./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:37:10,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:37:10,676 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:37:10,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:37:10,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:37:10,705 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:37:10,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:37:10,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:37:10,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:37:10,707 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:37:10,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:37:10,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:37:10,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:37:10,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:37:10,709 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:37:10,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:37:10,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:37:10,709 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:37:10,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:37:10,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:37:10,710 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:37:10,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:37:10,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:37:10,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:37:10,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:37:10,712 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/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 ! call(reach_error())) ) 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 -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2025-03-08 17:37:10,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:37:10,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:37:10,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:37:10,941 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:37:10,941 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:37:10,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2025-03-08 17:37:12,056 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923da55c8/b0b367c975074bcea0a5173971063f95/FLAGec39a4ce8 [2025-03-08 17:37:12,263 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:37:12,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2025-03-08 17:37:12,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923da55c8/b0b367c975074bcea0a5173971063f95/FLAGec39a4ce8 [2025-03-08 17:37:12,618 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923da55c8/b0b367c975074bcea0a5173971063f95 [2025-03-08 17:37:12,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:37:12,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:37:12,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:37:12,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:37:12,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:37:12,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efd0336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12, skipping insertion in model container [2025-03-08 17:37:12,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,641 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:37:12,754 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2025-03-08 17:37:12,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:37:12,764 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:37:12,779 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2025-03-08 17:37:12,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:37:12,791 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:37:12,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12 WrapperNode [2025-03-08 17:37:12,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:37:12,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:37:12,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:37:12,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:37:12,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,815 INFO L138 Inliner]: procedures = 22, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 92 [2025-03-08 17:37:12,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:37:12,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:37:12,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:37:12,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:37:12,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,829 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 17:37:12,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,833 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:37:12,837 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:37:12,837 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:37:12,837 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:37:12,838 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (1/1) ... [2025-03-08 17:37:12,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:37:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:12,864 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) [2025-03-08 17:37:12,866 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 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:37:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:37:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:37:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:37:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:37:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:37:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:37:12,886 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:37:12,962 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:37:12,964 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:37:13,166 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:37:13,167 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:37:13,286 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:37:13,287 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:37:13,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:37:13 BoogieIcfgContainer [2025-03-08 17:37:13,287 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:37:13,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:37:13,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:37:13,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:37:13,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:37:12" (1/3) ... [2025-03-08 17:37:13,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120fd34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:37:13, skipping insertion in model container [2025-03-08 17:37:13,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:12" (2/3) ... [2025-03-08 17:37:13,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120fd34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:37:13, skipping insertion in model container [2025-03-08 17:37:13,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:37:13" (3/3) ... [2025-03-08 17:37:13,295 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2025-03-08 17:37:13,306 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:37:13,307 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-mult-4.wvr.c that has 5 procedures, 37 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 17:37:13,307 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:37:13,356 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:37:13,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 40 transitions, 108 flow [2025-03-08 17:37:13,416 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2025-03-08 17:37:13,417 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:37:13,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 36 events. 4/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2025-03-08 17:37:13,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 40 transitions, 108 flow [2025-03-08 17:37:13,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 35 transitions, 94 flow [2025-03-08 17:37:13,431 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:37:13,439 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=LoopHeads, 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;@1aa6fe4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:37:13,439 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:37:13,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:37:13,456 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2025-03-08 17:37:13,456 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:37:13,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:13,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:13,458 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:13,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash -737163647, now seen corresponding path program 1 times [2025-03-08 17:37:13,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612190966] [2025-03-08 17:37:13,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:13,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:13,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:37:13,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:37:13,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:13,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:13,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:13,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612190966] [2025-03-08 17:37:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612190966] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:13,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:37:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65581618] [2025-03-08 17:37:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:13,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:37:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:13,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:37:13,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:37:13,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-03-08 17:37:13,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-08 17:37:13,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:13,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-03-08 17:37:13,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:14,252 INFO L124 PetriNetUnfolderBase]: 3042/4231 cut-off events. [2025-03-08 17:37:14,252 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2025-03-08 17:37:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8631 conditions, 4231 events. 3042/4231 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18749 event pairs, 763 based on Foata normal form. 152/4373 useless extension candidates. Maximal degree in co-relation 7625. Up to 3203 conditions per place. [2025-03-08 17:37:14,277 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 46 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2025-03-08 17:37:14,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 259 flow [2025-03-08 17:37:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:37:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:37:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2025-03-08 17:37:14,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2025-03-08 17:37:14,291 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 94 flow. Second operand 3 states and 81 transitions. [2025-03-08 17:37:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 259 flow [2025-03-08 17:37:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:37:14,303 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2025-03-08 17:37:14,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-03-08 17:37:14,308 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2025-03-08 17:37:14,309 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2025-03-08 17:37:14,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-08 17:37:14,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:14,310 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:14,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:37:14,310 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:14,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 662664604, now seen corresponding path program 1 times [2025-03-08 17:37:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:14,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978726283] [2025-03-08 17:37:14,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:14,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:14,325 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 17:37:14,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:14,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:14,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:14,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978726283] [2025-03-08 17:37:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978726283] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:14,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:37:14,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178566339] [2025-03-08 17:37:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:14,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:37:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:14,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:37:14,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:37:14,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:14,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-03-08 17:37:14,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:14,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:15,376 INFO L124 PetriNetUnfolderBase]: 13495/17583 cut-off events. [2025-03-08 17:37:15,377 INFO L125 PetriNetUnfolderBase]: For 1786/1786 co-relation queries the response was YES. [2025-03-08 17:37:15,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39169 conditions, 17583 events. 13495/17583 cut-off events. For 1786/1786 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 83194 event pairs, 4626 based on Foata normal form. 0/14230 useless extension candidates. Maximal degree in co-relation 7257. Up to 9386 conditions per place. [2025-03-08 17:37:15,451 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2025-03-08 17:37:15,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 107 transitions, 497 flow [2025-03-08 17:37:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:37:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:37:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2025-03-08 17:37:15,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.635 [2025-03-08 17:37:15,454 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 5 states and 127 transitions. [2025-03-08 17:37:15,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 107 transitions, 497 flow [2025-03-08 17:37:15,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 107 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:37:15,457 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 165 flow [2025-03-08 17:37:15,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2025-03-08 17:37:15,458 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2025-03-08 17:37:15,458 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 165 flow [2025-03-08 17:37:15,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-03-08 17:37:15,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:15,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:15,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:37:15,459 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:15,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash -582747302, now seen corresponding path program 2 times [2025-03-08 17:37:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:15,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563421295] [2025-03-08 17:37:15,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:15,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-08 17:37:15,476 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:15,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:15,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:15,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:15,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563421295] [2025-03-08 17:37:15,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563421295] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:15,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:15,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:37:15,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69334318] [2025-03-08 17:37:15,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:15,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:37:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:15,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:37:15,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:37:15,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:15,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:15,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:16,816 INFO L124 PetriNetUnfolderBase]: 20850/27089 cut-off events. [2025-03-08 17:37:16,817 INFO L125 PetriNetUnfolderBase]: For 12295/12295 co-relation queries the response was YES. [2025-03-08 17:37:16,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72903 conditions, 27089 events. 20850/27089 cut-off events. For 12295/12295 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 133744 event pairs, 3494 based on Foata normal form. 760/27849 useless extension candidates. Maximal degree in co-relation 42442. Up to 16632 conditions per place. [2025-03-08 17:37:16,921 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 8 changer transitions 2/104 dead transitions. [2025-03-08 17:37:16,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 104 transitions, 570 flow [2025-03-08 17:37:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:37:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:37:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-03-08 17:37:16,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375 [2025-03-08 17:37:16,923 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 165 flow. Second operand 4 states and 102 transitions. [2025-03-08 17:37:16,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 104 transitions, 570 flow [2025-03-08 17:37:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 104 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:37:16,929 INFO L231 Difference]: Finished difference. Result has 51 places, 54 transitions, 251 flow [2025-03-08 17:37:16,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2025-03-08 17:37:16,930 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2025-03-08 17:37:16,930 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 251 flow [2025-03-08 17:37:16,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:16,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:16,930 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:16,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:37:16,930 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:16,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1510752062, now seen corresponding path program 3 times [2025-03-08 17:37:16,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:16,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441112508] [2025-03-08 17:37:16,931 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:16,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:16,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-08 17:37:16,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:16,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:16,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:17,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:17,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441112508] [2025-03-08 17:37:17,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441112508] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:17,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:17,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:37:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778661176] [2025-03-08 17:37:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:17,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:37:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:17,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:37:17,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:37:17,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:17,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:17,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:17,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:18,360 INFO L124 PetriNetUnfolderBase]: 27113/35301 cut-off events. [2025-03-08 17:37:18,360 INFO L125 PetriNetUnfolderBase]: For 34242/34242 co-relation queries the response was YES. [2025-03-08 17:37:18,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106392 conditions, 35301 events. 27113/35301 cut-off events. For 34242/34242 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 178031 event pairs, 7966 based on Foata normal form. 432/35733 useless extension candidates. Maximal degree in co-relation 39884. Up to 19571 conditions per place. [2025-03-08 17:37:18,539 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 101 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2025-03-08 17:37:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 112 transitions, 688 flow [2025-03-08 17:37:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:37:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:37:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-03-08 17:37:18,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-03-08 17:37:18,540 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 251 flow. Second operand 4 states and 104 transitions. [2025-03-08 17:37:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 112 transitions, 688 flow [2025-03-08 17:37:18,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 112 transitions, 688 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:37:18,555 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 311 flow [2025-03-08 17:37:18,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2025-03-08 17:37:18,555 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2025-03-08 17:37:18,555 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 311 flow [2025-03-08 17:37:18,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:18,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:18,556 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:18,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:37:18,556 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:18,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash -711175366, now seen corresponding path program 1 times [2025-03-08 17:37:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:18,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757375053] [2025-03-08 17:37:18,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:18,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:18,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 17:37:18,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:18,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:18,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757375053] [2025-03-08 17:37:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757375053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:18,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:37:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544215648] [2025-03-08 17:37:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:18,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:37:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:18,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:37:18,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:37:18,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:18,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-03-08 17:37:18,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:18,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:18,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:20,587 INFO L124 PetriNetUnfolderBase]: 28674/37800 cut-off events. [2025-03-08 17:37:20,587 INFO L125 PetriNetUnfolderBase]: For 69313/69313 co-relation queries the response was YES. [2025-03-08 17:37:20,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123754 conditions, 37800 events. 28674/37800 cut-off events. For 69313/69313 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 201268 event pairs, 8683 based on Foata normal form. 778/38578 useless extension candidates. Maximal degree in co-relation 52637. Up to 17888 conditions per place. [2025-03-08 17:37:20,745 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 100 selfloop transitions, 7 changer transitions 18/126 dead transitions. [2025-03-08 17:37:20,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 126 transitions, 886 flow [2025-03-08 17:37:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:37:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:37:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2025-03-08 17:37:20,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-08 17:37:20,747 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 311 flow. Second operand 5 states and 125 transitions. [2025-03-08 17:37:20,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 126 transitions, 886 flow [2025-03-08 17:37:20,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 126 transitions, 821 flow, removed 23 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:20,776 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 325 flow [2025-03-08 17:37:20,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2025-03-08 17:37:20,777 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2025-03-08 17:37:20,777 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 325 flow [2025-03-08 17:37:20,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-03-08 17:37:20,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:20,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:20,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:37:20,778 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:20,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 440488922, now seen corresponding path program 4 times [2025-03-08 17:37:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936155678] [2025-03-08 17:37:20,779 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:20,784 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-08 17:37:20,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:20,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:20,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936155678] [2025-03-08 17:37:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936155678] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442033509] [2025-03-08 17:37:20,874 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:20,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:20,877 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) [2025-03-08 17:37:20,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:37:20,914 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-08 17:37:20,937 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 17:37:20,938 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:20,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:20,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:37:20,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:21,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442033509] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:21,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-03-08 17:37:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604183980] [2025-03-08 17:37:21,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:21,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:37:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:21,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:37:21,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:37:21,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:21,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 325 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 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) [2025-03-08 17:37:21,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:21,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:21,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:23,942 INFO L124 PetriNetUnfolderBase]: 35475/46034 cut-off events. [2025-03-08 17:37:23,943 INFO L125 PetriNetUnfolderBase]: For 98634/98634 co-relation queries the response was YES. [2025-03-08 17:37:24,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161312 conditions, 46034 events. 35475/46034 cut-off events. For 98634/98634 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 232866 event pairs, 974 based on Foata normal form. 3442/49476 useless extension candidates. Maximal degree in co-relation 60609. Up to 10659 conditions per place. [2025-03-08 17:37:24,219 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 328 selfloop transitions, 103 changer transitions 12/444 dead transitions. [2025-03-08 17:37:24,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 444 transitions, 2942 flow [2025-03-08 17:37:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:37:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:37:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 556 transitions. [2025-03-08 17:37:24,221 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6043478260869565 [2025-03-08 17:37:24,221 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 325 flow. Second operand 23 states and 556 transitions. [2025-03-08 17:37:24,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 444 transitions, 2942 flow [2025-03-08 17:37:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 444 transitions, 2798 flow, removed 54 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:24,270 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 1296 flow [2025-03-08 17:37:24,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1296, PETRI_PLACES=97, PETRI_TRANSITIONS=139} [2025-03-08 17:37:24,271 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2025-03-08 17:37:24,271 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 1296 flow [2025-03-08 17:37:24,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 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) [2025-03-08 17:37:24,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:24,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:24,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:24,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 17:37:24,476 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:24,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1435635592, now seen corresponding path program 1 times [2025-03-08 17:37:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104033152] [2025-03-08 17:37:24,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:24,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:37:24,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:37:24,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:24,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104033152] [2025-03-08 17:37:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104033152] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:24,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:24,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:37:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739985605] [2025-03-08 17:37:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:24,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:37:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:24,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:37:24,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:37:24,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:24,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 139 transitions, 1296 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2025-03-08 17:37:24,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:24,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:24,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:29,142 INFO L124 PetriNetUnfolderBase]: 52521/68202 cut-off events. [2025-03-08 17:37:29,142 INFO L125 PetriNetUnfolderBase]: For 564282/564282 co-relation queries the response was YES. [2025-03-08 17:37:29,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334010 conditions, 68202 events. 52521/68202 cut-off events. For 564282/564282 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 356909 event pairs, 18448 based on Foata normal form. 1018/69220 useless extension candidates. Maximal degree in co-relation 250573. Up to 37945 conditions per place. [2025-03-08 17:37:29,655 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 263 selfloop transitions, 23 changer transitions 16/303 dead transitions. [2025-03-08 17:37:29,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 303 transitions, 3406 flow [2025-03-08 17:37:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:37:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:37:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2025-03-08 17:37:29,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2025-03-08 17:37:29,656 INFO L175 Difference]: Start difference. First operand has 97 places, 139 transitions, 1296 flow. Second operand 5 states and 115 transitions. [2025-03-08 17:37:29,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 303 transitions, 3406 flow [2025-03-08 17:37:34,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 303 transitions, 2911 flow, removed 123 selfloop flow, removed 6 redundant places. [2025-03-08 17:37:34,429 INFO L231 Difference]: Finished difference. Result has 95 places, 149 transitions, 1289 flow [2025-03-08 17:37:34,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1289, PETRI_PLACES=95, PETRI_TRANSITIONS=149} [2025-03-08 17:37:34,430 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2025-03-08 17:37:34,430 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 149 transitions, 1289 flow [2025-03-08 17:37:34,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2025-03-08 17:37:34,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:34,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:34,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:37:34,430 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:34,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1659919136, now seen corresponding path program 2 times [2025-03-08 17:37:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394854780] [2025-03-08 17:37:34,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:34,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:37:34,445 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:37:34,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:34,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:34,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:34,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394854780] [2025-03-08 17:37:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394854780] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:34,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:37:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718202778] [2025-03-08 17:37:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:34,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:37:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:34,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:37:34,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:37:34,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:34,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 149 transitions, 1289 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-08 17:37:34,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:34,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:34,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:43,254 INFO L124 PetriNetUnfolderBase]: 84627/110030 cut-off events. [2025-03-08 17:37:43,254 INFO L125 PetriNetUnfolderBase]: For 1147970/1147970 co-relation queries the response was YES. [2025-03-08 17:37:43,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559750 conditions, 110030 events. 84627/110030 cut-off events. For 1147970/1147970 co-relation queries the response was YES. Maximal size of possible extension queue 2412. Compared 606905 event pairs, 29180 based on Foata normal form. 2005/112035 useless extension candidates. Maximal degree in co-relation 522856. Up to 66144 conditions per place. [2025-03-08 17:37:44,340 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 354 selfloop transitions, 3 changer transitions 29/387 dead transitions. [2025-03-08 17:37:44,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 387 transitions, 4156 flow [2025-03-08 17:37:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:37:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:37:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-08 17:37:44,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2025-03-08 17:37:44,341 INFO L175 Difference]: Start difference. First operand has 95 places, 149 transitions, 1289 flow. Second operand 4 states and 98 transitions. [2025-03-08 17:37:44,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 387 transitions, 4156 flow [2025-03-08 17:37:52,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 387 transitions, 4062 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:52,621 INFO L231 Difference]: Finished difference. Result has 97 places, 151 transitions, 1321 flow [2025-03-08 17:37:52,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1321, PETRI_PLACES=97, PETRI_TRANSITIONS=151} [2025-03-08 17:37:52,622 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2025-03-08 17:37:52,622 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 151 transitions, 1321 flow [2025-03-08 17:37:52,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-08 17:37:52,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:52,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:52,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:37:52,622 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:37:52,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1054403788, now seen corresponding path program 3 times [2025-03-08 17:37:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:52,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158412389] [2025-03-08 17:37:52,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:52,629 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:37:52,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:37:52,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:37:52,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:52,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:52,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158412389] [2025-03-08 17:37:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158412389] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:37:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581739489] [2025-03-08 17:37:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:52,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:37:52,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:52,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:37:52,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:37:52,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2025-03-08 17:37:52,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 151 transitions, 1321 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2025-03-08 17:37:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2025-03-08 17:37:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand