./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-subst.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-subst.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 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:16:01,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:16:02,034 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:16:02,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:16:02,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:16:02,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:16:02,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:16:02,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:16:02,076 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:16:02,076 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:16:02,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:16:02,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:16:02,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:16:02,083 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:16:02,083 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:16:02,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:16:02,084 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:16:02,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:16:02,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:16:02,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:16:02,084 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:16:02,087 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:16:02,087 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:16:02,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:16:02,088 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:16:02,088 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:16:02,088 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:16:02,089 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:16:02,089 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:16:02,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:16:02,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:16:02,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:16:02,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:16:02,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:02,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:16:02,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:16:02,091 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:16:02,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:16:02,091 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:16:02,091 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:16:02,092 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:16:02,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:16:02,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2024-10-24 19:16:02,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:16:02,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:16:02,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:16:02,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:16:02,428 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:16:02,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-10-24 19:16:03,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:16:04,077 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:16:04,078 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-10-24 19:16:04,091 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c93c5e2/3d88368a4ce3465f91e0462547799959/FLAG033c8e8df [2024-10-24 19:16:04,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c93c5e2/3d88368a4ce3465f91e0462547799959 [2024-10-24 19:16:04,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:16:04,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:16:04,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:04,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:16:04,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:16:04,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e9f444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04, skipping insertion in model container [2024-10-24 19:16:04,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,144 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:04,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:04,448 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:16:04,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:04,526 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:16:04,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04 WrapperNode [2024-10-24 19:16:04,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:04,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:04,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:16:04,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:16:04,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,616 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 605 [2024-10-24 19:16:04,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:04,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:16:04,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:16:04,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:16:04,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,637 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,670 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 19:16:04,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:16:04,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:16:04,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:16:04,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:16:04,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (1/1) ... [2024-10-24 19:16:04,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:04,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:04,756 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 19:16:04,759 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 19:16:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:16:04,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:16:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:16:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:16:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:16:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:16:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:16:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:16:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:16:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:16:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:16:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:16:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:16:04,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:16:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:16:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:16:04,821 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 19:16:05,020 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:16:05,024 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:16:06,054 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:16:06,054 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:16:06,780 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:16:06,781 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 19:16:06,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:06 BoogieIcfgContainer [2024-10-24 19:16:06,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:16:06,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:16:06,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:16:06,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:16:06,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:16:04" (1/3) ... [2024-10-24 19:16:06,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26837d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:06, skipping insertion in model container [2024-10-24 19:16:06,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:04" (2/3) ... [2024-10-24 19:16:06,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26837d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:06, skipping insertion in model container [2024-10-24 19:16:06,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:06" (3/3) ... [2024-10-24 19:16:06,793 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2024-10-24 19:16:06,812 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:16:06,812 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-10-24 19:16:06,813 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:16:06,951 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:16:07,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2024-10-24 19:16:07,078 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2024-10-24 19:16:07,078 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:16:07,084 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 19:16:07,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2024-10-24 19:16:07,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2024-10-24 19:16:07,099 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:16:07,106 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;@8e3d6c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:16:07,106 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-10-24 19:16:07,109 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:16:07,110 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:16:07,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:16:07,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:07,111 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:07,111 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 19:16:07,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1898607, now seen corresponding path program 1 times [2024-10-24 19:16:07,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868667075] [2024-10-24 19:16:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:07,490 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 19:16:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868667075] [2024-10-24 19:16:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868667075] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:07,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:16:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504585304] [2024-10-24 19:16:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:07,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:16:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:16:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:16:07,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:07,591 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 19:16:07,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:07,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:16,059 INFO L124 PetriNetUnfolderBase]: 49592/89310 cut-off events. [2024-10-24 19:16:16,059 INFO L125 PetriNetUnfolderBase]: For 1203/1203 co-relation queries the response was YES. [2024-10-24 19:16:16,278 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 19:16:16,750 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2024-10-24 19:16:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2024-10-24 19:16:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-10-24 19:16:16,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-10-24 19:16:16,765 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2024-10-24 19:16:16,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2024-10-24 19:16:16,778 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 19:16:16,783 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2024-10-24 19:16:16,785 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 19:16:16,790 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2024-10-24 19:16:16,791 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2024-10-24 19:16:16,791 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 19:16:16,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:16,792 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:16,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:16:16,792 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 19:16:16,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1898608, now seen corresponding path program 1 times [2024-10-24 19:16:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298436318] [2024-10-24 19:16:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:17,085 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 19:16:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298436318] [2024-10-24 19:16:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298436318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:17,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:17,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:16:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185274263] [2024-10-24 19:16:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:17,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:16:17,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:17,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:16:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:16:17,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:17,208 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 19:16:17,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:17,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:24,187 INFO L124 PetriNetUnfolderBase]: 49592/89316 cut-off events. [2024-10-24 19:16:24,187 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-10-24 19:16:24,323 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 19:16:24,700 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 89 selfloop transitions, 6 changer transitions 0/180 dead transitions. [2024-10-24 19:16:24,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 180 transitions, 560 flow [2024-10-24 19:16:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-10-24 19:16:24,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2024-10-24 19:16:24,704 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2024-10-24 19:16:24,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 180 transitions, 560 flow [2024-10-24 19:16:24,706 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 19:16:24,711 INFO L231 Difference]: Finished difference. Result has 154 places, 177 transitions, 392 flow [2024-10-24 19:16:24,711 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 19:16:24,712 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -8 predicate places. [2024-10-24 19:16:24,712 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 177 transitions, 392 flow [2024-10-24 19:16:24,713 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 19:16:24,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:24,713 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:16:24,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:16:24,714 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 19:16:24,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1824625386, now seen corresponding path program 1 times [2024-10-24 19:16:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290862757] [2024-10-24 19:16:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:24,942 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 19:16:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290862757] [2024-10-24 19:16:24,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290862757] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454955733] [2024-10-24 19:16:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:24,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:24,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:24,948 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 19:16:24,955 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 19:16:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:25,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:16:25,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:25,154 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 19:16:25,207 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 19:16:25,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:25,280 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 19:16:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454955733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:25,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:25,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 19:16:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403606862] [2024-10-24 19:16:25,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:25,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:16:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:16:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:16:25,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:25,606 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 19:16:25,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:25,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:25,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:32,760 INFO L124 PetriNetUnfolderBase]: 49598/89340 cut-off events. [2024-10-24 19:16:32,760 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-10-24 19:16:32,929 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 19:16:33,303 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-10-24 19:16:33,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 204 transitions, 718 flow [2024-10-24 19:16:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:16:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:16:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2024-10-24 19:16:33,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6120071684587813 [2024-10-24 19:16:33,307 INFO L175 Difference]: Start difference. First operand has 154 places, 177 transitions, 392 flow. Second operand 6 states and 683 transitions. [2024-10-24 19:16:33,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 204 transitions, 718 flow [2024-10-24 19:16:33,310 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 19:16:33,313 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2024-10-24 19:16:33,313 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 19:16:33,314 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2024-10-24 19:16:33,314 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2024-10-24 19:16:33,315 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 19:16:33,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:33,315 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:16:33,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 19:16:33,516 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 19:16:33,517 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 19:16:33,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1428790104, now seen corresponding path program 2 times [2024-10-24 19:16:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:33,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869058337] [2024-10-24 19:16:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:33,951 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 19:16:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:33,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869058337] [2024-10-24 19:16:33,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869058337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:33,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135691683] [2024-10-24 19:16:33,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:16:33,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:33,954 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 19:16:33,956 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 19:16:34,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:16:34,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:16:34,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 19:16:34,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:34,104 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 19:16:34,264 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 19:16:34,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:34,425 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 19:16:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135691683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:34,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-24 19:16:34,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934352204] [2024-10-24 19:16:34,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:34,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:16:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:16:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:16:35,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:35,959 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 19:16:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:35,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:35,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:44,008 INFO L124 PetriNetUnfolderBase]: 49592/89340 cut-off events. [2024-10-24 19:16:44,008 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-10-24 19:16:44,272 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 19:16:44,616 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 101 selfloop transitions, 18 changer transitions 0/204 dead transitions. [2024-10-24 19:16:44,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 782 flow [2024-10-24 19:16:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:16:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:16:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2024-10-24 19:16:44,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-10-24 19:16:44,619 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 7 states and 775 transitions. [2024-10-24 19:16:44,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 782 flow [2024-10-24 19:16:44,623 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 19:16:44,631 INFO L231 Difference]: Finished difference. Result has 167 places, 189 transitions, 546 flow [2024-10-24 19:16:44,631 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 19:16:44,632 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 5 predicate places. [2024-10-24 19:16:44,633 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 189 transitions, 546 flow [2024-10-24 19:16:44,635 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 19:16:44,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:44,635 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-10-24 19:16:44,654 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 19:16:44,836 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 19:16:44,836 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 19:16:44,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1322181678, now seen corresponding path program 3 times [2024-10-24 19:16:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:16:44,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754091419] [2024-10-24 19:16:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:44,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:16:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:44,992 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 19:16:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:16:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754091419] [2024-10-24 19:16:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754091419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:16:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76104712] [2024-10-24 19:16:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:16:44,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:16:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:44,997 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 19:16:44,998 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 19:16:45,107 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 19:16:45,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:16:45,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 19:16:45,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:45,123 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 19:16:45,256 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 19:16:45,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:45,367 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 19:16:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76104712] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:45,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:16:45,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-10-24 19:16:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233680697] [2024-10-24 19:16:45,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:45,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:16:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:16:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:16:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:16:45,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-10-24 19:16:45,755 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 19:16:45,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:45,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-10-24 19:16:45,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand