./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 0.3.0-?-c00e63d-m [2025-02-06 13:02:21,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:02:21,552 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:02:21,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:02:21,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:02:21,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:02:21,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:02:21,587 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:02:21,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:02:21,588 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:02:21,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:02:21,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:02:21,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:02:21,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:02:21,590 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:02:21,591 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:02:21,591 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:21,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:02:21,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:02:21,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:02:21,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:02:21,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:02:21,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:02:21,593 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 [2025-02-06 13:02:21,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:02:21,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:02:21,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:02:21,832 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:02:21,832 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:02:21,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-02-06 13:02:22,977 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e4854a1fe/71904b931e8c422291818547ea1ee09a/FLAGceb4ef1f5 [2025-02-06 13:02:23,278 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:02:23,281 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-02-06 13:02:23,289 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e4854a1fe/71904b931e8c422291818547ea1ee09a/FLAGceb4ef1f5 [2025-02-06 13:02:23,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e4854a1fe/71904b931e8c422291818547ea1ee09a [2025-02-06 13:02:23,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:02:23,306 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:02:23,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:23,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:02:23,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:02:23,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3f9e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23, skipping insertion in model container [2025-02-06 13:02:23,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,327 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:02:23,484 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:02:23,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:23,498 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:02:23,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:02:23,546 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:02:23,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23 WrapperNode [2025-02-06 13:02:23,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:02:23,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:23,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:02:23,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:02:23,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,608 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 593 [2025-02-06 13:02:23,608 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:02:23,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:02:23,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:02:23,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:02:23,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,651 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]. [2025-02-06 13:02:23,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,671 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,679 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:02:23,686 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:02:23,686 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:02:23,687 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:02:23,687 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (1/1) ... [2025-02-06 13:02:23,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:02:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:23,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:02:23,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:02:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:02:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:02:23,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:02:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:02:23,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:02:23,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:02:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:02:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:02:23,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:02:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:02:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:02:23,741 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:02:23,834 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:02:23,835 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:02:24,422 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:02:24,422 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:02:24,903 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:02:24,904 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:02:24,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:24 BoogieIcfgContainer [2025-02-06 13:02:24,904 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:02:24,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:02:24,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:02:24,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:02:24,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:02:23" (1/3) ... [2025-02-06 13:02:24,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189dadbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:24, skipping insertion in model container [2025-02-06 13:02:24,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:02:23" (2/3) ... [2025-02-06 13:02:24,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189dadbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:02:24, skipping insertion in model container [2025-02-06 13:02:24,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:02:24" (3/3) ... [2025-02-06 13:02:24,911 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2025-02-06 13:02:24,921 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:02:24,922 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-subst.wvr.c that has 4 procedures, 157 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2025-02-06 13:02:24,922 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:02:25,020 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:02:25,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2025-02-06 13:02:25,116 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2025-02-06 13:02:25,118 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:02:25,123 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 724 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. [2025-02-06 13:02:25,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2025-02-06 13:02:25,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2025-02-06 13:02:25,131 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:02:25,139 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;@1117ff91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:02:25,142 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2025-02-06 13:02:25,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:02:25,150 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:02:25,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:02:25,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:25,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:25,151 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-06 13:02:25,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1702794, now seen corresponding path program 1 times [2025-02-06 13:02:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:25,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427159391] [2025-02-06 13:02:25,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:25,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:25,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:25,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:25,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:25,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:25,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427159391] [2025-02-06 13:02:25,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427159391] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:25,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:25,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:02:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042417594] [2025-02-06 13:02:25,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:25,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:25,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:25,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:25,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-02-06 13:02:25,548 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) [2025-02-06 13:02:25,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:25,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-02-06 13:02:25,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:31,102 INFO L124 PetriNetUnfolderBase]: 49598/89287 cut-off events. [2025-02-06 13:02:31,102 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2025-02-06 13:02:31,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153712 conditions, 89287 events. 49598/89287 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849617 event pairs, 29352 based on Foata normal form. 1/71865 useless extension candidates. Maximal degree in co-relation 150410. Up to 63479 conditions per place. [2025-02-06 13:02:31,562 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2025-02-06 13:02:31,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2025-02-06 13:02:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2025-02-06 13:02:31,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2025-02-06 13:02:31,577 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2025-02-06 13:02:31,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2025-02-06 13:02:31,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:02:31,592 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2025-02-06 13:02:31,593 INFO L262 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} [2025-02-06 13:02:31,597 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2025-02-06 13:02:31,597 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2025-02-06 13:02:31,597 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) [2025-02-06 13:02:31,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:31,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:02:31,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:02:31,598 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-06 13:02:31,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1702795, now seen corresponding path program 1 times [2025-02-06 13:02:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:31,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177527081] [2025-02-06 13:02:31,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:31,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:31,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:02:31,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:02:31,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:31,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:31,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177527081] [2025-02-06 13:02:31,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177527081] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:31,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:31,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:02:31,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478420989] [2025-02-06 13:02:31,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:31,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:02:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:31,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:02:31,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:02:31,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-02-06 13:02:31,921 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) [2025-02-06 13:02:31,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:31,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-02-06 13:02:31,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:36,761 INFO L124 PetriNetUnfolderBase]: 49601/89296 cut-off events. [2025-02-06 13:02:36,762 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2025-02-06 13:02:36,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153112 conditions, 89296 events. 49601/89296 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849680 event pairs, 29352 based on Foata normal form. 0/71869 useless extension candidates. Maximal degree in co-relation 153062. Up to 63492 conditions per place. [2025-02-06 13:02:37,257 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2025-02-06 13:02:37,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2025-02-06 13:02:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2025-02-06 13:02:37,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2025-02-06 13:02:37,263 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2025-02-06 13:02:37,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2025-02-06 13:02:37,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:37,269 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2025-02-06 13:02:37,270 INFO L262 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2025-02-06 13:02:37,270 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2025-02-06 13:02:37,270 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2025-02-06 13:02:37,271 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) [2025-02-06 13:02:37,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:37,271 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:02:37,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:02:37,271 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-06 13:02:37,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1636435870, now seen corresponding path program 1 times [2025-02-06 13:02:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761307212] [2025-02-06 13:02:37,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:37,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:37,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:37,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:37,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:37,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761307212] [2025-02-06 13:02:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761307212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501945830] [2025-02-06 13:02:37,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:37,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:37,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:02:37,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:02:37,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:02:37,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:37,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:37,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 13:02:37,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:37,651 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 [2025-02-06 13:02:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:37,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501945830] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:37,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:37,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-06 13:02:37,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147689471] [2025-02-06 13:02:37,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:37,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:02:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:37,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:02:37,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:02:38,051 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-02-06 13:02:38,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 412 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) [2025-02-06 13:02:38,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:38,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-02-06 13:02:38,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:43,050 INFO L124 PetriNetUnfolderBase]: 49610/89323 cut-off events. [2025-02-06 13:02:43,050 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2025-02-06 13:02:43,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153211 conditions, 89323 events. 49610/89323 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849927 event pairs, 29352 based on Foata normal form. 0/71900 useless extension candidates. Maximal degree in co-relation 153062. Up to 63495 conditions per place. [2025-02-06 13:02:43,415 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 100 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2025-02-06 13:02:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 770 flow [2025-02-06 13:02:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:02:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:02:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2025-02-06 13:02:43,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2025-02-06 13:02:43,418 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2025-02-06 13:02:43,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 770 flow [2025-02-06 13:02:43,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 744 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:02:43,425 INFO L231 Difference]: Finished difference. Result has 161 places, 198 transitions, 573 flow [2025-02-06 13:02:43,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=161, PETRI_TRANSITIONS=198} [2025-02-06 13:02:43,429 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2025-02-06 13:02:43,429 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 198 transitions, 573 flow [2025-02-06 13:02:43,429 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) [2025-02-06 13:02:43,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:43,429 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:02:43,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:02:43,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:43,632 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-06 13:02:43,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1434413843, now seen corresponding path program 1 times [2025-02-06 13:02:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:43,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455686125] [2025-02-06 13:02:43,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:02:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:43,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:02:43,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:02:43,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:02:43,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455686125] [2025-02-06 13:02:43,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455686125] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:02:43,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:02:43,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:02:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952406925] [2025-02-06 13:02:43,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:02:43,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:02:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:43,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:02:43,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:02:43,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2025-02-06 13:02:43,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2025-02-06 13:02:43,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:43,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2025-02-06 13:02:43,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:02:49,216 INFO L124 PetriNetUnfolderBase]: 49607/89320 cut-off events. [2025-02-06 13:02:49,217 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2025-02-06 13:02:49,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153244 conditions, 89320 events. 49607/89320 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 849879 event pairs, 29352 based on Foata normal form. 3/71903 useless extension candidates. Maximal degree in co-relation 153141. Up to 63509 conditions per place. [2025-02-06 13:02:49,696 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 98 selfloop transitions, 12 changer transitions 0/198 dead transitions. [2025-02-06 13:02:49,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 198 transitions, 785 flow [2025-02-06 13:02:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:02:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:02:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2025-02-06 13:02:49,698 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6810035842293907 [2025-02-06 13:02:49,698 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 573 flow. Second operand 3 states and 380 transitions. [2025-02-06 13:02:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 198 transitions, 785 flow [2025-02-06 13:02:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 198 transitions, 749 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-02-06 13:02:49,703 INFO L231 Difference]: Finished difference. Result has 162 places, 195 transitions, 547 flow [2025-02-06 13:02:49,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=547, PETRI_PLACES=162, PETRI_TRANSITIONS=195} [2025-02-06 13:02:49,705 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2025-02-06 13:02:49,705 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 195 transitions, 547 flow [2025-02-06 13:02:49,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2025-02-06 13:02:49,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:02:49,705 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-06 13:02:49,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:02:49,705 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-02-06 13:02:49,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:02:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1074435927, now seen corresponding path program 2 times [2025-02-06 13:02:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:02:49,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629960217] [2025-02-06 13:02:49,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:49,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:02:49,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-06 13:02:49,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:49,734 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:49,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:02:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629960217] [2025-02-06 13:02:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629960217] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:02:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404070757] [2025-02-06 13:02:49,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:02:49,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:02:49,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:02:50,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:02:50,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:02:50,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-06 13:02:50,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:02:50,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:02:50,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:02:50,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 13:02:50,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:02:50,247 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 [2025-02-06 13:02:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:50,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:02:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:02:50,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404070757] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:02:50,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:02:50,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-02-06 13:02:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556046597] [2025-02-06 13:02:50,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:02:50,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 13:02:50,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:02:50,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 13:02:50,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-02-06 13:02:51,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-02-06 13:02:51,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 195 transitions, 547 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) [2025-02-06 13:02:51,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:02:51,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-02-06 13:02:51,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand