./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:16:06,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:16:06,751 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:16:06,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:16:06,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:16:06,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:16:06,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:16:06,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:16:06,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:16:06,788 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:16:06,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:16:06,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:16:06,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:16:06,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:16:06,792 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:16:06,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:16:06,793 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:16:06,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:16:06,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:16:06,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:16:06,794 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:16:06,798 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:16:06,798 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:16:06,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:16:06,799 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:16:06,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:16:06,799 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:16:06,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:16:06,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:16:06,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:16:06,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:16:06,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:16:06,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:16:06,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:06,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:16:06,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:16:06,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:16:06,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:16:06,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:16:06,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:16:06,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:16:06,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:16:06,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2024-10-24 19:16:07,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:16:07,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:16:07,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:16:07,099 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:16:07,099 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:16:07,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-10-24 19:16:08,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:16:08,700 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:16:08,701 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-10-24 19:16:08,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b33be211/e7bb6e34c6ff4491835c9ad523648151/FLAGa7b28c72a [2024-10-24 19:16:09,103 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b33be211/e7bb6e34c6ff4491835c9ad523648151 [2024-10-24 19:16:09,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:16:09,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:16:09,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:09,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:16:09,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:16:09,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e281b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09, skipping insertion in model container [2024-10-24 19:16:09,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,147 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:09,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:09,393 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:16:09,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:09,448 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:16:09,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09 WrapperNode [2024-10-24 19:16:09,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:09,450 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:09,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:16:09,450 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:16:09,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,508 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 605 [2024-10-24 19:16:09,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:09,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:16:09,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:16:09,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:16:09,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,549 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-24 19:16:09,549 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,549 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:16:09,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:16:09,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:16:09,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:16:09,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (1/1) ... [2024-10-24 19:16:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:09,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:16:09,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:16:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:16:09,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:16:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:16:09,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:16:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:16:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:16:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:16:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:16:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:16:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:16:09,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:16:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:16:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:16:09,687 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:16:09,825 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:16:09,826 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:16:10,795 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:16:10,795 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:16:11,479 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:16:11,480 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 19:16:11,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:11 BoogieIcfgContainer [2024-10-24 19:16:11,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:16:11,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:16:11,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:16:11,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:16:11,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:16:09" (1/3) ... [2024-10-24 19:16:11,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46103bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:11, skipping insertion in model container [2024-10-24 19:16:11,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:09" (2/3) ... [2024-10-24 19:16:11,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46103bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:11, skipping insertion in model container [2024-10-24 19:16:11,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:11" (3/3) ... [2024-10-24 19:16:11,491 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2024-10-24 19:16:11,509 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:16:11,509 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-10-24 19:16:11,510 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:16:11,628 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:16:11,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2024-10-24 19:16:11,739 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2024-10-24 19:16:11,739 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:16:11,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 30/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 705 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-10-24 19:16:11,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2024-10-24 19:16:11,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2024-10-24 19:16:11,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:16:11,781 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;@37dede89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:16:11,782 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-10-24 19:16:11,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:16:11,787 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:16:11,787 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:16:11,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:11,788 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:11,789 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-10-24 19:16:11,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1898607, now seen corresponding path program 1 times [2024-10-24 19:16:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669747148] [2024-10-24 19:16:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669747148] [2024-10-24 19:16:12,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669747148] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:12,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:12,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:16:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728973492] [2024-10-24 19:16:12,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:12,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:16:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:16:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:16:12,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:12,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:12,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:12,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:12,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:20,845 INFO L124 PetriNetUnfolderBase]: 49592/89310 cut-off events. [2024-10-24 19:16:20,845 INFO L125 PetriNetUnfolderBase]: For 1203/1203 co-relation queries the response was YES. [2024-10-24 19:16:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153743 conditions, 89310 events. 49592/89310 cut-off events. For 1203/1203 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 852846 event pairs, 29501 based on Foata normal form. 1/71582 useless extension candidates. Maximal degree in co-relation 150436. Up to 63484 conditions per place. [2024-10-24 19:16:21,533 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2024-10-24 19:16:21,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2024-10-24 19:16:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-10-24 19:16:21,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-10-24 19:16:21,549 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2024-10-24 19:16:21,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2024-10-24 19:16:21,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:16:21,575 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2024-10-24 19:16:21,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-10-24 19:16:21,581 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2024-10-24 19:16:21,581 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2024-10-24 19:16:21,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:21,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:21,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:21,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:16:21,582 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-10-24 19:16:21,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1898608, now seen corresponding path program 1 times [2024-10-24 19:16:21,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:21,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536574568] [2024-10-24 19:16:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:21,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536574568] [2024-10-24 19:16:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536574568] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:21,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:16:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212427128] [2024-10-24 19:16:21,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:21,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:16:21,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:16:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:16:21,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:22,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:22,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:22,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:22,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:28,440 INFO L124 PetriNetUnfolderBase]: 49592/89316 cut-off events. [2024-10-24 19:16:28,440 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-10-24 19:16:28,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153134 conditions, 89316 events. 49592/89316 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 852855 event pairs, 29501 based on Foata normal form. 1/71586 useless extension candidates. Maximal degree in co-relation 153091. Up to 63496 conditions per place. [2024-10-24 19:16:29,014 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 89 selfloop transitions, 6 changer transitions 0/180 dead transitions. [2024-10-24 19:16:29,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 180 transitions, 560 flow [2024-10-24 19:16:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-10-24 19:16:29,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2024-10-24 19:16:29,022 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2024-10-24 19:16:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 180 transitions, 560 flow [2024-10-24 19:16:29,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 180 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:29,029 INFO L231 Difference]: Finished difference. Result has 154 places, 177 transitions, 392 flow [2024-10-24 19:16:29,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=154, PETRI_TRANSITIONS=177} [2024-10-24 19:16:29,030 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -8 predicate places. [2024-10-24 19:16:29,030 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 177 transitions, 392 flow [2024-10-24 19:16:29,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:29,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:29,031 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:16:29,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:16:29,031 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-10-24 19:16:29,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1824625386, now seen corresponding path program 1 times [2024-10-24 19:16:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664775547] [2024-10-24 19:16:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:29,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664775547] [2024-10-24 19:16:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664775547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472894501] [2024-10-24 19:16:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:29,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:29,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:16:29,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:16:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:29,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:16:29,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:29,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-24 19:16:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:29,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:29,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472894501] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:29,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:29,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 19:16:29,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585006063] [2024-10-24 19:16:29,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:29,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:16:29,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:16:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:16:29,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 177 transitions, 392 flow. Second operand has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:37,020 INFO L124 PetriNetUnfolderBase]: 49598/89340 cut-off events. [2024-10-24 19:16:37,020 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-10-24 19:16:37,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153212 conditions, 89340 events. 49598/89340 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 852773 event pairs, 29501 based on Foata normal form. 3/71614 useless extension candidates. Maximal degree in co-relation 153123. Up to 63498 conditions per place. [2024-10-24 19:16:37,459 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-10-24 19:16:37,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 204 transitions, 718 flow [2024-10-24 19:16:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:16:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:16:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2024-10-24 19:16:37,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6120071684587813 [2024-10-24 19:16:37,462 INFO L175 Difference]: Start difference. First operand has 154 places, 177 transitions, 392 flow. Second operand 6 states and 683 transitions. [2024-10-24 19:16:37,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 204 transitions, 718 flow [2024-10-24 19:16:37,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 204 transitions, 708 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:16:37,467 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2024-10-24 19:16:37,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-10-24 19:16:37,468 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2024-10-24 19:16:37,468 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2024-10-24 19:16:37,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:37,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:37,469 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:16:37,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:16:37,673 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 [2024-10-24 19:16:37,674 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-10-24 19:16:37,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1428790104, now seen corresponding path program 2 times [2024-10-24 19:16:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904907507] [2024-10-24 19:16:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:38,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904907507] [2024-10-24 19:16:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904907507] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569855820] [2024-10-24 19:16:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:16:38,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:38,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:16:38,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:16:38,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:16:38,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:16:38,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:16:38,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:38,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:16:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:38,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:38,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569855820] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:38,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:38,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-24 19:16:38,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840100215] [2024-10-24 19:16:38,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:38,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:16:38,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:38,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:16:38,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:16:39,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:39,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 538 flow. Second operand has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:39,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:39,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:39,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:47,817 INFO L124 PetriNetUnfolderBase]: 49592/89340 cut-off events. [2024-10-24 19:16:47,817 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-10-24 19:16:48,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153249 conditions, 89340 events. 49592/89340 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 852910 event pairs, 29501 based on Foata normal form. 12/71626 useless extension candidates. Maximal degree in co-relation 153121. Up to 63496 conditions per place. [2024-10-24 19:16:48,371 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 101 selfloop transitions, 18 changer transitions 0/204 dead transitions. [2024-10-24 19:16:48,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 782 flow [2024-10-24 19:16:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:16:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:16:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2024-10-24 19:16:48,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-10-24 19:16:48,374 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 7 states and 775 transitions. [2024-10-24 19:16:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 782 flow [2024-10-24 19:16:48,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 204 transitions, 758 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-24 19:16:48,380 INFO L231 Difference]: Finished difference. Result has 167 places, 189 transitions, 546 flow [2024-10-24 19:16:48,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=167, PETRI_TRANSITIONS=189} [2024-10-24 19:16:48,381 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 5 predicate places. [2024-10-24 19:16:48,381 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 189 transitions, 546 flow [2024-10-24 19:16:48,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:48,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:48,383 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-10-24 19:16:48,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:16:48,587 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 [2024-10-24 19:16:48,588 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-10-24 19:16:48,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1322181678, now seen corresponding path program 3 times [2024-10-24 19:16:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:48,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237032095] [2024-10-24 19:16:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:48,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:48,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237032095] [2024-10-24 19:16:48,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237032095] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:48,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078139216] [2024-10-24 19:16:48,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:16:48,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:48,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:16:48,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:16:48,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 19:16:48,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:16:48,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:16:48,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:48,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 19:16:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 19:16:49,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 19:16:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078139216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:49,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:49,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-10-24 19:16:49,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927799149] [2024-10-24 19:16:49,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:49,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:16:49,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:16:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:16:49,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:49,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 189 transitions, 546 flow. Second operand has 14 states, 14 states have (on average 93.78571428571429) internal successors, (1313), 14 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:49,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:49,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:49,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand