 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 313 flow [2024-11-12 16:22:09,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-11-12 16:22:09,743 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-11-12 16:22:09,743 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 313 flow [2024-11-12 16:22:09,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-11-12 16:22:09,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:09,743 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:09,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:22:09,744 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:09,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash -856226789, now seen corresponding path program 1 times [2024-11-12 16:22:09,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066911332] [2024-11-12 16:22:09,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:09,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066911332] [2024-11-12 16:22:09,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066911332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:09,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:09,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603142475] [2024-11-12 16:22:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:09,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:22:09,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-12 16:22:09,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-11-12 16:22:09,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:09,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-12 16:22:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:09,964 INFO L124 PetriNetUnfolderBase]: 498/1105 cut-off events. [2024-11-12 16:22:09,965 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-11-12 16:22:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2520 conditions, 1105 events. 498/1105 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6045 event pairs, 402 based on Foata normal form. 0/1053 useless extension candidates. Maximal degree in co-relation 1693. Up to 871 conditions per place. [2024-11-12 16:22:09,971 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 45 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-12 16:22:09,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 409 flow [2024-11-12 16:22:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:22:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:22:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-12 16:22:09,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-12 16:22:09,973 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 313 flow. Second operand 4 states and 125 transitions. [2024-11-12 16:22:09,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 409 flow [2024-11-12 16:22:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:09,976 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 307 flow [2024-11-12 16:22:09,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:22:09,977 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2024-11-12 16:22:09,977 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 307 flow [2024-11-12 16:22:09,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-11-12 16:22:09,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:09,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:09,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:22:09,978 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:09,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash -856226788, now seen corresponding path program 1 times [2024-11-12 16:22:09,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:09,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717859553] [2024-11-12 16:22:09,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:10,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:10,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717859553] [2024-11-12 16:22:10,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717859553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:10,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636711099] [2024-11-12 16:22:10,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:10,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:10,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:10,146 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) [2024-11-12 16:22:10,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:22:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:10,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:22:10,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:10,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:10,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2024-11-12 16:22:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636711099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:10,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:22:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791736976] [2024-11-12 16:22:10,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:10,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:22:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:22:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:22:10,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-12 16:22:10,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 30.727272727272727) internal successors, (338), 11 states have internal predecessors, (338), 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) [2024-11-12 16:22:10,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:10,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-12 16:22:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:11,023 INFO L124 PetriNetUnfolderBase]: 429/895 cut-off events. [2024-11-12 16:22:11,023 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2024-11-12 16:22:11,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 895 events. 429/895 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4531 event pairs, 155 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1422. Up to 255 conditions per place. [2024-11-12 16:22:11,029 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 76 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-11-12 16:22:11,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 599 flow [2024-11-12 16:22:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2024-11-12 16:22:11,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-12 16:22:11,031 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 307 flow. Second operand 7 states and 284 transitions. [2024-11-12 16:22:11,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 599 flow [2024-11-12 16:22:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 591 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:22:11,034 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 349 flow [2024-11-12 16:22:11,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-11-12 16:22:11,035 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-11-12 16:22:11,035 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 349 flow [2024-11-12 16:22:11,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.727272727272727) internal successors, (338), 11 states have internal predecessors, (338), 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) [2024-11-12 16:22:11,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:11,036 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:11,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:22:11,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:11,241 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:11,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -780390884, now seen corresponding path program 1 times [2024-11-12 16:22:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470643133] [2024-11-12 16:22:11,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:11,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:11,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470643133] [2024-11-12 16:22:11,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470643133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:11,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450689710] [2024-11-12 16:22:11,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:11,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:11,452 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) [2024-11-12 16:22:11,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:22:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:11,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:22:11,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:11,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:11,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:11,596 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:11,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:11,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:11,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2024-11-12 16:22:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450689710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:11,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:22:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417918403] [2024-11-12 16:22:11,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:11,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:22:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:22:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:22:12,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-12 16:22:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 349 flow. Second operand has 13 states, 13 states have (on average 29.307692307692307) internal successors, (381), 13 states have internal predecessors, (381), 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) [2024-11-12 16:22:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-12 16:22:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:12,892 INFO L124 PetriNetUnfolderBase]: 714/1563 cut-off events. [2024-11-12 16:22:12,892 INFO L125 PetriNetUnfolderBase]: For 1789/1849 co-relation queries the response was YES. [2024-11-12 16:22:12,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3658 conditions, 1563 events. 714/1563 cut-off events. For 1789/1849 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9237 event pairs, 259 based on Foata normal form. 0/1372 useless extension candidates. Maximal degree in co-relation 2774. Up to 408 conditions per place. [2024-11-12 16:22:12,900 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 80 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-11-12 16:22:12,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 707 flow [2024-11-12 16:22:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 326 transitions. [2024-11-12 16:22:12,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-11-12 16:22:12,902 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 349 flow. Second operand 9 states and 326 transitions. [2024-11-12 16:22:12,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 707 flow [2024-11-12 16:22:12,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 670 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:12,906 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 370 flow [2024-11-12 16:22:12,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-11-12 16:22:12,907 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 27 predicate places. [2024-11-12 16:22:12,907 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 370 flow [2024-11-12 16:22:12,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.307692307692307) internal successors, (381), 13 states have internal predecessors, (381), 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) [2024-11-12 16:22:12,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:12,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:12,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:22:13,108 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,SelfDestructingSolverStorable13 [2024-11-12 16:22:13,108 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:13,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1577686988, now seen corresponding path program 1 times [2024-11-12 16:22:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875376088] [2024-11-12 16:22:13,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875376088] [2024-11-12 16:22:13,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875376088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080300441] [2024-11-12 16:22:13,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:13,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:13,283 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) [2024-11-12 16:22:13,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:22:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:13,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:22:13,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:13,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:13,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2024-11-12 16:22:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:13,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080300441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:13,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:13,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:22:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223842337] [2024-11-12 16:22:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:13,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:22:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:22:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:22:13,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:22:13,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 370 flow. Second operand has 11 states, 11 states have (on average 30.09090909090909) internal successors, (331), 11 states have internal predecessors, (331), 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) [2024-11-12 16:22:13,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:13,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:22:13,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:14,280 INFO L124 PetriNetUnfolderBase]: 790/1548 cut-off events. [2024-11-12 16:22:14,281 INFO L125 PetriNetUnfolderBase]: For 1966/2044 co-relation queries the response was YES. [2024-11-12 16:22:14,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 1548 events. 790/1548 cut-off events. For 1966/2044 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8369 event pairs, 259 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 3096. Up to 471 conditions per place. [2024-11-12 16:22:14,291 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 77 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-11-12 16:22:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 695 flow [2024-11-12 16:22:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 275 transitions. [2024-11-12 16:22:14,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-12 16:22:14,293 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 370 flow. Second operand 7 states and 275 transitions. [2024-11-12 16:22:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 695 flow [2024-11-12 16:22:14,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 666 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:14,299 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 391 flow [2024-11-12 16:22:14,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2024-11-12 16:22:14,301 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 28 predicate places. [2024-11-12 16:22:14,301 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 391 flow [2024-11-12 16:22:14,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.09090909090909) internal successors, (331), 11 states have internal predecessors, (331), 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) [2024-11-12 16:22:14,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:14,302 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:14,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:14,502 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,SelfDestructingSolverStorable14 [2024-11-12 16:22:14,503 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:14,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -40872896, now seen corresponding path program 1 times [2024-11-12 16:22:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:14,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608526274] [2024-11-12 16:22:14,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608526274] [2024-11-12 16:22:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608526274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788308584] [2024-11-12 16:22:14,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:14,611 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) [2024-11-12 16:22:14,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:22:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:14,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:22:14,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:14,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788308584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:14,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:14,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-12 16:22:14,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262172020] [2024-11-12 16:22:14,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:14,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:22:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:22:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:22:15,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:15,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 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) [2024-11-12 16:22:15,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:15,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:15,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:15,691 INFO L124 PetriNetUnfolderBase]: 1830/3790 cut-off events. [2024-11-12 16:22:15,691 INFO L125 PetriNetUnfolderBase]: For 5917/6070 co-relation queries the response was YES. [2024-11-12 16:22:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 3790 events. 1830/3790 cut-off events. For 5917/6070 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 27109 event pairs, 481 based on Foata normal form. 72/3768 useless extension candidates. Maximal degree in co-relation 3946. Up to 911 conditions per place. [2024-11-12 16:22:15,713 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 173 selfloop transitions, 35 changer transitions 0/224 dead transitions. [2024-11-12 16:22:15,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 224 transitions, 1553 flow [2024-11-12 16:22:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 16:22:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-12 16:22:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 833 transitions. [2024-11-12 16:22:15,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-12 16:22:15,716 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 391 flow. Second operand 21 states and 833 transitions. [2024-11-12 16:22:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 224 transitions, 1553 flow [2024-11-12 16:22:15,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 224 transitions, 1479 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:15,727 INFO L231 Difference]: Finished difference. Result has 107 places, 84 transitions, 603 flow [2024-11-12 16:22:15,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=603, PETRI_PLACES=107, PETRI_TRANSITIONS=84} [2024-11-12 16:22:15,728 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2024-11-12 16:22:15,728 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 84 transitions, 603 flow [2024-11-12 16:22:15,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 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) [2024-11-12 16:22:15,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:15,728 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:15,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:22:15,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:15,929 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:15,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1046554722, now seen corresponding path program 1 times [2024-11-12 16:22:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665197653] [2024-11-12 16:22:15,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:16,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:16,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665197653] [2024-11-12 16:22:16,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665197653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:16,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264128404] [2024-11-12 16:22:16,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:16,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:16,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:16,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:22:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:16,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:22:16,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:16,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264128404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:16,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:16,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-12 16:22:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484116007] [2024-11-12 16:22:16,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:16,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:22:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:22:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:22:16,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:16,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 84 transitions, 603 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 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) [2024-11-12 16:22:16,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:16,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:16,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:17,093 INFO L124 PetriNetUnfolderBase]: 1511/3115 cut-off events. [2024-11-12 16:22:17,093 INFO L125 PetriNetUnfolderBase]: For 6486/6697 co-relation queries the response was YES. [2024-11-12 16:22:17,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8529 conditions, 3115 events. 1511/3115 cut-off events. For 6486/6697 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20804 event pairs, 546 based on Foata normal form. 54/3118 useless extension candidates. Maximal degree in co-relation 8481. Up to 915 conditions per place. [2024-11-12 16:22:17,110 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 154 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2024-11-12 16:22:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 207 transitions, 1513 flow [2024-11-12 16:22:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 16:22:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 16:22:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 889 transitions. [2024-11-12 16:22:17,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6442028985507247 [2024-11-12 16:22:17,112 INFO L175 Difference]: Start difference. First operand has 107 places, 84 transitions, 603 flow. Second operand 23 states and 889 transitions. [2024-11-12 16:22:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 207 transitions, 1513 flow [2024-11-12 16:22:17,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 207 transitions, 1510 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:17,122 INFO L231 Difference]: Finished difference. Result has 132 places, 93 transitions, 776 flow [2024-11-12 16:22:17,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=776, PETRI_PLACES=132, PETRI_TRANSITIONS=93} [2024-11-12 16:22:17,123 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2024-11-12 16:22:17,123 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 93 transitions, 776 flow [2024-11-12 16:22:17,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 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) [2024-11-12 16:22:17,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:17,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:17,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:22:17,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:22:17,328 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:17,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2057850876, now seen corresponding path program 1 times [2024-11-12 16:22:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469625805] [2024-11-12 16:22:17,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469625805] [2024-11-12 16:22:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469625805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:17,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:17,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:22:17,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132377737] [2024-11-12 16:22:17,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:17,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:22:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:22:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:22:17,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-12 16:22:17,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 93 transitions, 776 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-11-12 16:22:17,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:17,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-12 16:22:17,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:17,875 INFO L124 PetriNetUnfolderBase]: 1357/3009 cut-off events. [2024-11-12 16:22:17,876 INFO L125 PetriNetUnfolderBase]: For 8241/8429 co-relation queries the response was YES. [2024-11-12 16:22:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8672 conditions, 3009 events. 1357/3009 cut-off events. For 8241/8429 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 20896 event pairs, 606 based on Foata normal form. 1/2960 useless extension candidates. Maximal degree in co-relation 8613. Up to 2283 conditions per place. [2024-11-12 16:22:17,890 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 72 selfloop transitions, 20 changer transitions 13/122 dead transitions. [2024-11-12 16:22:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 122 transitions, 1201 flow [2024-11-12 16:22:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:22:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:22:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-11-12 16:22:17,892 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-11-12 16:22:17,892 INFO L175 Difference]: Start difference. First operand has 132 places, 93 transitions, 776 flow. Second operand 6 states and 242 transitions. [2024-11-12 16:22:17,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 122 transitions, 1201 flow [2024-11-12 16:22:17,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 122 transitions, 1145 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-11-12 16:22:17,903 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 962 flow [2024-11-12 16:22:17,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=962, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2024-11-12 16:22:17,905 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2024-11-12 16:22:17,905 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 962 flow [2024-11-12 16:22:17,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-11-12 16:22:17,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:17,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:17,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:22:17,906 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:17,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1090212515, now seen corresponding path program 1 times [2024-11-12 16:22:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:17,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178501684] [2024-11-12 16:22:17,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178501684] [2024-11-12 16:22:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178501684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257778435] [2024-11-12 16:22:18,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:18,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:18,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:22:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:18,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-12 16:22:18,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:18,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257778435] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:18,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:18,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2024-11-12 16:22:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528077836] [2024-11-12 16:22:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:18,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:22:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:22:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:22:18,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-12 16:22:18,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 962 flow. Second operand has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 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) [2024-11-12 16:22:18,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-12 16:22:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:18,612 INFO L124 PetriNetUnfolderBase]: 1349/2967 cut-off events. [2024-11-12 16:22:18,613 INFO L125 PetriNetUnfolderBase]: For 9204/9414 co-relation queries the response was YES. [2024-11-12 16:22:18,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8778 conditions, 2967 events. 1349/2967 cut-off events. For 9204/9414 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20593 event pairs, 953 based on Foata normal form. 2/2908 useless extension candidates. Maximal degree in co-relation 8651. Up to 1975 conditions per place. [2024-11-12 16:22:18,630 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 83 selfloop transitions, 30 changer transitions 13/143 dead transitions. [2024-11-12 16:22:18,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 143 transitions, 1314 flow [2024-11-12 16:22:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-12 16:22:18,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6685185185185185 [2024-11-12 16:22:18,632 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 962 flow. Second operand 9 states and 361 transitions. [2024-11-12 16:22:18,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 143 transitions, 1314 flow [2024-11-12 16:22:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 143 transitions, 1286 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:18,645 INFO L231 Difference]: Finished difference. Result has 131 places, 105 transitions, 965 flow [2024-11-12 16:22:18,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=965, PETRI_PLACES=131, PETRI_TRANSITIONS=105} [2024-11-12 16:22:18,645 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 73 predicate places. [2024-11-12 16:22:18,645 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 105 transitions, 965 flow [2024-11-12 16:22:18,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 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) [2024-11-12 16:22:18,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:18,647 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:18,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:22:18,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:18,852 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:18,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1526114109, now seen corresponding path program 1 times [2024-11-12 16:22:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:18,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316731272] [2024-11-12 16:22:18,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:18,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316731272] [2024-11-12 16:22:18,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316731272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:18,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141035829] [2024-11-12 16:22:18,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:18,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:18,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:18,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:22:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:19,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:22:19,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:19,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141035829] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:19,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:19,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-12 16:22:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246253779] [2024-11-12 16:22:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:19,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:22:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:22:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:22:19,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-12 16:22:19,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 105 transitions, 965 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2024-11-12 16:22:19,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:19,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-12 16:22:19,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:19,616 INFO L124 PetriNetUnfolderBase]: 1317/2921 cut-off events. [2024-11-12 16:22:19,617 INFO L125 PetriNetUnfolderBase]: For 8759/8947 co-relation queries the response was YES. [2024-11-12 16:22:19,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 2921 events. 1317/2921 cut-off events. For 8759/8947 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20618 event pairs, 933 based on Foata normal form. 2/2859 useless extension candidates. Maximal degree in co-relation 8442. Up to 2098 conditions per place. [2024-11-12 16:22:19,633 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 71 selfloop transitions, 27 changer transitions 13/128 dead transitions. [2024-11-12 16:22:19,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 128 transitions, 1242 flow [2024-11-12 16:22:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:22:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:22:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 315 transitions. [2024-11-12 16:22:19,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-12 16:22:19,635 INFO L175 Difference]: Start difference. First operand has 131 places, 105 transitions, 965 flow. Second operand 8 states and 315 transitions. [2024-11-12 16:22:19,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 128 transitions, 1242 flow [2024-11-12 16:22:19,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 128 transitions, 1221 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:19,646 INFO L231 Difference]: Finished difference. Result has 133 places, 101 transitions, 950 flow [2024-11-12 16:22:19,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=133, PETRI_TRANSITIONS=101} [2024-11-12 16:22:19,647 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2024-11-12 16:22:19,647 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 101 transitions, 950 flow [2024-11-12 16:22:19,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2024-11-12 16:22:19,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:19,648 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:19,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:22:19,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:19,854 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:19,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:19,854 INFO L85 PathProgramCache]: Analyzing trace with hash -839964998, now seen corresponding path program 2 times [2024-11-12 16:22:19,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:19,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626386695] [2024-11-12 16:22:19,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626386695] [2024-11-12 16:22:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626386695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404183342] [2024-11-12 16:22:20,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:20,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:20,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:20,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:22:20,231 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:22:20,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:20,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:22:20,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:20,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:20,315 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:20,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-12 16:22:20,324 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:20,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:20,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:20,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2024-11-12 16:22:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404183342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:20,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-12 16:22:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85447487] [2024-11-12 16:22:20,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:20,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:22:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:22:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-12 16:22:25,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:29,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:29,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-12 16:22:29,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 101 transitions, 950 flow. Second operand has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 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) [2024-11-12 16:22:29,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-12 16:22:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:30,679 INFO L124 PetriNetUnfolderBase]: 1996/4087 cut-off events. [2024-11-12 16:22:30,679 INFO L125 PetriNetUnfolderBase]: For 10899/11141 co-relation queries the response was YES. [2024-11-12 16:22:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 4087 events. 1996/4087 cut-off events. For 10899/11141 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 28397 event pairs, 647 based on Foata normal form. 24/4069 useless extension candidates. Maximal degree in co-relation 11584. Up to 845 conditions per place. [2024-11-12 16:22:30,700 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 144 selfloop transitions, 32 changer transitions 0/189 dead transitions. [2024-11-12 16:22:30,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1687 flow [2024-11-12 16:22:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:22:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:22:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 448 transitions. [2024-11-12 16:22:30,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-11-12 16:22:30,702 INFO L175 Difference]: Start difference. First operand has 133 places, 101 transitions, 950 flow. Second operand 13 states and 448 transitions. [2024-11-12 16:22:30,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1687 flow [2024-11-12 16:22:30,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1629 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:30,716 INFO L231 Difference]: Finished difference. Result has 141 places, 105 transitions, 1025 flow [2024-11-12 16:22:30,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1025, PETRI_PLACES=141, PETRI_TRANSITIONS=105} [2024-11-12 16:22:30,717 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-11-12 16:22:30,717 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 105 transitions, 1025 flow [2024-11-12 16:22:30,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 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) [2024-11-12 16:22:30,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:30,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:30,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:22:30,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-12 16:22:30,918 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:30,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2089822815, now seen corresponding path program 2 times [2024-11-12 16:22:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:30,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540109918] [2024-11-12 16:22:30,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:30,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:31,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540109918] [2024-11-12 16:22:31,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540109918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347472312] [2024-11-12 16:22:31,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:31,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:31,066 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:22:31,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:22:31,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:31,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 16:22:31,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:31,166 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:22:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347472312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:31,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:22:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2024-11-12 16:22:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392245338] [2024-11-12 16:22:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:31,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:22:31,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-12 16:22:31,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 105 transitions, 1025 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2024-11-12 16:22:31,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:31,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-12 16:22:31,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:31,730 INFO L124 PetriNetUnfolderBase]: 2667/5977 cut-off events. [2024-11-12 16:22:31,730 INFO L125 PetriNetUnfolderBase]: For 18974/19497 co-relation queries the response was YES. [2024-11-12 16:22:31,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 5977 events. 2667/5977 cut-off events. For 18974/19497 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 49714 event pairs, 403 based on Foata normal form. 22/5899 useless extension candidates. Maximal degree in co-relation 10266. Up to 1999 conditions per place. [2024-11-12 16:22:31,757 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 90 selfloop transitions, 20 changer transitions 20/149 dead transitions. [2024-11-12 16:22:31,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 149 transitions, 1624 flow [2024-11-12 16:22:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2024-11-12 16:22:31,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-11-12 16:22:31,759 INFO L175 Difference]: Start difference. First operand has 141 places, 105 transitions, 1025 flow. Second operand 5 states and 216 transitions. [2024-11-12 16:22:31,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 149 transitions, 1624 flow [2024-11-12 16:22:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 149 transitions, 1577 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:31,774 INFO L231 Difference]: Finished difference. Result has 142 places, 92 transitions, 896 flow [2024-11-12 16:22:31,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=142, PETRI_TRANSITIONS=92} [2024-11-12 16:22:31,775 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 84 predicate places. [2024-11-12 16:22:31,775 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 92 transitions, 896 flow [2024-11-12 16:22:31,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2024-11-12 16:22:31,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:31,775 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:31,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 16:22:31,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-12 16:22:31,976 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:31,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -269110564, now seen corresponding path program 1 times [2024-11-12 16:22:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787831111] [2024-11-12 16:22:31,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:32,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:32,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787831111] [2024-11-12 16:22:32,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787831111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:32,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83242854] [2024-11-12 16:22:32,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:32,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:32,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:32,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:22:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:32,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:22:32,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:32,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:32,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2024-11-12 16:22:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83242854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:32,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-12 16:22:32,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936545315] [2024-11-12 16:22:32,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:32,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:22:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:22:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:22:33,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-12 16:22:33,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 92 transitions, 896 flow. Second operand has 20 states, 20 states have (on average 30.8) internal successors, (616), 20 states have internal predecessors, (616), 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) [2024-11-12 16:22:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:33,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-12 16:22:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:34,011 INFO L124 PetriNetUnfolderBase]: 3038/6121 cut-off events. [2024-11-12 16:22:34,011 INFO L125 PetriNetUnfolderBase]: For 19446/19915 co-relation queries the response was YES. [2024-11-12 16:22:34,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18422 conditions, 6121 events. 3038/6121 cut-off events. For 19446/19915 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 48350 event pairs, 1110 based on Foata normal form. 44/6048 useless extension candidates. Maximal degree in co-relation 11243. Up to 1252 conditions per place. [2024-11-12 16:22:34,043 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 140 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-12 16:22:34,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1670 flow [2024-11-12 16:22:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:22:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:22:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 411 transitions. [2024-11-12 16:22:34,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-11-12 16:22:34,045 INFO L175 Difference]: Start difference. First operand has 142 places, 92 transitions, 896 flow. Second operand 10 states and 411 transitions. [2024-11-12 16:22:34,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1670 flow [2024-11-12 16:22:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1525 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-11-12 16:22:34,061 INFO L231 Difference]: Finished difference. Result has 126 places, 94 transitions, 853 flow [2024-11-12 16:22:34,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=853, PETRI_PLACES=126, PETRI_TRANSITIONS=94} [2024-11-12 16:22:34,062 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-11-12 16:22:34,062 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 94 transitions, 853 flow [2024-11-12 16:22:34,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.8) internal successors, (616), 20 states have internal predecessors, (616), 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) [2024-11-12 16:22:34,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:34,063 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:34,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 16:22:34,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-12 16:22:34,263 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:34,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1918190684, now seen corresponding path program 2 times [2024-11-12 16:22:34,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:34,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210928101] [2024-11-12 16:22:34,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:34,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210928101] [2024-11-12 16:22:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210928101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429281334] [2024-11-12 16:22:34,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:34,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:34,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:22:34,569 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:22:34,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:34,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:22:34,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:34,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:34,645 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:34,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:34,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:34,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:34,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2024-11-12 16:22:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429281334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:35,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:35,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-12 16:22:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113102174] [2024-11-12 16:22:35,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:35,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:22:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:22:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-12 16:22:36,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-12 16:22:36,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 94 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 29.285714285714285) internal successors, (615), 21 states have internal predecessors, (615), 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) [2024-11-12 16:22:36,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:36,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-12 16:22:36,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:37,178 INFO L124 PetriNetUnfolderBase]: 3738/7760 cut-off events. [2024-11-12 16:22:37,179 INFO L125 PetriNetUnfolderBase]: For 24425/24967 co-relation queries the response was YES. [2024-11-12 16:22:37,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 7760 events. 3738/7760 cut-off events. For 24425/24967 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 63952 event pairs, 1224 based on Foata normal form. 66/7739 useless extension candidates. Maximal degree in co-relation 13066. Up to 1649 conditions per place. [2024-11-12 16:22:37,217 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 140 selfloop transitions, 25 changer transitions 0/183 dead transitions. [2024-11-12 16:22:37,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1746 flow [2024-11-12 16:22:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:22:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:22:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 472 transitions. [2024-11-12 16:22:37,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6051282051282051 [2024-11-12 16:22:37,220 INFO L175 Difference]: Start difference. First operand has 126 places, 94 transitions, 853 flow. Second operand 13 states and 472 transitions. [2024-11-12 16:22:37,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1746 flow [2024-11-12 16:22:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:37,304 INFO L231 Difference]: Finished difference. Result has 137 places, 97 transitions, 919 flow [2024-11-12 16:22:37,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=919, PETRI_PLACES=137, PETRI_TRANSITIONS=97} [2024-11-12 16:22:37,304 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 79 predicate places. [2024-11-12 16:22:37,305 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 97 transitions, 919 flow [2024-11-12 16:22:37,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 29.285714285714285) internal successors, (615), 21 states have internal predecessors, (615), 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) [2024-11-12 16:22:37,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:37,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:37,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:22:37,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:37,510 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:37,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1993985884, now seen corresponding path program 1 times [2024-11-12 16:22:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:37,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023755658] [2024-11-12 16:22:37,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:22:37,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023755658] [2024-11-12 16:22:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023755658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:37,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060758148] [2024-11-12 16:22:37,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:37,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:37,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:37,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:22:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:37,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:22:37,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:37,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060758148] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:37,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-12 16:22:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802051914] [2024-11-12 16:22:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:37,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:22:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:22:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:22:37,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:37,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 97 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 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) [2024-11-12 16:22:37,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:37,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:37,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:38,537 INFO L124 PetriNetUnfolderBase]: 3105/6618 cut-off events. [2024-11-12 16:22:38,537 INFO L125 PetriNetUnfolderBase]: For 26013/26582 co-relation queries the response was YES. [2024-11-12 16:22:38,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20918 conditions, 6618 events. 3105/6618 cut-off events. For 26013/26582 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 53830 event pairs, 1204 based on Foata normal form. 183/6678 useless extension candidates. Maximal degree in co-relation 12482. Up to 3028 conditions per place. [2024-11-12 16:22:38,567 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 75 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-11-12 16:22:38,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 118 transitions, 1311 flow [2024-11-12 16:22:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-12 16:22:38,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-12 16:22:38,568 INFO L175 Difference]: Start difference. First operand has 137 places, 97 transitions, 919 flow. Second operand 7 states and 259 transitions. [2024-11-12 16:22:38,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 118 transitions, 1311 flow [2024-11-12 16:22:38,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 1278 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:22:38,586 INFO L231 Difference]: Finished difference. Result has 138 places, 98 transitions, 972 flow [2024-11-12 16:22:38,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=138, PETRI_TRANSITIONS=98} [2024-11-12 16:22:38,587 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 80 predicate places. [2024-11-12 16:22:38,587 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 98 transitions, 972 flow [2024-11-12 16:22:38,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 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) [2024-11-12 16:22:38,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:38,588 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:38,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 16:22:38,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:38,789 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:38,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash -665630324, now seen corresponding path program 1 times [2024-11-12 16:22:38,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:38,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536922691] [2024-11-12 16:22:38,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536922691] [2024-11-12 16:22:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536922691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727022227] [2024-11-12 16:22:38,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:38,986 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:38,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:22:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:39,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:22:39,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:39,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:39,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2024-11-12 16:22:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727022227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:39,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-12 16:22:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559705608] [2024-11-12 16:22:39,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:39,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:22:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:22:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:22:39,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:22:39,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 98 transitions, 972 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 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) [2024-11-12 16:22:39,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:39,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:22:39,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:40,954 INFO L124 PetriNetUnfolderBase]: 3679/7029 cut-off events. [2024-11-12 16:22:40,954 INFO L125 PetriNetUnfolderBase]: For 30007/30540 co-relation queries the response was YES. [2024-11-12 16:22:40,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23512 conditions, 7029 events. 3679/7029 cut-off events. For 30007/30540 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 52192 event pairs, 973 based on Foata normal form. 66/6961 useless extension candidates. Maximal degree in co-relation 14187. Up to 1545 conditions per place. [2024-11-12 16:22:40,985 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 143 selfloop transitions, 25 changer transitions 0/188 dead transitions. [2024-11-12 16:22:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 1870 flow [2024-11-12 16:22:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:22:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:22:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 396 transitions. [2024-11-12 16:22:40,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-12 16:22:40,987 INFO L175 Difference]: Start difference. First operand has 138 places, 98 transitions, 972 flow. Second operand 10 states and 396 transitions. [2024-11-12 16:22:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 1870 flow [2024-11-12 16:22:41,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1839 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-12 16:22:41,015 INFO L231 Difference]: Finished difference. Result has 145 places, 100 transitions, 1024 flow [2024-11-12 16:22:41,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1024, PETRI_PLACES=145, PETRI_TRANSITIONS=100} [2024-11-12 16:22:41,016 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2024-11-12 16:22:41,016 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 100 transitions, 1024 flow [2024-11-12 16:22:41,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 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) [2024-11-12 16:22:41,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:41,017 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:41,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:41,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-12 16:22:41,217 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:41,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1631726976, now seen corresponding path program 3 times [2024-11-12 16:22:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:41,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461065507] [2024-11-12 16:22:41,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:22:41,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461065507] [2024-11-12 16:22:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461065507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361093681] [2024-11-12 16:22:41,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:22:41,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:41,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:41,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:22:41,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:22:41,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:41,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 16:22:41,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:41,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:41,494 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:41,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:41,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:22:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:22:41,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:41,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-11-12 16:22:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:22:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361093681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:41,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:41,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 22 [2024-11-12 16:22:41,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145504362] [2024-11-12 16:22:41,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:41,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:22:41,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:22:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:22:42,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-12 16:22:42,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 100 transitions, 1024 flow. Second operand has 22 states, 22 states have (on average 26.40909090909091) internal successors, (581), 22 states have internal predecessors, (581), 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) [2024-11-12 16:22:42,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:42,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-12 16:22:42,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:44,949 INFO L124 PetriNetUnfolderBase]: 7385/13705 cut-off events. [2024-11-12 16:22:44,949 INFO L125 PetriNetUnfolderBase]: For 69920/70394 co-relation queries the response was YES. [2024-11-12 16:22:44,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48547 conditions, 13705 events. 7385/13705 cut-off events. For 69920/70394 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 112048 event pairs, 1026 based on Foata normal form. 152/13830 useless extension candidates. Maximal degree in co-relation 28343. Up to 2202 conditions per place. [2024-11-12 16:22:45,028 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 264 selfloop transitions, 52 changer transitions 0/331 dead transitions. [2024-11-12 16:22:45,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 331 transitions, 3639 flow [2024-11-12 16:22:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 16:22:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-12 16:22:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 690 transitions. [2024-11-12 16:22:45,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-11-12 16:22:45,031 INFO L175 Difference]: Start difference. First operand has 145 places, 100 transitions, 1024 flow. Second operand 21 states and 690 transitions. [2024-11-12 16:22:45,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 331 transitions, 3639 flow [2024-11-12 16:22:45,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 331 transitions, 3567 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:45,083 INFO L231 Difference]: Finished difference. Result has 162 places, 118 transitions, 1371 flow [2024-11-12 16:22:45,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1371, PETRI_PLACES=162, PETRI_TRANSITIONS=118} [2024-11-12 16:22:45,083 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-11-12 16:22:45,083 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 118 transitions, 1371 flow [2024-11-12 16:22:45,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.40909090909091) internal successors, (581), 22 states have internal predecessors, (581), 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) [2024-11-12 16:22:45,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:45,084 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:45,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:45,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 16:22:45,285 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:45,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash 71638690, now seen corresponding path program 3 times [2024-11-12 16:22:45,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:45,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341446970] [2024-11-12 16:22:45,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:45,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:45,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341446970] [2024-11-12 16:22:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341446970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83051495] [2024-11-12 16:22:45,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:22:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:45,427 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:45,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 16:22:45,523 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:22:45,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:45,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 16:22:45,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:45,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-12 16:22:45,590 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:45,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:45,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:22:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:22:45,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:45,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-11-12 16:22:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:22:46,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83051495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:46,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:46,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-12 16:22:46,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990950416] [2024-11-12 16:22:46,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:46,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:22:46,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:22:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:22:47,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-12 16:22:47,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 118 transitions, 1371 flow. Second operand has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 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) [2024-11-12 16:22:47,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:47,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-12 16:22:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:50,348 INFO L124 PetriNetUnfolderBase]: 12397/24073 cut-off events. [2024-11-12 16:22:50,348 INFO L125 PetriNetUnfolderBase]: For 111933/112563 co-relation queries the response was YES. [2024-11-12 16:22:50,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82641 conditions, 24073 events. 12397/24073 cut-off events. For 111933/112563 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 214444 event pairs, 1094 based on Foata normal form. 346/24397 useless extension candidates. Maximal degree in co-relation 48189. Up to 3748 conditions per place. [2024-11-12 16:22:50,479 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 308 selfloop transitions, 61 changer transitions 0/384 dead transitions. [2024-11-12 16:22:50,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 384 transitions, 4830 flow [2024-11-12 16:22:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 16:22:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 16:22:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 653 transitions. [2024-11-12 16:22:50,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5441666666666667 [2024-11-12 16:22:50,481 INFO L175 Difference]: Start difference. First operand has 162 places, 118 transitions, 1371 flow. Second operand 20 states and 653 transitions. [2024-11-12 16:22:50,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 384 transitions, 4830 flow [2024-11-12 16:22:50,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 384 transitions, 4670 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-11-12 16:22:50,791 INFO L231 Difference]: Finished difference. Result has 171 places, 139 transitions, 1698 flow [2024-11-12 16:22:50,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1698, PETRI_PLACES=171, PETRI_TRANSITIONS=139} [2024-11-12 16:22:50,791 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 113 predicate places. [2024-11-12 16:22:50,791 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 139 transitions, 1698 flow [2024-11-12 16:22:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 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) [2024-11-12 16:22:50,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:50,792 INFO L206 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] [2024-11-12 16:22:50,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:50,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 16:22:50,993 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:50,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1921934338, now seen corresponding path program 1 times [2024-11-12 16:22:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002750330] [2024-11-12 16:22:50,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:51,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002750330] [2024-11-12 16:22:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002750330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972353843] [2024-11-12 16:22:51,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:51,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:51,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:51,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:51,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 16:22:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:51,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:22:51,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:51,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972353843] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:51,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:22:51,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-12 16:22:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895361974] [2024-11-12 16:22:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:51,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:22:51,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:51,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:22:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:22:51,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:51,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 139 transitions, 1698 flow. Second operand has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2024-11-12 16:22:51,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:51,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:53,075 INFO L124 PetriNetUnfolderBase]: 6976/14727 cut-off events. [2024-11-12 16:22:53,075 INFO L125 PetriNetUnfolderBase]: For 95066/96816 co-relation queries the response was YES. [2024-11-12 16:22:53,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54729 conditions, 14727 events. 6976/14727 cut-off events. For 95066/96816 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 139351 event pairs, 3026 based on Foata normal form. 348/14767 useless extension candidates. Maximal degree in co-relation 32987. Up to 6807 conditions per place. [2024-11-12 16:22:53,172 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 102 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2024-11-12 16:22:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 166 transitions, 2327 flow [2024-11-12 16:22:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:22:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:22:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-11-12 16:22:53,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-11-12 16:22:53,174 INFO L175 Difference]: Start difference. First operand has 171 places, 139 transitions, 1698 flow. Second operand 7 states and 261 transitions. [2024-11-12 16:22:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 166 transitions, 2327 flow [2024-11-12 16:22:53,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 166 transitions, 2266 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:53,248 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1757 flow [2024-11-12 16:22:53,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1757, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-11-12 16:22:53,248 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 116 predicate places. [2024-11-12 16:22:53,248 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1757 flow [2024-11-12 16:22:53,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2024-11-12 16:22:53,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:53,249 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:53,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-12 16:22:53,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-12 16:22:53,449 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:53,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash -81974301, now seen corresponding path program 2 times [2024-11-12 16:22:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:53,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573649590] [2024-11-12 16:22:53,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 16:22:53,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573649590] [2024-11-12 16:22:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573649590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048861548] [2024-11-12 16:22:53,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:53,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:53,824 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 16:22:53,908 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:22:53,908 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:53,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:22:53,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 16:22:53,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 16:22:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048861548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:54,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-12 16:22:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696836393] [2024-11-12 16:22:54,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:54,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:22:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:22:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:22:54,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:54,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1757 flow. Second operand has 19 states, 19 states have (on average 32.94736842105263) internal successors, (626), 19 states have internal predecessors, (626), 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) [2024-11-12 16:22:54,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:54,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:54,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:55,669 INFO L124 PetriNetUnfolderBase]: 6671/13541 cut-off events. [2024-11-12 16:22:55,669 INFO L125 PetriNetUnfolderBase]: For 97374/99136 co-relation queries the response was YES. [2024-11-12 16:22:55,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51287 conditions, 13541 events. 6671/13541 cut-off events. For 97374/99136 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 124271 event pairs, 3230 based on Foata normal form. 72/13282 useless extension candidates. Maximal degree in co-relation 43534. Up to 5661 conditions per place. [2024-11-12 16:22:55,736 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 136 selfloop transitions, 63 changer transitions 0/226 dead transitions. [2024-11-12 16:22:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 226 transitions, 3011 flow [2024-11-12 16:22:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:22:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:22:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-12 16:22:55,737 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-11-12 16:22:55,737 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1757 flow. Second operand 12 states and 472 transitions. [2024-11-12 16:22:55,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 226 transitions, 3011 flow [2024-11-12 16:22:55,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 226 transitions, 2905 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:55,796 INFO L231 Difference]: Finished difference. Result has 184 places, 154 transitions, 2200 flow [2024-11-12 16:22:55,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2200, PETRI_PLACES=184, PETRI_TRANSITIONS=154} [2024-11-12 16:22:55,797 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 126 predicate places. [2024-11-12 16:22:55,797 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 154 transitions, 2200 flow [2024-11-12 16:22:55,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 32.94736842105263) internal successors, (626), 19 states have internal predecessors, (626), 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) [2024-11-12 16:22:55,797 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:55,797 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:55,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:55,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:55,998 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:55,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash 535567551, now seen corresponding path program 2 times [2024-11-12 16:22:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:55,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269271814] [2024-11-12 16:22:55,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:55,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-12 16:22:56,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269271814] [2024-11-12 16:22:56,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269271814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432544966] [2024-11-12 16:22:56,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:22:56,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:56,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:56,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 16:22:56,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:22:56,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:56,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:22:56,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-12 16:22:56,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-12 16:22:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432544966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:56,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-12 16:22:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177524658] [2024-11-12 16:22:56,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:56,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:22:56,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:22:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:22:56,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-12 16:22:56,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 154 transitions, 2200 flow. Second operand has 19 states, 19 states have (on average 33.05263157894737) internal successors, (628), 19 states have internal predecessors, (628), 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) [2024-11-12 16:22:56,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:56,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-12 16:22:56,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:58,498 INFO L124 PetriNetUnfolderBase]: 6444/13474 cut-off events. [2024-11-12 16:22:58,498 INFO L125 PetriNetUnfolderBase]: For 98134/99634 co-relation queries the response was YES. [2024-11-12 16:22:58,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50085 conditions, 13474 events. 6444/13474 cut-off events. For 98134/99634 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 124578 event pairs, 3010 based on Foata normal form. 52/13309 useless extension candidates. Maximal degree in co-relation 41978. Up to 5302 conditions per place. [2024-11-12 16:22:58,563 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 166 selfloop transitions, 52 changer transitions 0/245 dead transitions. [2024-11-12 16:22:58,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 245 transitions, 3727 flow [2024-11-12 16:22:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:22:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:22:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-11-12 16:22:58,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6683333333333333 [2024-11-12 16:22:58,564 INFO L175 Difference]: Start difference. First operand has 184 places, 154 transitions, 2200 flow. Second operand 10 states and 401 transitions. [2024-11-12 16:22:58,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 245 transitions, 3727 flow [2024-11-12 16:22:58,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 245 transitions, 3676 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:58,643 INFO L231 Difference]: Finished difference. Result has 191 places, 165 transitions, 2554 flow [2024-11-12 16:22:58,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2554, PETRI_PLACES=191, PETRI_TRANSITIONS=165} [2024-11-12 16:22:58,643 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 133 predicate places. [2024-11-12 16:22:58,644 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 165 transitions, 2554 flow [2024-11-12 16:22:58,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 33.05263157894737) internal successors, (628), 19 states have internal predecessors, (628), 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) [2024-11-12 16:22:58,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:58,644 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:58,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-12 16:22:58,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:58,845 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:22:58,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1767206756, now seen corresponding path program 3 times [2024-11-12 16:22:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:58,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620602140] [2024-11-12 16:22:58,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-12 16:22:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620602140] [2024-11-12 16:22:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620602140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980908867] [2024-11-12 16:22:59,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:22:59,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:59,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:59,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 16:22:59,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-12 16:22:59,227 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:22:59,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:22:59,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-12 16:22:59,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:59,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 5 [2024-11-12 16:22:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-12 16:22:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980908867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:59,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:59,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2024-11-12 16:22:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638558719] [2024-11-12 16:22:59,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:59,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:22:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:22:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:23:00,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-12 16:23:00,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 165 transitions, 2554 flow. Second operand has 25 states, 25 states have (on average 28.68) internal successors, (717), 25 states have internal predecessors, (717), 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) [2024-11-12 16:23:00,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:00,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-12 16:23:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:03,380 INFO L124 PetriNetUnfolderBase]: 9565/18663 cut-off events. [2024-11-12 16:23:03,380 INFO L125 PetriNetUnfolderBase]: For 114600/114600 co-relation queries the response was YES. [2024-11-12 16:23:03,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70013 conditions, 18663 events. 9565/18663 cut-off events. For 114600/114600 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 159217 event pairs, 3090 based on Foata normal form. 80/18641 useless extension candidates. Maximal degree in co-relation 59848. Up to 4191 conditions per place. [2024-11-12 16:23:03,689 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 248 selfloop transitions, 53 changer transitions 0/321 dead transitions. [2024-11-12 16:23:03,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 321 transitions, 4516 flow [2024-11-12 16:23:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:23:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:23:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 482 transitions. [2024-11-12 16:23:03,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-11-12 16:23:03,691 INFO L175 Difference]: Start difference. First operand has 191 places, 165 transitions, 2554 flow. Second operand 12 states and 482 transitions. [2024-11-12 16:23:03,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 321 transitions, 4516 flow [2024-11-12 16:23:03,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 321 transitions, 4458 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:23:03,851 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 2683 flow [2024-11-12 16:23:03,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2683, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-11-12 16:23:03,851 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 142 predicate places. [2024-11-12 16:23:03,851 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 2683 flow [2024-11-12 16:23:03,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 28.68) internal successors, (717), 25 states have internal predecessors, (717), 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) [2024-11-12 16:23:03,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:03,852 INFO L206 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, 1] [2024-11-12 16:23:03,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-12 16:23:04,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:04,052 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:23:04,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1992480622, now seen corresponding path program 1 times [2024-11-12 16:23:04,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:04,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724370402] [2024-11-12 16:23:04,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:04,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:23:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724370402] [2024-11-12 16:23:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724370402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004499482] [2024-11-12 16:23:04,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:04,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:04,281 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:23:04,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-12 16:23:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:04,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:23:04,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:04,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:23:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004499482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:04,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:04,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2024-11-12 16:23:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241795986] [2024-11-12 16:23:04,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:04,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-12 16:23:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-12 16:23:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-12 16:23:04,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-12 16:23:04,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 2683 flow. Second operand has 23 states, 23 states have (on average 34.869565217391305) internal successors, (802), 23 states have internal predecessors, (802), 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) [2024-11-12 16:23:04,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:04,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-12 16:23:04,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:06,977 INFO L124 PetriNetUnfolderBase]: 6041/13126 cut-off events. [2024-11-12 16:23:06,978 INFO L125 PetriNetUnfolderBase]: For 115196/116745 co-relation queries the response was YES. [2024-11-12 16:23:07,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51185 conditions, 13126 events. 6041/13126 cut-off events. For 115196/116745 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 124153 event pairs, 3150 based on Foata normal form. 11/12765 useless extension candidates. Maximal degree in co-relation 43808. Up to 9064 conditions per place. [2024-11-12 16:23:07,068 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 163 selfloop transitions, 62 changer transitions 2/260 dead transitions. [2024-11-12 16:23:07,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 260 transitions, 3646 flow [2024-11-12 16:23:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 16:23:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 16:23:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 714 transitions. [2024-11-12 16:23:07,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-12 16:23:07,070 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 2683 flow. Second operand 18 states and 714 transitions. [2024-11-12 16:23:07,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 260 transitions, 3646 flow [2024-11-12 16:23:07,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 260 transitions, 3537 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-12 16:23:07,201 INFO L231 Difference]: Finished difference. Result has 213 places, 180 transitions, 2832 flow [2024-11-12 16:23:07,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2832, PETRI_PLACES=213, PETRI_TRANSITIONS=180} [2024-11-12 16:23:07,201 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 155 predicate places. [2024-11-12 16:23:07,201 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 180 transitions, 2832 flow [2024-11-12 16:23:07,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 34.869565217391305) internal successors, (802), 23 states have internal predecessors, (802), 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) [2024-11-12 16:23:07,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:07,202 INFO L206 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, 1, 1] [2024-11-12 16:23:07,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-12 16:23:07,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:07,403 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:23:07,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -51736739, now seen corresponding path program 1 times [2024-11-12 16:23:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985313094] [2024-11-12 16:23:07,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:07,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:07,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985313094] [2024-11-12 16:23:07,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985313094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:07,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-12 16:23:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510361175] [2024-11-12 16:23:07,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:07,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:23:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:23:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:23:08,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:23:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 180 transitions, 2832 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 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) [2024-11-12 16:23:08,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:23:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:11,268 INFO L124 PetriNetUnfolderBase]: 11134/21316 cut-off events. [2024-11-12 16:23:11,268 INFO L125 PetriNetUnfolderBase]: For 141021/141037 co-relation queries the response was YES. [2024-11-12 16:23:11,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85547 conditions, 21316 events. 11134/21316 cut-off events. For 141021/141037 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 182148 event pairs, 6074 based on Foata normal form. 79/21394 useless extension candidates. Maximal degree in co-relation 77637. Up to 12404 conditions per place. [2024-11-12 16:23:11,436 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 309 selfloop transitions, 71 changer transitions 0/391 dead transitions. [2024-11-12 16:23:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 391 transitions, 6419 flow [2024-11-12 16:23:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:23:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:23:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 411 transitions. [2024-11-12 16:23:11,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-11-12 16:23:11,439 INFO L175 Difference]: Start difference. First operand has 213 places, 180 transitions, 2832 flow. Second operand 11 states and 411 transitions. [2024-11-12 16:23:11,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 391 transitions, 6419 flow [2024-11-12 16:23:11,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 391 transitions, 6351 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-12 16:23:11,710 INFO L231 Difference]: Finished difference. Result has 220 places, 196 transitions, 3300 flow [2024-11-12 16:23:11,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3300, PETRI_PLACES=220, PETRI_TRANSITIONS=196} [2024-11-12 16:23:11,711 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 162 predicate places. [2024-11-12 16:23:11,711 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 196 transitions, 3300 flow [2024-11-12 16:23:11,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 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) [2024-11-12 16:23:11,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:11,712 INFO L206 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, 1, 1] [2024-11-12 16:23:11,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-12 16:23:11,712 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:23:11,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1402275315, now seen corresponding path program 2 times [2024-11-12 16:23:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998688461] [2024-11-12 16:23:11,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:11,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998688461] [2024-11-12 16:23:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998688461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415073388] [2024-11-12 16:23:12,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:23:12,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:12,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:12,394 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:23:12,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-12 16:23:12,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:23:12,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:23:12,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 16:23:12,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:12,634 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-12 16:23:12,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-12 16:23:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:12,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:12,759 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-12 16:23:12,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-12 16:23:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 16:23:12,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415073388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:12,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:12,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2024-11-12 16:23:12,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210553048] [2024-11-12 16:23:12,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:12,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 16:23:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 16:23:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2024-11-12 16:23:13,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-12 16:23:13,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 196 transitions, 3300 flow. Second operand has 26 states, 26 states have (on average 30.46153846153846) internal successors, (792), 26 states have internal predecessors, (792), 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) [2024-11-12 16:23:13,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-12 16:23:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:17,569 INFO L124 PetriNetUnfolderBase]: 12316/23668 cut-off events. [2024-11-12 16:23:17,569 INFO L125 PetriNetUnfolderBase]: For 184476/184488 co-relation queries the response was YES. [2024-11-12 16:23:17,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102483 conditions, 23668 events. 12316/23668 cut-off events. For 184476/184488 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 207439 event pairs, 6560 based on Foata normal form. 140/23788 useless extension candidates. Maximal degree in co-relation 92488. Up to 12588 conditions per place. [2024-11-12 16:23:18,101 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 261 selfloop transitions, 132 changer transitions 8/412 dead transitions. [2024-11-12 16:23:18,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 412 transitions, 7236 flow [2024-11-12 16:23:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:23:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:23:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 456 transitions. [2024-11-12 16:23:18,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-12 16:23:18,102 INFO L175 Difference]: Start difference. First operand has 220 places, 196 transitions, 3300 flow. Second operand 12 states and 456 transitions. [2024-11-12 16:23:18,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 412 transitions, 7236 flow [2024-11-12 16:23:18,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 412 transitions, 6857 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-11-12 16:23:18,436 INFO L231 Difference]: Finished difference. Result has 233 places, 264 transitions, 5082 flow [2024-11-12 16:23:18,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5082, PETRI_PLACES=233, PETRI_TRANSITIONS=264} [2024-11-12 16:23:18,437 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 175 predicate places. [2024-11-12 16:23:18,437 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 264 transitions, 5082 flow [2024-11-12 16:23:18,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 30.46153846153846) internal successors, (792), 26 states have internal predecessors, (792), 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) [2024-11-12 16:23:18,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:18,437 INFO L206 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, 1, 1] [2024-11-12 16:23:18,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-12 16:23:18,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:18,638 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-12 16:23:18,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 241583669, now seen corresponding path program 1 times [2024-11-12 16:23:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931795127] [2024-11-12 16:23:18,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:18,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:18,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931795127] [2024-11-12 16:23:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931795127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:23:18,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:23:18,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-12 16:23:18,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462351073] [2024-11-12 16:23:18,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:23:18,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:23:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:23:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132