./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:10:11,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:10:11,934 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:10:11,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:10:11,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:10:11,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:10:11,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:10:11,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:10:11,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:10:11,974 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:10:11,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:10:11,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:10:11,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:10:11,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:10:11,975 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:10:11,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:10:11,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:10:11,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:10:11,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:10:11,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:10:11,980 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:10:11,981 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:10:11,981 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:10:11,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:10:11,981 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:10:11,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:10:11,982 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:10:11,982 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:10:11,982 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:10:11,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:10:11,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:10:11,983 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:10:11,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:10:11,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:11,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:10:11,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:10:11,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:10:11,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:10:11,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:10:11,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:10:11,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:10:11,992 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:10:11,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 [2024-10-13 12:10:12,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:10:12,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:10:12,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:10:12,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:10:12,270 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:10:12,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-13 12:10:13,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:10:13,859 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:10:13,860 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-13 12:10:13,874 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f71c09d2/7b5ca63fbb074732ab3f198cc0a05932/FLAG1e0578728 [2024-10-13 12:10:14,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f71c09d2/7b5ca63fbb074732ab3f198cc0a05932 [2024-10-13 12:10:14,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:10:14,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:10:14,209 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:14,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:10:14,213 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:10:14,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2a1e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14, skipping insertion in model container [2024-10-13 12:10:14,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,256 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:10:14,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:14,649 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:10:14,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:10:14,735 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:10:14,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14 WrapperNode [2024-10-13 12:10:14,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:10:14,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:14,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:10:14,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:10:14,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,773 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 98 [2024-10-13 12:10:14,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:10:14,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:10:14,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:10:14,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:10:14,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,808 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-13 12:10:14,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,828 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:10:14,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:10:14,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:10:14,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:10:14,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (1/1) ... [2024-10-13 12:10:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:10:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:14,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 12:10:14,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 12:10:14,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:10:14,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:10:14,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:10:14,922 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 12:10:14,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:10:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:10:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:10:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:10:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:10:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:10:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:10:14,926 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:10:15,057 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:10:15,060 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:10:15,248 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:10:15,248 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:10:15,393 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:10:15,394 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 12:10:15,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:15 BoogieIcfgContainer [2024-10-13 12:10:15,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:10:15,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:10:15,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:10:15,403 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:10:15,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:10:14" (1/3) ... [2024-10-13 12:10:15,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365257c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:15, skipping insertion in model container [2024-10-13 12:10:15,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:10:14" (2/3) ... [2024-10-13 12:10:15,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365257c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:10:15, skipping insertion in model container [2024-10-13 12:10:15,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:10:15" (3/3) ... [2024-10-13 12:10:15,406 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-pthread.i [2024-10-13 12:10:15,423 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:10:15,424 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-13 12:10:15,424 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:10:15,479 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:15,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 37 transitions, 78 flow [2024-10-13 12:10:15,549 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-10-13 12:10:15,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-13 12:10:15,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 37 transitions, 78 flow [2024-10-13 12:10:15,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 37 transitions, 78 flow [2024-10-13 12:10:15,565 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:15,571 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;@7a79c573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:15,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-10-13 12:10:15,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:15,575 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:15,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:15,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:15,576 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:15,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:15,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash 315512, now seen corresponding path program 1 times [2024-10-13 12:10:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155519845] [2024-10-13 12:10:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:15,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:15,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155519845] [2024-10-13 12:10:15,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155519845] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:15,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:15,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:15,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686375266] [2024-10-13 12:10:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:15,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:16,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-10-13 12:10:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:16,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-10-13 12:10:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:16,094 INFO L124 PetriNetUnfolderBase]: 25/88 cut-off events. [2024-10-13 12:10:16,095 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:16,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 88 events. 25/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 6/90 useless extension candidates. Maximal degree in co-relation 130. Up to 56 conditions per place. [2024-10-13 12:10:16,098 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2024-10-13 12:10:16,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 96 flow [2024-10-13 12:10:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-13 12:10:16,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2024-10-13 12:10:16,118 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 78 flow. Second operand 3 states and 61 transitions. [2024-10-13 12:10:16,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 96 flow [2024-10-13 12:10:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:16,126 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2024-10-13 12:10:16,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-13 12:10:16,133 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-13 12:10:16,134 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2024-10-13 12:10:16,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:16,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:16,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:10:16,135 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:16,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash 315513, now seen corresponding path program 1 times [2024-10-13 12:10:16,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952098626] [2024-10-13 12:10:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:16,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952098626] [2024-10-13 12:10:16,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952098626] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:16,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:16,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:16,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257365168] [2024-10-13 12:10:16,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:16,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:16,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 12:10:16,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:16,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 12:10:16,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:16,355 INFO L124 PetriNetUnfolderBase]: 25/90 cut-off events. [2024-10-13 12:10:16,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 90 events. 25/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 18 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 149. Up to 58 conditions per place. [2024-10-13 12:10:16,357 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 18 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-10-13 12:10:16,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 108 flow [2024-10-13 12:10:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-10-13 12:10:16,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5765765765765766 [2024-10-13 12:10:16,359 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 64 transitions. [2024-10-13 12:10:16,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 108 flow [2024-10-13 12:10:16,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:16,361 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 77 flow [2024-10-13 12:10:16,361 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-10-13 12:10:16,362 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-10-13 12:10:16,362 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 77 flow [2024-10-13 12:10:16,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:16,363 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:16,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:10:16,363 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:16,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash 303217908, now seen corresponding path program 1 times [2024-10-13 12:10:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:16,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964604056] [2024-10-13 12:10:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964604056] [2024-10-13 12:10:16,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964604056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:16,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161814952] [2024-10-13 12:10:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:16,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:16,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:16,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:16,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:10:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:16,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:16,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161814952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:16,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:16,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715992036] [2024-10-13 12:10:16,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:16,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:16,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 12:10:16,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 77 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:16,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 12:10:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:16,923 INFO L124 PetriNetUnfolderBase]: 27/98 cut-off events. [2024-10-13 12:10:16,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:16,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 98 events. 27/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 18 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 175. Up to 60 conditions per place. [2024-10-13 12:10:16,925 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 21 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-10-13 12:10:16,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 161 flow [2024-10-13 12:10:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-10-13 12:10:16,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-10-13 12:10:16,927 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 77 flow. Second operand 6 states and 116 transitions. [2024-10-13 12:10:16,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 161 flow [2024-10-13 12:10:16,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:16,928 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 127 flow [2024-10-13 12:10:16,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-10-13 12:10:16,929 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-10-13 12:10:16,929 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 127 flow [2024-10-13 12:10:16,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:16,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:16,930 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:16,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:10:17,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:17,131 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:17,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1614088245, now seen corresponding path program 1 times [2024-10-13 12:10:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:17,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275926137] [2024-10-13 12:10:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:17,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:17,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275926137] [2024-10-13 12:10:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275926137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178534340] [2024-10-13 12:10:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:17,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:17,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:10:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:17,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:17,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:17,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:10:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178534340] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:17,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:17,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:17,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382566574] [2024-10-13 12:10:17,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:17,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:17,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-10-13 12:10:17,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:17,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:17,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-10-13 12:10:17,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:17,542 INFO L124 PetriNetUnfolderBase]: 25/100 cut-off events. [2024-10-13 12:10:17,543 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-13 12:10:17,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 100 events. 25/100 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 238 event pairs, 18 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 192. Up to 55 conditions per place. [2024-10-13 12:10:17,544 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-10-13 12:10:17,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 187 flow [2024-10-13 12:10:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-10-13 12:10:17,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-10-13 12:10:17,547 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 127 flow. Second operand 8 states and 152 transitions. [2024-10-13 12:10:17,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 187 flow [2024-10-13 12:10:17,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 179 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:17,551 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 143 flow [2024-10-13 12:10:17,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=143, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-10-13 12:10:17,551 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2024-10-13 12:10:17,552 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 143 flow [2024-10-13 12:10:17,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:17,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:17,552 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:17,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:10:17,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 12:10:17,754 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:17,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1574965733, now seen corresponding path program 2 times [2024-10-13 12:10:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275056777] [2024-10-13 12:10:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:18,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275056777] [2024-10-13 12:10:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275056777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232062983] [2024-10-13 12:10:18,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:18,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:18,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:18,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:10:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:18,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:18,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:18,335 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:18,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232062983] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:18,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568984788] [2024-10-13 12:10:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:18,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:18,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 12:10:18,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-10-13 12:10:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 12:10:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:18,435 INFO L124 PetriNetUnfolderBase]: 25/98 cut-off events. [2024-10-13 12:10:18,435 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-13 12:10:18,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 25/98 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 236 event pairs, 18 based on Foata normal form. 2/97 useless extension candidates. Maximal degree in co-relation 197. Up to 54 conditions per place. [2024-10-13 12:10:18,436 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-10-13 12:10:18,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 38 transitions, 203 flow [2024-10-13 12:10:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-10-13 12:10:18,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46621621621621623 [2024-10-13 12:10:18,441 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 143 flow. Second operand 8 states and 138 transitions. [2024-10-13 12:10:18,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 38 transitions, 203 flow [2024-10-13 12:10:18,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 177 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-13 12:10:18,443 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 139 flow [2024-10-13 12:10:18,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2024-10-13 12:10:18,445 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-10-13 12:10:18,445 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 139 flow [2024-10-13 12:10:18,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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) [2024-10-13 12:10:18,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:18,446 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:18,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:18,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:18,647 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-10-13 12:10:18,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1608639071, now seen corresponding path program 2 times [2024-10-13 12:10:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:18,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113325587] [2024-10-13 12:10:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:18,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:18,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:18,723 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:18,724 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-10-13 12:10:18,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-10-13 12:10:18,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-10-13 12:10:18,727 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-10-13 12:10:18,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:10:18,728 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-13 12:10:18,730 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:18,730 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:10:18,754 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 62 transitions, 134 flow [2024-10-13 12:10:18,768 INFO L124 PetriNetUnfolderBase]: 9/71 cut-off events. [2024-10-13 12:10:18,769 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:10:18,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 9/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 202 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2024-10-13 12:10:18,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 62 transitions, 134 flow [2024-10-13 12:10:18,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 62 transitions, 134 flow [2024-10-13 12:10:18,772 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:18,774 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;@7a79c573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:18,774 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-10-13 12:10:18,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:18,776 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:18,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:18,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:18,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:18,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:18,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 377078, now seen corresponding path program 1 times [2024-10-13 12:10:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365083627] [2024-10-13 12:10:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:18,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365083627] [2024-10-13 12:10:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365083627] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:18,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528169388] [2024-10-13 12:10:18,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:18,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:18,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2024-10-13 12:10:18,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:18,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:18,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2024-10-13 12:10:18,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:18,980 INFO L124 PetriNetUnfolderBase]: 548/1213 cut-off events. [2024-10-13 12:10:18,980 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-13 12:10:18,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2115 conditions, 1213 events. 548/1213 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 182/1336 useless extension candidates. Maximal degree in co-relation 1288. Up to 866 conditions per place. [2024-10-13 12:10:18,992 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2024-10-13 12:10:18,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 166 flow [2024-10-13 12:10:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-10-13 12:10:18,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-10-13 12:10:18,994 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 134 flow. Second operand 3 states and 105 transitions. [2024-10-13 12:10:18,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 166 flow [2024-10-13 12:10:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:18,996 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 112 flow [2024-10-13 12:10:18,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-13 12:10:18,997 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-13 12:10:18,997 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 112 flow [2024-10-13 12:10:18,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:18,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:18,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:18,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:10:18,997 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:18,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash 377079, now seen corresponding path program 1 times [2024-10-13 12:10:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:19,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885934003] [2024-10-13 12:10:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:19,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885934003] [2024-10-13 12:10:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885934003] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:19,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175477373] [2024-10-13 12:10:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:19,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:19,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-13 12:10:19,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:19,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:19,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-13 12:10:19,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:19,210 INFO L124 PetriNetUnfolderBase]: 548/1215 cut-off events. [2024-10-13 12:10:19,210 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-13 12:10:19,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1215 events. 548/1215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 0/1155 useless extension candidates. Maximal degree in co-relation 2114. Up to 868 conditions per place. [2024-10-13 12:10:19,220 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 29 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-13 12:10:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 178 flow [2024-10-13 12:10:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-13 12:10:19,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-10-13 12:10:19,222 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 108 transitions. [2024-10-13 12:10:19,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 178 flow [2024-10-13 12:10:19,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:19,224 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 125 flow [2024-10-13 12:10:19,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-10-13 12:10:19,225 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2024-10-13 12:10:19,225 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 125 flow [2024-10-13 12:10:19,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:19,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:19,226 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:19,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:10:19,226 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:19,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash 362384818, now seen corresponding path program 1 times [2024-10-13 12:10:19,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:19,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331171098] [2024-10-13 12:10:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:19,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331171098] [2024-10-13 12:10:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331171098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090596104] [2024-10-13 12:10:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:19,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:19,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:19,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:10:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:19,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:19,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090596104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:19,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683718143] [2024-10-13 12:10:19,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:19,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:19,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-13 12:10:19,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:19,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:19,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-13 12:10:19,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:19,746 INFO L124 PetriNetUnfolderBase]: 550/1223 cut-off events. [2024-10-13 12:10:19,746 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-13 12:10:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2150 conditions, 1223 events. 550/1223 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7097 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2140. Up to 870 conditions per place. [2024-10-13 12:10:19,755 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 32 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-10-13 12:10:19,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 231 flow [2024-10-13 12:10:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-10-13 12:10:19,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188172043010753 [2024-10-13 12:10:19,757 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 125 flow. Second operand 6 states and 193 transitions. [2024-10-13 12:10:19,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 231 flow [2024-10-13 12:10:19,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:19,759 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 175 flow [2024-10-13 12:10:19,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-10-13 12:10:19,759 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-10-13 12:10:19,760 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 175 flow [2024-10-13 12:10:19,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:19,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:19,760 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:19,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:19,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:19,965 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:19,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash -448912541, now seen corresponding path program 2 times [2024-10-13 12:10:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632485952] [2024-10-13 12:10:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632485952] [2024-10-13 12:10:20,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632485952] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:20,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906680958] [2024-10-13 12:10:20,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:20,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:20,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:20,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:20,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:10:20,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:20,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:20,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:20,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:20,355 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:20,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906680958] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:20,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:20,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:20,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487384815] [2024-10-13 12:10:20,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:20,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:20,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:20,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-13 12:10:20,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:20,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-13 12:10:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:20,523 INFO L124 PetriNetUnfolderBase]: 550/1222 cut-off events. [2024-10-13 12:10:20,524 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-10-13 12:10:20,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 1222 events. 550/1222 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 2149. Up to 866 conditions per place. [2024-10-13 12:10:20,530 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 28 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-10-13 12:10:20,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 249 flow [2024-10-13 12:10:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-10-13 12:10:20,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48185483870967744 [2024-10-13 12:10:20,531 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 175 flow. Second operand 8 states and 239 transitions. [2024-10-13 12:10:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 249 flow [2024-10-13 12:10:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 223 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-13 12:10:20,533 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 167 flow [2024-10-13 12:10:20,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-10-13 12:10:20,534 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2024-10-13 12:10:20,534 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 167 flow [2024-10-13 12:10:20,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:20,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:20,535 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:20,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:20,738 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,SelfDestructingSolverStorable9 [2024-10-13 12:10:20,739 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:20,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash -409036415, now seen corresponding path program 1 times [2024-10-13 12:10:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113263650] [2024-10-13 12:10:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:20,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:20,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113263650] [2024-10-13 12:10:20,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113263650] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064604306] [2024-10-13 12:10:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:20,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:20,797 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:20,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 12:10:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:20,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:20,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:20,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:20,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064604306] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:20,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:20,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741794754] [2024-10-13 12:10:20,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:20,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:20,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:20,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 62 [2024-10-13 12:10:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 167 flow. Second operand has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 62 [2024-10-13 12:10:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:21,023 INFO L124 PetriNetUnfolderBase]: 548/1223 cut-off events. [2024-10-13 12:10:21,023 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 12:10:21,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1223 events. 548/1223 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7076 event pairs, 468 based on Foata normal form. 4/1169 useless extension candidates. Maximal degree in co-relation 2155. Up to 865 conditions per place. [2024-10-13 12:10:21,030 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 31 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-10-13 12:10:21,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 262 flow [2024-10-13 12:10:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-10-13 12:10:21,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060483870967742 [2024-10-13 12:10:21,032 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 167 flow. Second operand 8 states and 251 transitions. [2024-10-13 12:10:21,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 262 flow [2024-10-13 12:10:21,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 244 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-13 12:10:21,035 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 179 flow [2024-10-13 12:10:21,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=179, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-10-13 12:10:21,036 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-10-13 12:10:21,036 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 179 flow [2024-10-13 12:10:21,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:21,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:21,037 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:21,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 12:10:21,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:21,238 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:21,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash -734801939, now seen corresponding path program 2 times [2024-10-13 12:10:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044205008] [2024-10-13 12:10:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:21,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044205008] [2024-10-13 12:10:21,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044205008] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:21,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:21,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:21,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691389669] [2024-10-13 12:10:21,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:21,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:21,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:21,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-10-13 12:10:21,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:21,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:21,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-10-13 12:10:21,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:21,760 INFO L124 PetriNetUnfolderBase]: 700/1799 cut-off events. [2024-10-13 12:10:21,760 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-13 12:10:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 1799 events. 700/1799 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12688 event pairs, 468 based on Foata normal form. 33/1741 useless extension candidates. Maximal degree in co-relation 3004. Up to 877 conditions per place. [2024-10-13 12:10:21,772 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 59 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-10-13 12:10:21,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 373 flow [2024-10-13 12:10:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-10-13 12:10:21,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5935483870967742 [2024-10-13 12:10:21,774 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 179 flow. Second operand 5 states and 184 transitions. [2024-10-13 12:10:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 373 flow [2024-10-13 12:10:21,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:10:21,778 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 198 flow [2024-10-13 12:10:21,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-10-13 12:10:21,779 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-10-13 12:10:21,779 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 198 flow [2024-10-13 12:10:21,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:21,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:21,779 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2024-10-13 12:10:21,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:10:21,780 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-10-13 12:10:21,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash -185967053, now seen corresponding path program 1 times [2024-10-13 12:10:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:21,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63073944] [2024-10-13 12:10:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:21,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:21,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:21,833 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:21,833 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-10-13 12:10:21,834 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-10-13 12:10:21,834 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-10-13 12:10:21,834 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-10-13 12:10:21,835 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-10-13 12:10:21,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:10:21,836 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-13 12:10:21,836 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:21,836 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:10:21,870 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:21,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 87 transitions, 192 flow [2024-10-13 12:10:21,885 INFO L124 PetriNetUnfolderBase]: 13/101 cut-off events. [2024-10-13 12:10:21,885 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 12:10:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 13/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2024-10-13 12:10:21,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 87 transitions, 192 flow [2024-10-13 12:10:21,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 87 transitions, 192 flow [2024-10-13 12:10:21,889 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:21,890 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;@7a79c573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:21,890 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-13 12:10:21,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:21,892 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:21,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:21,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:21,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:21,892 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:21,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash 463469, now seen corresponding path program 1 times [2024-10-13 12:10:21,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523166266] [2024-10-13 12:10:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:21,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:21,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523166266] [2024-10-13 12:10:21,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523166266] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:21,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:21,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410270870] [2024-10-13 12:10:21,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:21,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:21,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-10-13 12:10:21,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2024-10-13 12:10:21,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:21,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-10-13 12:10:21,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:23,388 INFO L124 PetriNetUnfolderBase]: 8783/15207 cut-off events. [2024-10-13 12:10:23,389 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-10-13 12:10:23,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27610 conditions, 15207 events. 8783/15207 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114914 event pairs, 7668 based on Foata normal form. 2972/17545 useless extension candidates. Maximal degree in co-relation 2768. Up to 11966 conditions per place. [2024-10-13 12:10:23,508 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 38 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2024-10-13 12:10:23,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 238 flow [2024-10-13 12:10:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-10-13 12:10:23,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708812260536399 [2024-10-13 12:10:23,511 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 192 flow. Second operand 3 states and 149 transitions. [2024-10-13 12:10:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 238 flow [2024-10-13 12:10:23,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 236 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-13 12:10:23,513 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 160 flow [2024-10-13 12:10:23,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-10-13 12:10:23,514 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2024-10-13 12:10:23,515 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 160 flow [2024-10-13 12:10:23,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2024-10-13 12:10:23,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:23,515 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:23,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:10:23,516 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:23,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash 463470, now seen corresponding path program 1 times [2024-10-13 12:10:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:23,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205499516] [2024-10-13 12:10:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:23,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205499516] [2024-10-13 12:10:23,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205499516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:23,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:23,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814756269] [2024-10-13 12:10:23,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:23,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:23,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:23,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:23,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:23,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:24,941 INFO L124 PetriNetUnfolderBase]: 8783/15209 cut-off events. [2024-10-13 12:10:24,941 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-10-13 12:10:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27517 conditions, 15209 events. 8783/15209 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114903 event pairs, 7668 based on Foata normal form. 0/14574 useless extension candidates. Maximal degree in co-relation 27508. Up to 11968 conditions per place. [2024-10-13 12:10:25,054 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 40 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-10-13 12:10:25,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 248 flow [2024-10-13 12:10:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-10-13 12:10:25,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5823754789272031 [2024-10-13 12:10:25,056 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 160 flow. Second operand 3 states and 152 transitions. [2024-10-13 12:10:25,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 248 flow [2024-10-13 12:10:25,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:25,059 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 173 flow [2024-10-13 12:10:25,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-10-13 12:10:25,060 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2024-10-13 12:10:25,060 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 173 flow [2024-10-13 12:10:25,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:25,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:25,061 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:10:25,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 12:10:25,061 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:25,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash 445409353, now seen corresponding path program 1 times [2024-10-13 12:10:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118964010] [2024-10-13 12:10:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:25,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:25,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118964010] [2024-10-13 12:10:25,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118964010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:25,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496031059] [2024-10-13 12:10:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:25,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:10:25,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 12:10:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:25,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:10:25,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:25,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496031059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:25,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-13 12:10:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988582046] [2024-10-13 12:10:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:25,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:10:25,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:25,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:25,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:25,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:25,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:26,940 INFO L124 PetriNetUnfolderBase]: 8785/15217 cut-off events. [2024-10-13 12:10:26,941 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-10-13 12:10:26,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 15217 events. 8785/15217 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114948 event pairs, 7668 based on Foata normal form. 1/14584 useless extension candidates. Maximal degree in co-relation 27534. Up to 11970 conditions per place. [2024-10-13 12:10:27,014 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 43 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-10-13 12:10:27,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 301 flow [2024-10-13 12:10:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 270 transitions. [2024-10-13 12:10:27,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-10-13 12:10:27,016 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 173 flow. Second operand 6 states and 270 transitions. [2024-10-13 12:10:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 301 flow [2024-10-13 12:10:27,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:27,019 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 223 flow [2024-10-13 12:10:27,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-10-13 12:10:27,019 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2024-10-13 12:10:27,020 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 223 flow [2024-10-13 12:10:27,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:27,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:27,020 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:27,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 12:10:27,224 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 [2024-10-13 12:10:27,225 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:27,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -892975008, now seen corresponding path program 1 times [2024-10-13 12:10:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:27,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945561317] [2024-10-13 12:10:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:27,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:27,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945561317] [2024-10-13 12:10:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945561317] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453726884] [2024-10-13 12:10:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:27,281 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) [2024-10-13 12:10:27,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 12:10:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:27,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:10:27,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:27,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453726884] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:27,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:10:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272260236] [2024-10-13 12:10:27,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:27,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:10:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:10:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:10:27,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-10-13 12:10:27,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 223 flow. Second operand has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:27,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:27,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-10-13 12:10:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:28,855 INFO L124 PetriNetUnfolderBase]: 8783/15219 cut-off events. [2024-10-13 12:10:28,855 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-13 12:10:28,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 15219 events. 8783/15219 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114922 event pairs, 7668 based on Foata normal form. 4/14590 useless extension candidates. Maximal degree in co-relation 27551. Up to 11965 conditions per place. [2024-10-13 12:10:28,952 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 42 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-10-13 12:10:28,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 327 flow [2024-10-13 12:10:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 350 transitions. [2024-10-13 12:10:28,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028735632183908 [2024-10-13 12:10:28,954 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 223 flow. Second operand 8 states and 350 transitions. [2024-10-13 12:10:28,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 327 flow [2024-10-13 12:10:28,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 319 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:28,957 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 239 flow [2024-10-13 12:10:28,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-10-13 12:10:28,958 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2024-10-13 12:10:28,958 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 239 flow [2024-10-13 12:10:28,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.0) internal successors, (351), 9 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:28,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:28,958 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:10:28,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 12:10:29,162 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 [2024-10-13 12:10:29,163 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:29,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash -933566118, now seen corresponding path program 2 times [2024-10-13 12:10:29,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:29,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288380299] [2024-10-13 12:10:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:29,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288380299] [2024-10-13 12:10:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288380299] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839316500] [2024-10-13 12:10:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:10:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:29,465 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) [2024-10-13 12:10:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 12:10:29,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:10:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:10:29,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:10:29,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:29,690 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:10:29,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839316500] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:29,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:10:29,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-13 12:10:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154635889] [2024-10-13 12:10:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:29,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:10:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:10:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:10:29,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:29,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:29,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:29,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:30,894 INFO L124 PetriNetUnfolderBase]: 8783/15217 cut-off events. [2024-10-13 12:10:30,894 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2024-10-13 12:10:30,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 15217 events. 8783/15217 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 114811 event pairs, 7668 based on Foata normal form. 2/14586 useless extension candidates. Maximal degree in co-relation 27556. Up to 11964 conditions per place. [2024-10-13 12:10:30,964 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-10-13 12:10:30,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 343 flow [2024-10-13 12:10:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:10:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:10:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-10-13 12:10:30,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-10-13 12:10:30,966 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 239 flow. Second operand 8 states and 336 transitions. [2024-10-13 12:10:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 343 flow [2024-10-13 12:10:30,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 80 transitions, 317 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-13 12:10:30,968 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 235 flow [2024-10-13 12:10:30,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=235, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-10-13 12:10:30,968 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-10-13 12:10:30,968 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 235 flow [2024-10-13 12:10:30,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:30,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:30,969 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:30,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 12:10:31,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:10:31,173 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:31,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1945793356, now seen corresponding path program 2 times [2024-10-13 12:10:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:31,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818386982] [2024-10-13 12:10:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:31,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:31,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818386982] [2024-10-13 12:10:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818386982] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:31,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:31,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:31,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760559397] [2024-10-13 12:10:31,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:31,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:31,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:31,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:31,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:31,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:31,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:31,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:33,139 INFO L124 PetriNetUnfolderBase]: 11305/22128 cut-off events. [2024-10-13 12:10:33,139 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2024-10-13 12:10:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 22128 events. 11305/22128 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 202519 event pairs, 7668 based on Foata normal form. 333/21380 useless extension candidates. Maximal degree in co-relation 38160. Up to 11977 conditions per place. [2024-10-13 12:10:33,286 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 92 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2024-10-13 12:10:33,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 549 flow [2024-10-13 12:10:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 272 transitions. [2024-10-13 12:10:33,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6252873563218391 [2024-10-13 12:10:33,288 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 235 flow. Second operand 5 states and 272 transitions. [2024-10-13 12:10:33,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 549 flow [2024-10-13 12:10:33,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 535 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-10-13 12:10:33,291 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 248 flow [2024-10-13 12:10:33,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-10-13 12:10:33,291 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2024-10-13 12:10:33,292 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 248 flow [2024-10-13 12:10:33,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:33,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:33,292 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:33,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 12:10:33,292 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:33,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1102395577, now seen corresponding path program 1 times [2024-10-13 12:10:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630006933] [2024-10-13 12:10:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-13 12:10:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630006933] [2024-10-13 12:10:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630006933] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268779416] [2024-10-13 12:10:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:33,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:10:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:10:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:10:33,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:33,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:33,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:33,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:33,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:35,875 INFO L124 PetriNetUnfolderBase]: 13517/26657 cut-off events. [2024-10-13 12:10:35,875 INFO L125 PetriNetUnfolderBase]: For 5680/6088 co-relation queries the response was YES. [2024-10-13 12:10:35,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49764 conditions, 26657 events. 13517/26657 cut-off events. For 5680/6088 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 250374 event pairs, 9268 based on Foata normal form. 396/25814 useless extension candidates. Maximal degree in co-relation 49746. Up to 14369 conditions per place. [2024-10-13 12:10:36,239 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 96 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-10-13 12:10:36,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 600 flow [2024-10-13 12:10:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:10:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:10:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2024-10-13 12:10:36,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-10-13 12:10:36,240 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 248 flow. Second operand 5 states and 270 transitions. [2024-10-13 12:10:36,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 600 flow [2024-10-13 12:10:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:36,244 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 274 flow [2024-10-13 12:10:36,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-10-13 12:10:36,245 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2024-10-13 12:10:36,245 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 274 flow [2024-10-13 12:10:36,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:36,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:36,245 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:36,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 12:10:36,245 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:36,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2043221292, now seen corresponding path program 1 times [2024-10-13 12:10:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:36,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065926702] [2024-10-13 12:10:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:36,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065926702] [2024-10-13 12:10:36,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065926702] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:10:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797110446] [2024-10-13 12:10:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:10:36,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:10:36,517 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) [2024-10-13 12:10:36,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 12:10:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:36,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:10:36,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:10:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:36,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:10:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797110446] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:10:36,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:10:36,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-13 12:10:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848280776] [2024-10-13 12:10:36,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:10:36,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 12:10:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 12:10:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 12:10:37,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:37,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 274 flow. Second operand has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:37,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:37,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:37,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:40,914 INFO L124 PetriNetUnfolderBase]: 22172/42680 cut-off events. [2024-10-13 12:10:40,915 INFO L125 PetriNetUnfolderBase]: For 12921/13515 co-relation queries the response was YES. [2024-10-13 12:10:41,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85953 conditions, 42680 events. 22172/42680 cut-off events. For 12921/13515 co-relation queries the response was YES. Maximal size of possible extension queue 1458. Compared 419597 event pairs, 8638 based on Foata normal form. 399/41927 useless extension candidates. Maximal degree in co-relation 85932. Up to 14756 conditions per place. [2024-10-13 12:10:41,233 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 131 selfloop transitions, 7 changer transitions 0/168 dead transitions. [2024-10-13 12:10:41,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 168 transitions, 816 flow [2024-10-13 12:10:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:10:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:10:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2024-10-13 12:10:41,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6513409961685823 [2024-10-13 12:10:41,235 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 274 flow. Second operand 6 states and 340 transitions. [2024-10-13 12:10:41,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 168 transitions, 816 flow [2024-10-13 12:10:41,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 815 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:10:41,249 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 314 flow [2024-10-13 12:10:41,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-10-13 12:10:41,249 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-10-13 12:10:41,250 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 314 flow [2024-10-13 12:10:41,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:41,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:41,250 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:41,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 12:10:41,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-13 12:10:41,451 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:41,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:41,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1084629011, now seen corresponding path program 1 times [2024-10-13 12:10:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:41,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018439682] [2024-10-13 12:10:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 12:10:41,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018439682] [2024-10-13 12:10:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018439682] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:41,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:41,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:10:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562663502] [2024-10-13 12:10:41,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:41,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:41,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:41,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-10-13 12:10:41,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:41,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:41,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-10-13 12:10:41,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:44,967 INFO L124 PetriNetUnfolderBase]: 21128/37365 cut-off events. [2024-10-13 12:10:44,967 INFO L125 PetriNetUnfolderBase]: For 15722/16325 co-relation queries the response was YES. [2024-10-13 12:10:45,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84046 conditions, 37365 events. 21128/37365 cut-off events. For 15722/16325 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 327423 event pairs, 2500 based on Foata normal form. 1197/37565 useless extension candidates. Maximal degree in co-relation 84022. Up to 24777 conditions per place. [2024-10-13 12:10:45,270 INFO L140 encePairwiseOnDemand]: 84/87 looper letters, 76 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-13 12:10:45,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 109 transitions, 550 flow [2024-10-13 12:10:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:10:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:10:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-10-13 12:10:45,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6628352490421456 [2024-10-13 12:10:45,272 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 314 flow. Second operand 3 states and 173 transitions. [2024-10-13 12:10:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 109 transitions, 550 flow [2024-10-13 12:10:45,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:10:45,292 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 315 flow [2024-10-13 12:10:45,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2024-10-13 12:10:45,292 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2024-10-13 12:10:45,292 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 315 flow [2024-10-13 12:10:45,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:45,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:45,293 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:45,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 12:10:45,293 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-10-13 12:10:45,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash 287831253, now seen corresponding path program 1 times [2024-10-13 12:10:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:45,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088524586] [2024-10-13 12:10:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:45,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:10:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:10:45,337 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:10:45,338 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-13 12:10:45,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-10-13 12:10:45,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-13 12:10:45,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-13 12:10:45,340 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:10:45,342 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:10:45,342 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 12:10:45,370 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:10:45,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 252 flow [2024-10-13 12:10:45,379 INFO L124 PetriNetUnfolderBase]: 17/131 cut-off events. [2024-10-13 12:10:45,380 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:10:45,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 131 events. 17/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 477 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 109. Up to 5 conditions per place. [2024-10-13 12:10:45,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 112 transitions, 252 flow [2024-10-13 12:10:45,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 252 flow [2024-10-13 12:10:45,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:10:45,385 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;@7a79c573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:10:45,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-13 12:10:45,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:10:45,386 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:10:45,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:10:45,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:10:45,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:10:45,386 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-13 12:10:45,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:10:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash 574685, now seen corresponding path program 1 times [2024-10-13 12:10:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:10:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501828848] [2024-10-13 12:10:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:10:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:10:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:10:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:10:45,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:10:45,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501828848] [2024-10-13 12:10:45,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501828848] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:10:45,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:10:45,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:10:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531355507] [2024-10-13 12:10:45,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:10:45,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:10:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:10:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:10:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:10:45,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 112 [2024-10-13 12:10:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:10:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:10:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 112 [2024-10-13 12:10:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:10:59,890 INFO L124 PetriNetUnfolderBase]: 120998/183954 cut-off events. [2024-10-13 12:10:59,890 INFO L125 PetriNetUnfolderBase]: For 12412/12412 co-relation queries the response was YES. [2024-10-13 12:11:00,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342358 conditions, 183954 events. 120998/183954 cut-off events. For 12412/12412 co-relation queries the response was YES. Maximal size of possible extension queue 5211. Compared 1584113 event pairs, 106668 based on Foata normal form. 42805/220364 useless extension candidates. Maximal degree in co-relation 27715. Up to 152966 conditions per place. [2024-10-13 12:11:01,259 INFO L140 encePairwiseOnDemand]: 97/112 looper letters, 49 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2024-10-13 12:11:01,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 312 flow [2024-10-13 12:11:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:11:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:11:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2024-10-13 12:11:01,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-10-13 12:11:01,261 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 252 flow. Second operand 3 states and 193 transitions. [2024-10-13 12:11:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 312 flow [2024-10-13 12:11:01,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 306 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-13 12:11:01,268 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 208 flow [2024-10-13 12:11:01,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2024-10-13 12:11:01,269 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -10 predicate places. [2024-10-13 12:11:01,269 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 208 flow [2024-10-13 12:11:01,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:11:01,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:11:01,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:11:01,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-13 12:11:01,270 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-10-13 12:11:01,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:11:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 574686, now seen corresponding path program 1 times [2024-10-13 12:11:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:11:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892317281] [2024-10-13 12:11:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:11:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:11:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:11:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:11:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892317281] [2024-10-13 12:11:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892317281] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:11:01,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:11:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:11:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668803623] [2024-10-13 12:11:01,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:11:01,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:11:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:11:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:11:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:11:01,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2024-10-13 12:11:01,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:11:01,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:11:01,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2024-10-13 12:11:01,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand